TECHNICAL
MANUAL
Litho in U.S.A
John Deere
Worldwide Commercial and
Consumer Equipment Division
GX70, GX75, GX85, SX85
GX95, SRX75 and SRX95
Riding Mowers
TM1491 (JULY99)
Replaces TM1491 (01JAN97)
INTRODUCTION
This technical manual is written for an experienced
technician and contains sections that are specifically for
this product. It is a part of a total product support
program.
The manual is organized so that all the information on a
particular system is kept together. The order of grouping
is as follows:

Table of Contents

General Diagnostic Information

Specifications

Electrical Wiring Harness Legend

Component Location

System Schematic

Wiring Harness

Troubleshooting Chart

Theory of Operation

Diagnostics

Tests & Adjustments

Repair
Note: Depending on the particular section or system
being covered, not all of the above groups may be
used.
Each section will be identified with a symbol rather than a
number. The groups and pages within a section will be
consecutively numbered.
We appreciate your input on this manual. To help, there
are postage paid post cards included at the back. If you
find any errors or want to comment on the layout of the
manual please fill out one of the cards and mail it back to
us.
All information, illustrations and
specifications in this manual are based on
the latest information available at the time of
publication. The right is reserved to make
changes at any time without notice.
COPYRIGHT 1999
Deere & Co.
John Deere Worldwide Commercial and
Consumer Equipment Division
Horicon, WI
All rights reserved
Previous Editions
COPYRIGHT 1997,
1992, 1991, 1990, 1989, and 1988
7/12/99
Information
Specifications and
Engine
Electrical
Steering
Brakes
Safety
Miscellaneous
Power Train
Attachments
1 - 1
SAFETY
RECOGNIZE SAFETY INFORMATION
This is the safety-alert symbol. When you see this
symbol on your machine or in this manual, be alert to
the potential for personal injury.
Follow recommended precautions and safe servicing
practices.
Understand Signal Words
A signal wordDANGER, WARNING, or CAUTION
is used with the safety-alert symbol. DANGER
identifies the most serious hazards.
DANGER or WARNING safety signs are located near
specific hazards. General precautions are listed on
CAUTION safety signs. CAUTION also calls attention
to safety messages in this manual.
REPLACE SAFETY SIGNS
Replace missing or damaged safety signs. See the
machine operator's manual for correct safety sign
placement.
HANDLE FLUIDS SAFELYAVOID
FIRES
Be Prepared for Emergencies
When you work around fuel, do not smoke or work near
heaters or other fire hazards.
Store flammable fluids away from fire hazards. Do not
incinerate or puncture pressurized containers.
Make sure machine is clean of trash, grease, and
debris.
Do not store oily rags; they can ignite and burn
spontaneously.
Be prepared if a fire starts.
Keep a first aid kit and fire extinguisher handy.
Keep emergency numbers for doctors, ambulance
service, hospital, and fire department near your
telephone.
1 - 2
6/29/99
SAFETY
USE CARE IN HANDLING AND
SERVICING BATTERIES
Prevent Battery Explosions
Keep sparks, lighted matches, and open flame
away from the top of battery. Battery gas can
explode.
Never check battery charge by placing a metal
object across the posts. Use a voltmeter or
hydrometer.
Do not charge a frozen battery; it may explode.
Warm battery to 16C (60F).
Prevent Acid Burns
Sulfuric acid in battery electrolyte is poisonous. It is
strong enough to burn skin, eat holes in clothing,
and cause blindness if splashed into eyes.
Avoid acid burns by:
1. Filling batteries in a well-ventilated area.
2. Wearing eye protection and rubber gloves.
3. Avoiding breathing fumes when electrolyte is
added.
4. Avoiding spilling or dripping electrolyte.
5. Using proper jump start procedure.
If you spill acid on yourself:
1. Flush your skin with water.
2. Apply baking soda or lime to help neutralize the
acid.
3. Flush your eyes with water for 1015 minutes.
4. Get medical attention immediately.
If acid is swallowed:
1. Drink large amounts of water or milk.
2. Then drink milk of magnesia, beaten eggs, or
vegetable oil.
3. Get medical attention immediately.
USE CARE AROUND HIGH-
PRESSURE FLUID LINES
Avoid High-Pressure Fluids
Escaping fluid under pressure can penetrate the skin
causing serious injury.
Avoid injury from escaping fluid under pressure by
stopping the engine and relieving pressure in the
system before disconnecting or connecting hydraulic or
other lines. Tighten all connections before applying
pressure.
Search for leaks with a piece of cardboard. Protect
hands and body from high-pressure fluids.
If an accident occurs, see a doctor immediately. Any
fluid injected into the skin must be surgically removed
within a few hours or gangrene may result. Doctors
unfamiliar with this type of injury should reference a
knowledgeable medical source. Such information is
available from Deere & Company Medical Department
in Moline, Illinois, U.S.A.
Avoid Heating Near Pressurized
Fluid Lines

Flammable spray can be generated by heating near
pressurized fluid lines, resulting in severe burns to
yourself and bystanders. Do not heat by welding,
soldering, or using a torch near pressurized fluid lines
or other flammable materials. Pressurized lines can be
accidentally cut when heat goes beyond the immediate
flame area.
6/29/99
1 - 3
SAFETY
USE SAFE SERVICE PROCEDURES
Wear Protective Clothing
Wear close fitting clothing and safety equipment
appropriate to the job.
Prolonged exposure
to
loud noise can cause
impairment or loss of hearing. Wear a suitable hearing
protective device such as earmuffs or earplugs to
protect against objectionable or uncomfortable loud
noises.
Operating equipment safely requires the full attention
of the operator. Do not wear radio or music
headphones while operating machine.
Service Machines Safely
Tie long hair behind your head. Do not wear a necktie,
scarf, loose clothing, or necklace when you work near
machine tools or moving parts. If these items were to
get caught, severe injury could result.
Remove rings and other jewelry to prevent electrical
shorts and entanglement in moving parts.
Use Proper Tools
Use tools appropriate to the work. Makeshift tools and
procedures can create safety hazards. Use power tools
only to loosen threaded parts and fasteners. For
loosening and tightening hardware, use the correct size
tools. DO NOT use U.S. measurement tools on metric
fasteners. Avoid bodily injury caused by slipping
wrenches. Use only service parts meeting John Deere
specifications.
Park Machine Safely
Before working on the machine:
1. Lower all equipment to the ground.
2. Stop the engine and remove the key.
3. Disconnect the battery ground strap.
4. Hang a "DO NOT OPERATE" tag in operator
station.
Support Machine Properly and Use
Proper Lifting Equipment
If you must work on a lifted machine or attachment,
securely support the machine or attachment.
Do not support the machine on cinder blocks, hollow
tiles, or props that may crumble under continuous load.
Do not work under a machine that is supported solely
by a jack. Follow recommended procedures in this
manual.
Lifting heavy components incorrectly can cause severe
injury or machine damage. Follow recommended
procedure for removal and installation of components
in the manual.
Work in Clean Area
Before starting a job:
1. Clean work area and machine.
2. Make sure you have all necessary tools to do your
job.
3. Have the right parts on hand.
4. Read all instructions thoroughly; do not attempt
shortcuts.
1 - 4
6/29/99
SAFETY
Using HighPressure Washers
Directing pressurized water at electronic/electrical
components or connectors, bearings, hydraulic seals,
fuel injection pumps or other sensitive parts and
components may cause product malfunctions. Reduce
pressure and spray at a 45 to 90 degree angle.
Illuminate Work Area Safely
Illuminate your work area adequately but safely. Use a
portable safety light for working inside or under the
machine. Make sure the bulb is enclosed by a wire
cage. The hot filament of an accidentally broken bulb
can ignite spilled fuel or oil.
Work in Ventilated Area
Engine exhaust fumes can cause sickness or death. If
it is necessary to run an engine in an enclosed area,
remove the exhaust fumes from the area with an
exhaust pipe extension.
If you do not have an exhaust pipe extension, open the
doors and get outside air into the area.
WARNING: California Proposition 65
Warning
Diesel engine exhaust and some of its constituents are
known to the State of California to cause cancer, birth
defects, and other reproductive harm.
Gasoline engine exhaust from this product contains
chemicals known to the State of California to cause
cancer, birth defects, or other reproductive harm.
Remove Paint Before Welding or
Heating
Avoid potentially toxic fumes and dust. Hazardous
fumes can be generated when paint is heated by
welding, soldering, or using a torch. Do all work outside
or in a well ventilated area. Dispose of paint and
solvent properly. Remove paint before welding or
heating. If you sand or grind paint, avoid breathing the
dust. Wear an approved respirator. If you use solvent or
paint stripper, remove stripper with soap and water
before welding. Remove solvent or paint stripper
containers and other flammable material from area.
Allow fumes to disperse at least 15 minutes before
welding or heating.
Avoid Harmful Asbestos Dust
Avoid breathing dust that may be generated when
handling components containing asbestos fibers.
Inhaled asbestos fibers may cause lung cancer.
Components in products that may contain asbestos
fibers are brake pads, brake band and lining
assemblies, clutch plates, and some gaskets. The
asbestos used in these components is usually found in
a resin or sealed in some way. Normal handling is not
hazardous as long as airborne dust containing
asbestos is not generated.
Avoid creating dust. Never use compressed air for
cleaning. Avoid brushing or grinding material
containing asbestos. When servicing, wear an
approved respirator. A special vacuum cleaner is
recommended to clean asbestos. If not available, apply
a mist of oil or water on the material containing
asbestos. Keep bystanders away from the area.
SERVICE TIRES SAFELY
Explosive separation of a tire and rim parts can cause
serious injury or death.
Do not attempt to mount a tire unless you have the
proper equipment and experience to perform the job.
Always maintain the correct tire pressure. Do not inflate
the tires above the recommended pressure. Never weld
or heat a wheel and tire assembly. The heat can cause
an increase in air pressure resulting in a tire explosion.
Welding can structurally weaken or deform the wheel.
When inflating tires, use a clip-on chuck and extension
hose long enough to allow you to stand to one side and
NOT in front of or over the tire assembly. Use a safety
cage if available.
Check wheels for
low pressure, cuts, bubbles,
damaged rims or missing lug bolts and nuts.
6/29/99
1 - 5
SAFETY
AVOID INJURY FROM ROTATING
BLADES, AUGERS AND PTO
SHAFTS
Keep hands and feet away while machine is running.
Shut off power to service, lubricate, or remove mower
blades, augers, or PTO shafts.
SERVICE COOLING SYSTEM
SAFELY
Explosive release of fluids from pressurized cooling
system can cause serious burns.
Shut off machine. Remove filler cap only when cool
enough to touch with bare hands. Slowly loosen cap to
first stop
to relieve pressure before removing
completely.
HANDLE CHEMICAL PRODUCTS
SAFELY
Direct exposure to hazardous chemicals can cause
serious injury. Potentially hazardous chemicals used
with John Deere equipment include such items as
lubricants, coolants, paints, and adhesives.
A Material Safety Data Sheet (MSDS) provides specific
details on chemical products: physical and health
hazards, safety procedures, and emergency response
techniques. Check the MSDS before you start any job
using a hazardous chemical. That way you will know
exactly what the risks are and how to do the job safely.
Then follow procedures and recommended equipment.
Dispose of Waste Properly
Improperly disposing of waste can threaten the
environment and ecology. Potentially harmful waste
used with John Deere equipment includes such items
as oil, fuel, coolant, brake fluid, filters, and batteries.
Use leakproof containers when draining fluids. Do not
use food or beverage containers that may mislead
someone into drinking from them. Do not pour waste
onto the ground, down a drain, or into any water
source. Inquire on the proper way to recycle or dispose
of waste from your local environmental or recycling
center, or from your John Deere dealer.
LIVE WITH SAFETY
Before returning machine to customer, make sure
machine is functioning properly, especially the safety
systems. Install all guards and shields.
1 - 6
6/29/99
SPECIFICATIONS AND INFORMATION
CONTENTS
Page
CONTENTS
7/12/99
2 - 1
SPECIFICATIONS AND INFORMATION
SPECIFICATIONSGX70/GX75 AND SRX75
GENERAL SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SPECIFICATIONSGX95 AND SRX75/SRX95
GENERAL SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SPECIFICATIONSGX85/SX85
GENERAL SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
METRIC FASTENER TORQUE VALUES . . . . . . . . . . . . . . . . . . . . . . . . . 5
METRIC FASTENER TORQUE VALUEGRADE 7 . . . . . . . . . . . . . . . . 6
INCH FASTENER TORQUE VALUES . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
O-RING SEAL SERVICE RECOMMENDATIONS
FACE SEAL FITTINGS WITH INCH STUD ENDS TORQUE . . . . . . . . . . . . . . . . . . . 8
FACE SEAL FITTINGS WITH METRIC STUD ENDS TORQUE. . . . . . . . . . . . . . . . . 9
O-RING FACE SEAL FITTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
O-RING BOSS FITTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
GASOLINE SPECIFICATIONS
4CYCLE ENGINESNORTH AMERICA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
GASOLINE STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4CYCLE ENGINESEUROPE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
GASOLINE STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
OIL AND LUBRICANT SPECIFICATIONS
4CYCLE GASOLINE ENGINE OILNORTH AMERICA (KAWASAKI ENGINES) . 13
4CYCLE GASOLINE ENGINE OILEUROPE (KAWASAKI ENGINES) . . . . . . . . 13
4CYCLE GASOLINE ENGINE OILNORTH AMERICA
(BRIGGS & STRATTON ENGINES). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4CYCLE GASOLINE ENGINE OILEUROPE
(BRIGGS & STRATTON ENGINES). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
BREAKIN 4-CYCLE GASOLINE ENGINE OILNORTH AMERICA . . . . . . . . . . . 15
BREAKIN 4-CYCLE GASOLINE ENGINE OILEUROPE . . . . . . . . . . . . . . . . . . . 16
GEAR TRANSMISSION GREASENORTH AMERICA . . . . . . . . . . . . . . . . . . . . . 17
GEAR TRANSMISSION GREASEEUROPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
ANTI-CORROSION GREASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
GREASENORTH AMERICA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
GREASE EUROPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
ALTERNATIVE LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
SYNTHETIC LUBRICANTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
LUBRICANT STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
MIXING OF LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
OIL FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2 - 2
SPECIFICATIONSGX70/GX75 AND SRX75
SPECIFICATIONS AND INFORMATION
SPECIFICATIONSGX70/GX75 AND SRX75
GENERAL SPECIFICATIONS
Engine:
Make . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .John Deere "K" Series
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FC290V
Starting System:
GX70. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Recoil
GX75 and SRX75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electric
Crankcase Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 L (1.16 U.S. qt)
Electrical System:
Type GX70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N/A
Type GX75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Volt
Battery Size GX70. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N/A
Battery Size GX75 and SRX75 . . . . . . . . . . . . . 160 Cold Cranking Amps at18C (0F)
Alternator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Amp
Fuel System:
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Carburetor
Fuel Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gravity Fed
Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0 L (1.1 U.S. gal)
Drive Train:
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gear Transaxle
Number of Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Travel Speeds at Full Engine RPM:
Forward. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 08.7 km/h (05.4 mph)
1st Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 km/h (1.1 mph)
2nd Gear. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5 km/h (2.2 mph)
3rd Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3 km/h (3.3 mph)
4th Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.8 km/h (4.2 mph)
5th Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.0 km/h (5.0 mph)
Reverse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 km/h (1.9 mph)
Final Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spur Gear
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disk
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sector and Pinion
Tires:
Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 x 4.005
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 x 6.508
Overall Dimensions:
Wheelbase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1060 mm (42 in.)
Minimum Ground Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 mm (3.74 in.)
Overall Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1570 mm (62 in.)
Overall Width:
W/O Deck (Front) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 694 mm (27.3 in.)
W/O Deck (Rear) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 780 mm (30.7 in.)
W/Deck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 790 mm (31.1 in.)
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1010 mm (39.76 in.)
Weight GX70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143 kg (315 lb)
Weight GX75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155 kg (340 lb)
7/19/99
7/19/99
SPECIFICATIONS AND INFORMATION
SPECIFICATIONSGX95 AND SRX75/SRX95
SPECIFICATIONSGX95 AND SRX75/SRX95
GENERAL SPECIFICATIONS
Engine:
Make . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .John Deere "K" Series
Model SRX75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FC290V
Models GX95 and SRX95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FB460V
Starting System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electric
Crankcase Capacity:
SRX75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 L (1.16 U.S. qt)
GX95 and SRX95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 L (1.48 U.S. qt)
Electrical System:
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Volt
Battery Size. . . . . . . . . . . . . . . . . . . . . . . . . . . 160 Cold Cranking Amps at 18C (0F)
Alternator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Amp
Fuel System:
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Carburetor
Fuel Delivery:
SRX75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gravity Fed
SRX95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel Pump
Fuel Tank Capacity
SRX75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5 L (0.91 U.S. gal)
GX95 and SRX95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5 L (1.6 U.S. gal)
Drive Train:
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gear Transaxle
Number of Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Variable
Travel Speeds at Full Engine RPM:
Forward. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 08 km/h (05 mph)
Reverse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5 km/h (2.2 mph)
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disk
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sector and Pinion
Tires:
Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 x 4.005
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 x 6.508
Overall Dimensions:
Wheelbase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1060 mm (42 in.)
Minimum Ground Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 mm (3.74 in.)
Overall Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1570 mm (62 in.)
Overall Width:
W/O Deck (Front) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 694 mm (27.3 in.)
W/O Deck (Rear) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 780 mm (30.7 in.)
W/Deck SRX75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 790 mm (31.1 in.)
W/Deck GX95 and SRX95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1040 mm (40.9 in.)
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1010 mm (39.76 in.)
Weight:
SRX75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .167 kg (367 lbs)
GX95 and SRX95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .196 kg (431 lbs)
2 - 3
2 - 4
SPECIFICATIONSGX85/SX85
SPECIFICATIONS AND INFORMATION
SPECIFICATIONSGX85/SX85
GENERAL SPECIFICATIONS
Engine:
Make . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Briggs & Stratton "Diamond I/C"
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28M707
Starting System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electric
Crankcase Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 L (1.48 U.S. qt)
Electrical System:
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Volt
Battery Size. . . . . . . . . . . . . . . . . . . . . . . . . . . 160 Cold Cranking Amps at 18C (0F)
Alternator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Amp
Fuel System:
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Carburetor
Fuel Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel Pump
Fuel Tank Capacity:
GX85. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 L (1.1 U.S. gal)
SX85 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5 L (0.91 U.S. gal)
Drive Train:
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gear Transaxle
Number of Speeds GX85 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Number of Speeds SX85 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Variable
Travel Speeds at Full Engine RPM:
Forward. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 08 km/h (05 mph)
1st Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 km/h (1.1 mph)
2nd Gear. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5 km/h (2.2 mph)
3rd Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3 km/h (3.3 mph)
4th Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.8 km/h (4.2 mph)
5th Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.0 km/h (5.0 mph)
Reverse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 km/h (1.9 mph)
Final Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spur Gear
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disk
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sector & Pinion
Tires:
Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 x 4.005
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 x 6.508
Overall Dimensions:
Wheelbase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1060 mm (42 in.)
Minimum Ground Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 mm (3.74 in.)
Overall Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1570 mm (62 in.)
Overall Width:
W/O Deck (Front) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 694 mm (27.3 in.)
W/O Deck (Rear) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 780 mm (30.7 in.)
W/Deck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 790 mm (31.1 in.)
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1010 mm (39.76 in.)
Weight:
GX85. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155 kg (340 lb)
SX85 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168 kg (370 lb)
7/19/99
SPECIFICATIONS AND INFORMATION
METRIC FASTENER TORQUE VALUES
METRIC FASTENER TORQUE VALUES
Class 4.8
Class 8.8 or 9.8
Class 10.9
Class 12.9
Lubricateda
Drya
Lubricateda
Drya
Lubricateda
Drya
Lubricateda
Drya
SIZE Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
M6
4.8
3.5
6
4.5
9
6.5
11
8.5
13
9.5
17
12
15
11.5
19
14.5
M8
12
8.5
15
11
22
16
28
20
32
24
40
30
37
28
47
35
M10
23
17
29
21
43
32
55
40
63
47
80
60
75
55
95
70
M12
40
29
50
37
75
55
95
70
110
80
140
105
130
95
165
120
M14
63
47
80
60
120
88
150
110
175
130
225
165
205
150
260
109
M16
100
73
125
92
190
140
240
175
275
200
350
225
320
240
400
300
M18
135
100
175
125
260
195
330
250
375
275
475
350
440
325
560
410
M20
190
140
240
180
375
275
475
350
530
400
675
500
625
460
800
580
M22
260
190
330
250
510
375
650
475
725
540
925
675
850
625
1075
800
M24
330
250
425
310
650
475
825
600
925
675
1150
850
1075
800
1350
1000
M27
490
360
625
450
950
700
1200
875
1350
1000
1700
1250
1600
1150
2000
1500
M30
675
490
850
625
1300
950
1650
1200
1850
1350
2300
1700
2150
1600
2700
2000
M33
900
675
1150
850
1750
1300
2200
1650
2500
1850
3150
2350
2900
2150
3700
2750
M36
1150
850
1450
1075
2250
1650
2850
2100
3200
2350
4050
3000
3750
2750
4750
3500
TS1163
4.8
8.8
9.8
10.9
12.9
5
10
12Property
Class
and
Head
Markings
Property
Class
and
Nut
Markings
4.8
4.8
55
8.8
8.8
9.8
9.8
10.9
10.9
12.9
12.9
12.9
12
12
10
10
10
1010

DO NOT use these hand torque values if a different
torque value or tightening procedure is given for a
specific application. Torque values listed are for
general use only and include a 10% variance factor.
Check tightness of fasteners periodically. DO NOT use
air powered wrenches.
Shear bolts are designed to fail under predetermined
loads. Always replace shear bolts with identical grade.
Fasteners should be replaced with the same class.
Make sure fastener threads are clean and that you
properly start thread engagement. This will prevent
them from failing when tightening.
When bolt and nut combination fasteners are used,
torque values should be applied to the NUT instead of
the bolt head.
Tighten toothed or serrated-type lock nuts to the full
torque value.
a "Lubricated" means coated with a lubricant such
as engine oil, or fasteners with phosphate and oil
coatings. "Dry" means plain or zinc plated (yellow
dichromate - Specification JDS117) without any
lubrication.
Reference: JDSG200.
7/19/99
2 - 5
METRIC FASTENER TORQUE VALUEGRADE 7
SPECIFICATIONS AND INFORMATION
METRIC FASTENER TORQUE
VALUEGRADE 7
Size
Steel or Gray
Iron Torque
Aluminum
Torque
Nm
lb-ft
Nm
lb-ft
M6
11
8
8
6
M8
24
18
19
14
M10
52
38
41
30
M12
88
65
70
52
M14
138
102
111
82
M16
224
165
179
132
2 - 6
7/19/99
SPECIFICATIONS AND INFORMATION
INCH FASTENER TORQUE VALUES
INCH FASTENER TORQUE VALUES
Grade 1
Grade 2b
Grade 5, 5.1 or 5.2
Grade 8 or 8.2
Lubricateda
Drya
Lubricateda
Drya
Lubricateda
Drya
Lubricateda
Drya
SIZE Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
1/4
3.7
2.8
4.7
3.5
6
4.5
7.5
5.5
9.5
7
12
9
13.5
10
17
12.5
5/16
7.7
5.5
10
7
12
9
15
11
20
15
25
18
28
21
35
26
3/8
14
10
17
13
22
16
27
20
35
26
44
33
50
36
63
46
7/16
22
16
28
20
35
26
44
32
55
41
70
52
80
58
100
75
1/2
33
25
42
31
53
39
67
50
85
63
110
80
120
90
150
115
9/16
48
36
60
45
75
56
95
70
125
90
155
115
175
130
225
160
5/8
67
50
85
62
105
78
135
100
170
125
215
160
215
160
300
225
3/4
120
87
150
110
190
140
240
175
300
225
375
280
425
310
550
400
7/8
190
140
240
175
190
140
240
175
490
360
625
450
700
500
875
650
1
290
210
360
270
290
210
360
270
725
540
925
675
1050
750
1300
975
1-1/8
470
300
510
375
470
300
510
375
900
675
1150
850
1450
1075
1850
1350
1-1/4
570
425
725
530
570
425
725
530
1300
950
1650
1200
2050
1500
2600
1950
1-3/8
750
550
950
700
750
550
950
700
1700
1250
2150
1550
2700
2000
3400
2550
1-1/2
1000
725
1250
925
990
725
1250
930
2250
1650
2850
2100
3600
2650
4550
3350
TS1162
1 or 2b
2
5
5.1
5.2
5
8
8.2
8
No Marks
No Marks
SAE
Grade
and Nut
Markings
SAE
Grade
and Head
Markings

DO NOT use these hand torque values if a different
torque value or tightening procedure is given for a
specific application. Torque values listed are for
general use only and include a 10% variance factor.
Check tightness of fasteners periodically. DO NOT use
air powered wrenches.
Shear bolts are designed to fail under predetermined
loads. Always replace shear bolts with identical grade.
Fasteners should be replaced with the same grade.
Make sure fastener threads are clean and that you
properly start thread engagement. This will prevent
them from failing when tightening.
When bolt and nut combination fasteners are used,
torque values should be applied to the NUT instead of
the bolt head.
Tighten toothed or serrated-type lock nuts to the full
torque value.
a "Lubricated" means coated with a lubricant such
as engine oil, or fasteners with phosphate and oil
coatings. "Dry" means plain or zinc plated (yellow
dichromate - Specification JDS117) without any
lubrication.
b "Grade 2" applies for hex cap screws (not hex
bolts) up to 152 mm (6-in.) long. "Grade 1"
applies for hex cap screws over 152 mm (6-in.)
long, and for all other types of bolts and screws
of any length.
Reference: JDSG200.
7/19/99
2 - 7
O-RING SEAL SERVICE RECOMMENDATIONS
SPECIFICATIONS AND INFORMATION
O-RING SEAL SERVICE RECOMMENDATIONS
FACE SEAL FITTINGS WITH INCH STUD ENDS TORQUE
NOTE: Torque tolerance is + 15 minus 20%.
Nominal Tube O.D./Hose I.D.
Face Seal Tube/Hose End
O-ring Stud Ends
Metric
Tube
O.D.
Inch Tube O.D.
Thread Size
Tube Nut/
Swivel Nut
Torque
Bulkhead
Locknut
Torque
Thread
Size
Straight Fitting or
Locknut Torque
mm Dash
Size
in.
mm
in.
Nm
lb-ft Nm
lb-ft
in.
Nm
lb-ft
-3
0.188
4.76
3/8-24
8
6
6
-4
0.250
6.35
9/16-18
16
12
12
9
7/16-20
12
9
8
-5
0.312
7.94
1/2-20
16
12
10
-6
0.375
9.52
11/16-16
24
18
24
18
9/16-18
24
18
12
-8
0.500
12.70
13/16-16
50
37
46
34
3/4-16
46
34
16
-10
0.625
15.88
1-14
69
51
62
46
7/8-14
62
46
-12
0.750
19.05
1-3/16-12
102
75
102
75
1-1/16-12
102
75
22
-14
0.875
22.22
1-3/16-12
102
75
102
75
1-3/16-12
122
90
25
-16
1.000
25.40
1-7/16-12
142
105
142
105
1-5/16-12
142
105
32
-20
1.25
31.75
1-11/16-12
190
140
190
140
1-5/8-12
190
140
38
-24
1.50
38.10
2-12
217
160
217
160
1-7/8-12
217
160
Stud End
Tube Nut
Swivel Nut
Locknut
Tube Nut
Stud End
Stud Straight and Tube Nut
Bulkhead Union and Bulkhead Lucknut
90 Swivel Elbow and Tube Nut
90 Adjustable Stud Elbow
2 - 8
7/19/99
SPECIFICATIONS AND INFORMATION
O-RING SEAL SERVICE RECOMMENDATIONS
FACE SEAL FITTINGS WITH METRIC STUD ENDS TORQUE
NOTE: Torque tolerance is + 15 minus 20%.
Nominal Tube O.D./Hose
I.D.
Face Seal Tube/Hose End
O-ring Stud Ends, Straight Fitting or
Locknut
Metric
Tube
O.D.
Inch Tube O.D.
Thread
Size
Hex
Size
Tube Nut/
Swivel
Nut
Torque
Bulkhead
Locknut
Torque
Thread
Size
Hex
Size
Steel or
Gray Iron
Torque
Aluminum
Torque
mm Dash
Size
in.
mm
in.
mm Nm lb-ft Nm lb-ft
mm
mm Nm lb-ft Nm lb-ft
6
-4
0.250
6.35
9/16-18
17
16
12
12
9 M12X1.5
17
21
15.5
9
6.6
8
-5
0.312
7.94
M14X1.5
19
33
24
15
11
10
-6
0.375
9.52
11/16-16
22
24
18
24
18 M16X1.5
22
41
30
18
13
12
-8
0.500 12.70 13/16-16
24
50
37
46
34 M18X1.5
24
50
37
21
15
16
-10
0.625 15.88
1-14
30
69
51
62
46 M22X1.5
27
69
51
28
21
-12
0.750 19.05 1-3/16-12
36 102 75 102 75
M27X2
32
102
75
46
34
22
-14
0.875 22.22 1-3/16-12
36 102 75 102 75
M30X2
36
25
-16
1.000 25.40 1-7/16-12
41 142 105 142 105 M33X2
41
158 116
71
52
28
M38X2
46
176 130
79
58
32
-20
1.25
31.75 1-11/16-12 50 190 140 190 140 M42X2
50
190 140
85
63
38
-24
1.50
38.10
2-12
60 217 160 217 160 M48X2
55
217 160
98
72
Stud End
Tube Nut
Stud Straight and Tube Nut
Bulkhead Union and Bulkhead Lucknut
Swivel Nut
Locknut
Tube Nut
Stud End
90 Swivel Elbow and Tube Nut
90 Adjustable Stud Elbow
Groove For Metric
Identification
Groove For Metric Identification
7/19/99
2 - 9
O-RING SEAL SERVICE RECOMMENDATIONS
SPECIFICATIONS AND INFORMATION
O-RING FACE SEAL FITTINGS
1. Inspect the fitting sealing surfaces. They must be
free of dirt or defects.
2. Inspect the O-ring. It must be free of damage or
defects.
3. Lubricate O-rings and install into groove using
petroleum jelly to hold in place.
4. Push O-ring into the groove with plenty of
petroleum jelly so O-ring is not displaced during
assembly.
5. Index angle fittings and tighten by hand pressing
joint together to insure O-ring remains in place.
6. Tighten fitting or nut to torque value shown on the
chart per dash size stamped on the fitting. Do not
allow hoses to twist when tightening fittings.
O-RING BOSS FITTINGS
1. Inspect boss O-ring boss seat. It must be free of dirt
and defects. If repeated leaks occur, inspect for
defects with a magnifying glass. Some raised
defects can be removed with a slip stone.
2. Put hydraulic oil or petroleum jelly on the O-ring.
Place electrical tape over the threads to protect O-
ring from nicks. Slide O-ring over the tape and into
the groove of fitting. Remove tape.
.
3. For angle fittings, loosen special nut and push
special washer against threads so O-ring can be
installed into the groove of fitting.
4. Turn fitting into the boss by hand until special
washer or washer face (straight fitting) contacts
boss face and O-ring is squeezed into its seat.
5. To position angle fittings, turn the fitting counter-
clockwise a maximum of one turn.
6. Tighten straight fittings to torque value shown on
chart. For angle fittings, tighten the special nut to
value shown in the chart while holding body of
fitting with a wrench.
Sealing Surface
O-ring
Sealing Surface
Groove
O-ring
STRAIGHT FITTING OR SPECIAL NUT TORQUE
Thread
Size
Torquea
a. Torque tolerance is 10 percent.
Number
of Flatsb
b. To be used if a torque wrench cannot be used.
After tightening fitting by hand, put a mark on nut or
boss; then tighten special nut or straight fitting the
number of flats shown.
Nm
lb-ft
3/8-24 UNF
8
(6)
2
7/16-20 UNF
12
(9)
2
1/2-20 UNF
16
(12)
2
9/16-18 UNF
24
(18)
2
3/4-16 UNF
46
(34)
2
7/8-14 UNF
62
(46)
1-1/2
1-1/16-12 UN
102
(75)
1
1-3/16-12 UN
122
(90)
1
1-5/16-12 UN
142
(105)
3/4
1-5/8-12 UN
190
(140)
3/4
1-7/8-12 UN
217
(160)
1/2
Special Nut
Special Washer
Angle Fitting
2 - 10
7/19/99
SPECIFICATIONS AND INFORMATION
GASOLINE SPECIFICATIONS
GASOLINE SPECIFICATIONS
4CYCLE ENGINESNORTH AMERICA
c CAUTION
Gasoline is HIGHLY FLAMMABLE, handle it with care.
DO NOT refuel machine while:
indoors, always fill gas tank outdoors
machine is near an open flame or sparks
engine is running, STOP engine
engine is hot, allow it to cool sufficiently first
smoking
Help prevent fires:
fill gas tank to bottom of filler neck only
be sure fill cap is tight after fueling
clean up any gas spills IMMEDIATELY
keep machine clean and in good repairfree of excess grease, oil, debris, and faulty or damaged parts
any storage of machines with gas left in tank should be in an area that is well ventilated to prevent
possible igniting of fumes by an open flame or spark, this includes any appliance with a pilot light
To prevent fire or explosion caused by STATIC ELECTRIC DISCHARGE during fueling:
ONLY use a clean, approved POLYETHYLENE PLASTIC fuel container and funnel WITHOUT any metal
screen or filter
NO STATIC ELECTRIC
DISCHARGE
NO SMOKING
NO HOT ENGINE
STOP ENGINE
NO OPEN FLAME
OR SPARK

To avoid engine damage:
DO NOT mix oil with gasoline
ONLY use clean, fresh unleaded gasoline with
an octane rating (anti-knock index) of 87 or
higher
fill gas tank at the end of each day's operation to
help prevent condensation from forming inside a
partially filled tank
keep up with specified service intervals
Use of alternative oxygenated, gasohol blended,
unleaded gasoline is acceptable as long as:
the ethyl or grain alcohol blends DO NOT exceed
10% by volume or
methyl tertiary butyl ether (MTBE) blends DO NOT
exceed 15% by volume
IMPORTANT: DO NOT use METHANOL gasolines
because METHANOL
is harmful
to
the
environment and to your health.
GASOLINE STORAGE
IMPORTANT: Keep all dirt, scale, water or other
foreign material out of gasoline.
Keep gasoline stored in a safe, protected area. Storage
of gasoline in a clean, properly marked ("UNLEADED
GASOLINE") POLYETHYLENE PLASTIC container
WITHOUT any metal screen or filter is recommended.
DO NOT use de-icers to attempt to remove water from
gasoline or depend on fuel filters to remove water from
gasoline. Use a water separator installed in the storage
tank outlet. BE SURE to properly discard unstable or
contaminated gasoline. When storing unit or gasoline,
it is recommended that you add John Deere Gasoline
Conditioner and Stabilizer
(TY15977) or an
equivalent to the gasoline. BE SURE to follow
directions on container and to properly discard empty
container.
c WARNING
California Proposition 65 Warning: Gasoline
engine exhaust from this product contains
chemicals known to the State of California to
cause
cancer,
birth
defects,
or
other
reproductive harm.
7/19/99
2 - 11
GASOLINE SPECIFICATIONS
SPECIFICATIONS AND INFORMATION
4CYCLE ENGINESEUROPE
c CAUTION
Gasoline is HIGHLY FLAMMABLE, handle it with care.
DO NOT refuel machine while:
indoors, always fill gas tank outdoors
machine is near an open flame or sparks
engine is running, STOP engine
engine is hot, allow it to cool sufficiently first
smoking
Help prevent fires:
fill gas tank to bottom of filler neck only
be sure fill cap is tight after fueling
clean up any gas spills IMMEDIATELY
keep machine clean and in good repairfree of excess grease, oil, debris, and faulty or damaged parts
any storage of machines with gas left in tank should be in an area that is well ventilated to prevent
possible igniting of fumes by an open flame or spark, this includes any appliance with a pilot light
To prevent fire or explosion caused by STATIC ELECTRIC DISCHARGE during fueling:
ONLY use a clean, approved POLYETHYLENE PLASTIC fuel container and funnel WITHOUT any metal
screen or filter
NO STATIC ELECTRIC
DISCHARGE
NO SMOKING
NO HOT ENGINE
STOP ENGINE
NO OPEN FLAME
OR SPARK

To avoid engine damage:
DO NOT mix oil with gasoline
ONLY use clean, fresh unleaded gasoline with
an octane rating (anti-knock index) of 87 or
higher
fill gas tank at the end of each day's operation to
help prevent condensation from forming inside a
partially filled tank
keep up with specified service intervals
Use of alternative oxygenated, gasohol blended,
unleaded gasoline is acceptable as long as:
the ethyl or grain alcohol blends DO NOT exceed
10% by volume or
methyl tertiary butyl ether (MTBE) blends DO NOT
exceed 15% by volume
IMPORTANT: DO NOT use METHANOL gasolines
because METHANOL
is harmful
to
the
environment and to your health.
GASOLINE STORAGE
IMPORTANT: Keep all dirt, scale, water or other
foreign material out of gasoline.
Keep gasoline stored in a safe, protected area. Storage
of gasoline in a clean, properly marked ("UNLEADED
GASOLINE") POLYETHYLENE PLASTIC container
WITHOUT any metal screen or filter is recommended.
DO NOT use de-icers to attempt to remove water from
gasoline or depend on fuel filters to remove water from
gasoline. Use a water separator installed in the storage
tank outlet. BE SURE to properly discard unstable or
contaminated gasoline. When storing unit or gasoline,
it is recommended that you add John Deere Gasoline
Conditioner and Stabilizer
(TY15977) or an
equivalent to the gasoline. BE SURE to follow
directions on container and to properly discard empty
container.
2 - 12
7/19/99
SPECIFICATIONS AND INFORMATION
OIL AND LUBRICANT SPECIFICATIONS
OIL AND LUBRICANT
SPECIFICATIONS
4CYCLE GASOLINE ENGINE OIL
NORTH AMERICA
(KAWASAKI ENGINES)
Use the appropriate oil viscosity based on the expected
air temperature range during the period between
recommended oil changes. Operating outside of these
recommended oil air temperature ranges may cause
premature engine failure.
The following John Deere oils are PREFERRED:
PLUS4SAE 10W-40
TORQGARD SUPREMESAE 5W-30
The
following
John Deere
oils
are also
recommended, based on their specified temperature
range:
TURFGARDSAE 10W-30
PLUS4SAE 10W-30
TORQGARD SUPREMESAE 30
Other oils may be used if above John Deere oils are
not available, provided they meet one of the following
specifications:
SAE 10W-40API Service Classification SG or
higher
SAE 5W-30API Service Classification SG or
higher
SAE 10W-30API Service Classification SG or
higher
SAE 30API Service Classification SC or higher
4CYCLE GASOLINE ENGINE OIL
EUROPE (KAWASAKI ENGINES)
Use the appropriate oil viscosity based on the expected
air temperature range during the period between
recommended oil changes. Operating outside of these
recommended oil air temperature ranges may cause
premature engine failure.
The following John Deere oils are PREFERRED:
TORQGARD SUPREMESAE 10W-40
UNIGARDSAE 10W-40
TORQGARD SUPREMESAE 5W-30
UNIGARDSAE 5W-30
The
following
John Deere
oils
are also
recommended, based on their specified temperature
range:
TORQGARD SUPREMESAE 10W-30
UNIGARDSAE 10W-30
TORQGARD SUPREMESAE 30
UNIGARDSAE 30
Other oils may be used if above John Deere oils are
not available, provided they meet one of the following
specifications:
CCMC Specification G4 or higher
AIR TEMPERATURE
SAE 10W-40M58275
SAE 5W-30PREFERRED
SAE 10W-30SAE 30AIR TEMPERATURE
SAE 10W-40M58275
SAE 5W-30PREFERRED
SAE 10W-30SAE 30
7/19/99
2 - 13
OIL AND LUBRICANT SPECIFICATIONS
SPECIFICATIONS AND INFORMATION
4CYCLE GASOLINE ENGINE OIL
NORTH AMERICA
(BRIGGS & STRATTON ENGINES)
Use the appropriate oil viscosity based on the expected
air temperature range during the period between
recommended oil changes. Operating outside of these
recommended oil air temperature ranges may cause
premature engine failure.
The following John Deere oils are PREFERRED:
TORQGARD SUPREMESAE 30
TORQGARD SUPREMESAE 5W-30
The
following
John Deere
oils
are also
recommended, based on their specified temperature
range
TURFGARDSAE 10W-30
PLUS4SAE 10W-30
Other oils may be used if above John Deere oils are
not available, provided they meet one of the following
specifications:
SAE 30API Service Classification SC or higher
SAE 5W-30API Service Classification SG or
higher
SAE 10W-30API Service Classification SG or
higher
4CYCLE GASOLINE ENGINE OIL
EUROPE
(BRIGGS & STRATTON ENGINES)
Use the appropriate oil viscosity based on the expected
air temperature range during the period between
recommended oil changes. Operating outside of these
recommended oil air temperature ranges may cause
premature engine failure.
The following John Deere oils are PREFERRED:
TORQGARD SUPREMESAE 30
UNIGARDSAE 30
TORQGARD SUPREMESAE 5W-30
UNIGARDSAE 5W-30
The
following
John Deere
oils
are also
recommended, based on their specified temperature
range:
TORQGARD SUPREMESAE 10W-30
UNIGARDSAE 10W-30
Other oils may be used if above John Deere oils are
not available, provided they meet one of the following
specifications:
CCMC Specification G4 or higher
AIR TEMPERATURE
SAE 30M58275
SAE 5W-30PREFERRED
SAE 10W-30AIR TEMPERATURE
SAE 30M58275
SAE 5W-30PREFERRED
SAE 10W-30
2 - 14
7/19/99
SPECIFICATIONS AND INFORMATION
OIL AND LUBRICANT SPECIFICATIONS
BREAKIN 4-CYCLE GASOLINE
ENGINE OILNORTH AMERICA
IMPORTANT: ONLY use a quality break-in oil in
rebuilt or remanufactured engines for the first 5
hours (maximum) of operation. DO NOT use oils
with heavier viscosity weights than SAE 5W-30
or oils meeting specifications API SG or SH,
these
oils will
not
allow
rebuilt
or
remanufactured engines to break-in properly.
The following John Deere oil is PREFERRED:
BREAKIN ENGINE OIL
John Deere BREAKIN ENGINE OIL is formulated
with special additives for aluminum and cast iron type
engines to allow the power cylinder components
(pistons, rings, and liners as well) to "wear-in" while
protecting other engine components, valve train and
gears, from abnormal wear. Engine rebuild instructions
should be followed closely to determine if special
requirements are necessary.
John Deere BREAKIN ENGINE OIL
is also
recommended for non-John Deere engines, both
aluminum and cast iron types.
The following John Deere oil is also recommended as
a break-in engine oil:
TORQGARD SUPREMESAE 5W-30
If the above recommended John Deere oils are not
available, use a break-in engine oil meeting the
following specification during the first 5 hours
(maximum) of operation:
SAE 5W-30API Service Classification SE or
higher
IMPORTANT: After the break-in period, use the
John Deere oil that is recommended for this
engine.
M58275
BREAK-IN OILAIR TEMPERATURE
PREFERRED
SAE 5W-30
7/19/99
2 - 15
OIL AND LUBRICANT SPECIFICATIONS
SPECIFICATIONS AND INFORMATION
BREAKIN 4-CYCLE GASOLINE
ENGINE OILEUROPE
IMPORTANT: ONLY use a quality break-in oil in
rebuilt or remanufactured engines for the first 5
hours (maximum) of operation. DO NOT use oils
with heavier viscosity weights than SAE 5W-30
or oils meeting CCMC Specification G5these
oils will not allow rebuilt or remanufactured
engines to break-in properly.
The following John Deere oil is PREFERRED:
BREAKIN ENGINE OIL
John Deere BREAKIN ENGINE OIL is formulated
with special additives for aluminum and cast iron type
engines to allow the power cylinder components
(pistons, rings, and liners as well) to "wear-in" while
protecting other engine components, valve train and
gears, from abnormal wear. Engine rebuild instructions
should be followed closely to determine if special
requirements are necessary.
John Deere BREAKIN ENGINE OIL
is also
recommended for non-John Deere engines, both
aluminum and cast iron types.
The following John Deere oil is also recommended as
a break-in engine oil:
TORQGARD SUPREMESAE 5W-30
If the above recommended John Deere oils are not
available, use a break-in engine oil meeting the
following specification during the first 5 hours
(maximum) of operation:
SAE 5W-30CCMC Specification G4 or higher
IMPORTANT: After the break-in period, use the
John Deere oil that is specified for this engine.
GEAR TRANSMISSION GREASE
NORTH AMERICA
Use the following gear grease based on the air
temperature
range. Operating outside of
the
recommended grease air temperature range may
cause premature gear transmission failure.
IMPORTANT: ONLY use a quality gear grease in
this transmission. DO NOT mix any other
greases in this transmission. DO NOT use any
BIOGREASE in this transmission.
The
following
John Deere gear
grease
is
PREFERRED:
NON-CLAY HIGH-TEMPERATURE EP
GREASEJDM J13E4, NLGI Grade 2
Other gear greases may be used
if above
recommended John Deere gear grease is not
available, provided they meet one of the following
specification:
John Deere Standard JDM J13E4, NLGI Grade 2
M58275
BREAK-IN OILAIR TEMPERATURE
PREFERRED
SAE 5W-30
2 - 16
7/19/99
SPECIFICATIONS AND INFORMATION
OIL AND LUBRICANT SPECIFICATIONS
GEAR TRANSMISSION GREASE
EUROPE
Use the following gear grease based on the air
temperature
range. Operating outside of
the
recommended grease air temperature range may
cause premature gear transmission failure.
IMPORTANT: ONLY use a quality gear grease in
this transmission. DO NOT mix any other
greases in this transmission. DO NOT use any
BIOGREASE in this transmission.
The
following
John Deere gear
grease
is
PREFERRED:
GREASEGARDJDM J13E4, NLGI Grade 2
Other gear greases may be used
if above
recommended John Deere gear grease is not
available,
provided
they meet
the
following
specification:
John Deere Standard JDM J13E4, NLGI Grade 2
JDM J13E4M58275
AIR TEMPERATURE
NLGI Grade 2JDM J13E4NLGI Grade 2M58275
AIR TEMPERATURE
7/19/99
2 - 17
OIL AND LUBRICANT SPECIFICATIONS
SPECIFICATIONS AND INFORMATION
ANTI-CORROSION GREASE
SPECIFICATIONS
This anti-corrosion grease is formulated to provide the
best protection against absorbing moisture, which is
one of the major causes of corrosion. This grease is
also superior in its resistance to separation and
migration.
The following anti-corrosion grease is PREFERRED:
DuBois MPG-2 Multi-Purpose Polymer
GreaseM79292
Other greases may be used if they meet or exceed the
following specifications:
John Deere Standard JDM J13A2, NLGI Grade 1
GREASENORTH AMERICA
Use the following grease based on the air temperature
range. Operating outside of the recommended grease
air temperature range may cause premature failures.
IMPORTANT: ONLY use a quality grease in this
application. DO NOT mix any other greases in
this application. DO NOT use any BIOGREASE
in this application.
The following John Deere grease is PREFERRED:
NON-CLAY HIGH-TEMPERATURE EP
GREASEJDM J13E4, NLGI Grade 2
Other greases may be used if above preferred John
Deere grease is not available, provided they meet the
following specification:
John Deere Standard JDM J13E4, NLGI Grade 2
JDM J13A2NLGI Grade 1M58275
AIR TEMPERATURE
JDM J13E4M58275
AIR TEMPERATURE
NLGI Grade 2
2 - 18
7/19/99
SPECIFICATIONS AND INFORMATION
OIL AND LUBRICANT SPECIFICATIONS
GREASE EUROPE
Use the following grease based on the air temperature
range. Operating outside of the recommended grease
air temperature range may cause premature failures.
IMPORTANT: ONLY use a quality grease in this
application. DO NOT mix any other greases in
this application. DO NOT use any BIOGREASE
in this application.
The following John Deere grease is PREFERRED:
GREASEGARDJDM J13E4, NLGI Grade 2
Other greases may be used if above preferred John
Deere grease is not available, provided they meet the
following specification:
John Deere Standard JDM J13E4, NLGI Grade 2
ALTERNATIVE LUBRICANTS
Conditions in certain geographical areas outside the
United States and Canada may require different
lubricant recommendations than the ones printed in
this technical manual or the operator's manual. Consult
with your John Deere Dealer, or Sales Branch, to
obtain the alternative lubricant recommendations.
IMPORTANT: Use of alternative lubricants could
cause reduced life of the component.
If alternative
lubricants are to be used,
it
is
recommended that the factory fill be thoroughly
removed before switching to any alternative lubricant.
SYNTHETIC LUBRICANTS
Synthetic lubricants may be used in John Deere
equipment if they meet the applicable performance
requirements (industry classification and/or military
specification) as shown in this manual.
The recommended air temperature limits and service
or lubricant change intervals should be maintained as
shown in the operator's manual.
Avoid mixing different brands, grades, or types of oil.
Oil manufacturers blend additives in their oils to meet
certain specifications and performance requirements.
Mixing different oils can interfere with the proper
functioning of these additives and degrade lubricant
performance.
LUBRICANT STORAGE
All machines operate at top efficiency only when clean
lubricants are used. Use clean storage containers to
handle all lubricants. Store them in an area protected
from dust, moisture, and other contamination. Store
drums on their sides. Make sure all containers are
properly marked as to their contents. Dispose of all old,
used containers and their contents properly.
MIXING OF LUBRICANTS
In general, avoid mixing different brands or types of
lubricants. Manufacturers blend additives in their
lubricants
to meet
certain
specifications and
performance requirements. Mixing different lubricants
can interfere with the proper functioning of these
additives and lubricant properties which will downgrade
their intended specified performance.
JDM J13E4M58275
AIR TEMPERATURE
NLGI Grade 2
7/19/99
2 - 19
OIL AND LUBRICANT SPECIFICATIONS
SPECIFICATIONS AND INFORMATION
OIL FILTERS
IMPORTANT: Filtration of oils is critical to proper
lubrication performance. Always change filters
regularly.
The following John Deere oil filters are PREFERRED:
AUTOMOTIVE AND LIGHT TRUCK ENGINE OIL
FILTERS
Most John Deere filters contain pressure relief and
anti-drainback valves for better engine protection.
Other oil filters may be used if above recommended
John Deere oil filters are not available, provided they
meet the following specification:
ASTB Tested In Accordance With SAE J806
NOTES
2 - 20
7/19/99
ENGINE
CONTENTS
Page
CONTENTS
7/13/99
ENGINE
SPECIFICATIONSFC290V
ENGINE APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
TEST AND ADJUSTMENT SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
REPAIR SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SPECIFICATIONSFB460V
ENGINE APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TEST AND ADJUSTMENT SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
REPAIR SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SPECIFICATIONSBRIGGS & STRATTON
ENGINE APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
TEST AND ADJUSTMENT SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
REPAIR SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
ENGINE COMPONENT LOCATION"K" SERIES FC290V. . . . . . . . . 15
ENGINE COMPONENT LOCATION"K" SERIES FB460V. . . . . . . . . 16
THEORY OF OPERATION"K" SERIES FC290V
GOVERNOR OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
COMPRESSION RELEASE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
LUBRICATION SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
CRANKCASE OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
FUEL/AIR SUPPLY SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
THEORY OF OPERATION"K" SERIES FB460V
GOVERNOR OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
LUBRICATION SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
FUEL/AIR SUPPLY SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
ENGINE SYSTEM DIAGNOSIS"K" SERIES FC290V
WILL NOT START OR STARTS HARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
WILL NOT STAY RUNNING OR RUNS ROUGH. . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
ENGINE PULLS OVER HARD OR RECOIL SNAPS BACK . . . . . . . . . . . . . . . . . . . 32
BLACK SMOKE AT START OR DURING OPERATION . . . . . . . . . . . . . . . . . . . . . . 34
BLUE SMOKE AT START OR DURING OPERATION. . . . . . . . . . . . . . . . . . . . . . . . 36
EXCESSIVE OIL CONSUMPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
ENGINE SURGES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
UNEVEN OR UNCONTROLLED RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
LOW POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3 - 1
CONTENTS CONTINUED
ENGINE
3 - 2
Page
ENGINE SYSTEM DIAGNOSIS"K" SERIES FB460V
WILL NOT START OR STARTS HARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
WILL NOT STAY RUNNING OR RUNS ROUGH . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
ENGINE SPINS OVER HARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
BLACK SMOKE AT START OR DURING OPERATION . . . . . . . . . . . . . . . . . . . . . . 52
BLUE SMOKE AT START OR DURING OPERATION . . . . . . . . . . . . . . . . . . . . . . . 54
EXCESSIVE OIL CONSUMPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
ENGINE SURGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
BACKFIRES AT SHUTDOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
UNEVEN OR UNCONTROLLED RPM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
LOW POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
ENGINE SYSTEM DIAGNOSISBRIGGS & STRATTON
ENGINE WILL NOT START AND HARD TO START, KICKBACK . . . . . . . . . . . . . . 66
LACK OF POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
EXCESSIVE OIL CONSUMPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
TESTS AND ADJUSTMENTS"K" SERIES FC290V
(GX70/GX75/SRX75)
COMPRESSION AND CYLINDER LEAKAGE TEST . . . . . . . . . . . . . . . . . . . . . . . . 72
CRANKCASE VACUUM TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
CARBURETOR SLOW IDLE TEST AND ADJUSTMENT . . . . . . . . . . . . . . . . . . . . 73
GOVERNOR AND FAST IDLE TEST AND ADJUSTMENT . . . . . . . . . . . . . . . . . . . 73
THROTTLE CABLE AND CHOKE ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . 74
VALVE CLEARANCE TEST AND ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . 74
COMPRESSION RELEASE OPERATION TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
TESTS AND ADJUSTMENTS"K" SERIES FB460V (GX95/SRX95)
COMPRESSION AND CYLINDER LEAKAGE TEST . . . . . . . . . . . . . . . . . . . . . . . . 76
CRANKCASE VACUUM TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
CARBURETOR SLOW IDLE TEST AND ADJUSTMENT . . . . . . . . . . . . . . . . . . . . 77
GOVERNOR AND FAST IDLE TEST AND ADJUSTMENT . . . . . . . . . . . . . . . . . . . 77
THROTTLE CABLE AND CHOKE ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . 78
VALVE CLEARANCE TEST AND ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . 78
FUEL PUMP PRESSURE AND FLOW TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
OIL PUMP PRESSURE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
TESTS AND ADJUSTMENTSBRIGGS & STRATTON (GX85/SX85)
CARBURETOR ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
COMPRESSION TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
FUEL PUMP PRESSURE AND FLOW TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
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FUEL AND AIR REPAIRGX70/GX75/SRX75
CARBURETORREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
FUEL FILTERREPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
FUEL SHUT-OFF VALVEREPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
FUEL TANK AND LINESREMOVAL/INSPECTION/INSTALLATION . . . . . . . . . . . 84
THROTTLE CONTROL LEVER AND CABLEREPLACEMENT. . . . . . . . . . . . . . . 84
AIR CLEANER ASSEMBLYREMOVAL/INSTALLATION/INSPECTION . . . . . . . . . 85
BREATHER ASSEMBLYREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . 85
FUEL AND AIR REPAIRGX85/SX85
AIR CLEANER ASSEMBLY REMOVAL/INSPECTION/INSTALLATION . . . . . . . . 86
THROTTLE CONTROL LEVER AND CABLE ASSEMBLY FOR GX85
(S. N. M0GX85X0850001096966) AND SX85 (S. N. M0SX85X085001095909)
REMOVAL/INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
THROTTLE CONTROL LEVER AND CABLE ASSEMBLY FOR GX85
(S.N. M0GX85X0096966) AND SX85 (S. N. M0SX85X095909)
REMOVAL/INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
CARBURETORREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
FUEL PUMPREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
FUEL PUMPDISASSEMBLY/INSPECTION/ASSEMBLY. . . . . . . . . . . . . . . . . . . . 93
FUEL FILTERREPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
BREATHER ASSEMBLYREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . 95
FUEL AND AIR REPAIRGX95/SRX95
FUEL TANKREMOVAL/INSPECTION/INSTALLATION . . . . . . . . . . . . . . . . . . . . . 96
FUEL HOSESREPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
AIR CLEANER ASSEMBLYREMOVAL/INSPECTION/INSTALLATION . . . . . . . . . 96
CARBURETORREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
FUEL PUMPREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
FUEL PUMPDISASSEMBLY/INSPECTION/ASSEMBLY. . . . . . . . . . . . . . . . . . . . 98
FUEL FILTERREPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
THROTTLE CONTROL LEVER AND CABLEREPLACEMENT. . . . . . . . . . . . . . . 99
FUEL TANK AND LINES (GX95)REMOVAL/INSPECTION/INSTALLATION . . . . . 99
THROTTLE CONTROL LEVER AND CABLE (GX95)REPLACEMENT . . . . . . . . 99
BREATHERREMOVAL/INSPECTION/NSTALLATION . . . . . . . . . . . . . . . . . . . . . 100
CARBURETORDISASSEMBLY/CLEANING/INSPECTION/ASSEMBLY. . . . . . . 102
3 - 3
CONTENTS CONTINUED
ENGINE
3 - 4
Page
CARBURETOR REPAIR
FC290V CARBURETOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
FB460V CARBURETOR (WITHOUT FUEL SHUT-OFF SOLENOID) . . . . . . . . . . 104
FB460V CARBURETOR (WITH FUEL SHUTOFF SOLENOID) . . . . . . . . . . . . . . 105
CARBURETOR (BRIGGS & STRATTON)DISASSEMBLY . . . . . . . . . . . . . . . . . 106
CARBURETORCLEANING/INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
CARBURETOR (BRIGGS & STRATTON)ASSEMBLY . . . . . . . . . . . . . . . . . . . . 108
FC290V (GX70/GX75/SRX75)
ENGINEREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
MUFFLER AND SHIELDREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . 111
BLOWER HOUSING (RECOIL STARTER)REMOVAL/INSTALLATION . . . . . . . 112
BLOWER HOUSING (ELECTRIC STARTER)REMOVAL/INSTALLATION . . . . . 112
FLYWHEELREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
ROCKER ARM ASSEMBLYREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . 113
ROCKER ARM ASSEMBLYINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
CYLINDER HEADREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 114
VALVES AND SPRINGSREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . 114
STEM SEALS AND SPRINGSINSPECTION/REPLACEMENT . . . . . . . . . . . . . 115
CYLINDER HEADINSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
VALVE GUIDESINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
VALVE GUIDE BUSHINGSREPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
VALVE SEATSRECONDITIONING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
CHECK VALVE CLEARANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
CRANKCASE COVERREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . 117
CRANKCASE COVEROIL SEAL REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . 117
CAMSHAFTREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
CAMSHAFTINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
CAMSHAFT PLAIN BEARINGSINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . 118
AUTOMATIC COMPRESSION RELEASE (A.C.R.)INSPECTION . . . . . . . . . . . 119
TAPPETSREMOVAL/INSPECTION/INSTALLATION . . . . . . . . . . . . . . . . . . . . . 119
CAMSHAFT AXIAL PLAYADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
PISTON AND CONNECTING RODREMOVAL/INSTALLATION . . . . . . . . . . . . . 120
PISTON AND CONNECTING RODDISASSEMBLY/INSPECTION/ASSEMBLY 120
PISTONINSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
CONNECTING RODINSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
PISTON RINGSREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
CHECK PISTON RING END GAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
RECIPROCATING BALANCERREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . 123
RECIPROCATING BALANCERDISASSEMBLY/ASSEMBLY . . . . . . . . . . . . . . . 123
BALANCER ASSEMBLYINSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
BALANCER BUSHINGSREPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
CRANKSHAFTREMOVAL/INSPECTION/INSTALLATION . . . . . . . . . . . . . . . . . 124
CRANKSHAFT PLAIN BEARINGINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . 125
CRANKSHAFT BALL BEARINGINSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . 125
CRANKSHAFTALIGNMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
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CRANKSHAFT END PLAYMEASUREMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
CRANKSHAFT END PLAYADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
CYLINDER BLOCKINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
REBORE CYLINDER BLOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
OIL SLINGERINSPECTION/REPLACEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . 128
OIL FILTER MANIFOLDREMOVAL/INSPECTION/INSTALLATION. . . . . . . . . . . 128
GOVERNOR ASSEMBLYREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . 128
GOVERNOR SHAFTINSPECTION/REPLACEMENT . . . . . . . . . . . . . . . . . . . . . 129
RECOIL STARTERDISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
RECOIL STARTERINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
SPRINGREPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
RECOIL STARTERASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
FB460V (GX95/SRX95)
ENGINEREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
MUFFLER AND SHIELD (SRX95)REMOVAL/INSTALLATION . . . . . . . . . . . . . . 133
MUFFLER AND SHIELD (GX95)REMOVAL/INSTALLATION . . . . . . . . . . . . . . . 133
BLOWER HOUSING (RECOIL START)REMOVAL/INSTALLATION . . . . . . . . . . 134
BLOWER HOUSING (ELECTRIC START)REMOVAL/INSTALLATION . . . . . . . . 134
FLYWHEEL SCREENADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
FLYWHEELREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
BREATHERREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
CYLINDER HEADREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
CYLINDER HEADINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
VALVES AND SPRINGSREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . 136
VALVE SPRINGS AND GUIDESINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . 136
VALVE GUIDE BUSHINGSREPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
RECONDITION VALVE SEATS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
CHECK VALVE-TO-TAPPET CLEARANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
CRANKCASE COVERREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . 138
CAMSHAFTREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
CAMSHAFTINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
CAMSHAFT PLAIN BEARINGSINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . 139
TAPPETSREMOVAL/INSPECTION/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . 140
PISTON AND CONNECTING RODREMOVAL/INSTALLATION . . . . . . . . . . . . . 140
PISTON AND CONNECTING RODDISASSEMBLY/INSPECTION/ASSEMBLY . 140
PISTON RINGSREMOVAL/INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
CHECK PISTON RING END GAP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
PISTONINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
CONNECTING RODINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
CRANKSHAFTREMOVAL/INSPECTION/INSTALLATION. . . . . . . . . . . . . . . . . . 142
RECIPROCATING BALANCERREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . 143
RECIPROCATING BALANCERDISASSEMBLY/ASSEMBLY . . . . . . . . . . . . . . . 144
BALANCER ASSEMBLYINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
BALANCER BUSHINGSREPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
3 - 5
CONTENTS CONTINUED
ENGINE
3 - 6
Page
FB460V (GX95 AND SRX95)
CRANKSHAFT PLAIN BEARINGINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . 145
CRANKSHAFT BALL BEARINGINSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . 145
CRANKSHAFTALIGNMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
CRANKSHAFT END PLAYMEASUREMENT/ADJUSTMENT . . . . . . . . . . . . . . 146
OIL SEALSINSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
CYLINDER BLOCK STUDSREPLACEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . 147
CYLINDER BLOCKINSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
REBORE CYLINDER BLOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
OIL PUMPDISASSEMBLY/ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
OIL PUMPINSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
OIL FILTER MANIFOLDREMOVAL/INSPECTION/INSTALLATION . . . . . . . . . . 149
GOVERNOR ASSEMBLYREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . 150
GOVERNOR SHAFTINSPECTION/REPLACEMENT. . . . . . . . . . . . . . . . . . . . . 150
BENCH TEST SOLENOID DRIVE STARTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
TEST SOLENOID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
CHECK STARTER ARMATURE ROTATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
TEST STARTER ARMATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
TEST FIELD COIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
BRIGGS & STRATTON (GX85/SX85)
ENGINEREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
MUFFLER AND SHIELDREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . 154
BLOWER HOUSINGREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 154
CYLINDER HEAD AND VALVESREMOVAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
REFACE VALVES AND SEATS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
TAPPET CLEARANCECHECK AND ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . 155
CYLINDER HEAD AND VALVESINSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 156
SERVICE VALVE GUIDES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
SERVICE VALVE SEATS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
FLYWHEELREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
CRANKCASE COVERREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . 159
GOVERNOR ASSEMBLYREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . 159
CAMSHAFT AND TAPPETSREMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . 159
CRANKSHAFT AND COUNTERBALANCE ASSEMBLYREMOVAL . . . . . . . . . 160
CRANKSHAFT AND COUNTERBALANCEINSPECTION . . . . . . . . . . . . . . . . . 160
CRANKSHAFT AND COUNTERBALANCE ASSEMBLYINSTALLATION. . . . . . 160
PISTONREMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
PISTONINSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
MEASURE AND RECONDITION CYLINDER BORE. . . . . . . . . . . . . . . . . . . . . . . 163
MAGNETO AND CRANKCASE COVER BEARINGSREPLACEMENT . . . . . . . 163
REBUSH MAGNETO BEARING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
TEST STARTER MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
STARTER DRIVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
MOTOR REPAIR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
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ENGINE
SPECIFICATIONSFC290V
SPECIFICATIONSFC290V
ENGINE APPLICATIONS
GX70/GX75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FC290V-BS10
SRX75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FC290V-CS10
TEST AND ADJUSTMENT SPECIFICATIONS
Engine:
Crankcase Vacuum
(Minimum at Operating Temp.) . . . . . . . . . . . . . . 7.0 cm (2.8 in.) of Water Movement
Fuel/Air System:
Carburetor Slow Idle Mixture Screw Initial Setting . . . .Lightly Seat, then 1-1/2 Turn Out
Slow Idle Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500 75 rpm
Fast Idle Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3300 50 rpm
REPAIR SPECIFICATIONS
Fuel and Air Systems
Breather:
Maximum Air Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.20 mm (0.008 in.)
Blower Housing and Flywheel:
Flywheel Nut Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Nm (63 lb-ft)
Minimum Flywheel Screen Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.50 mm (0.059 in.)
Cylinder Head and Valves:
Valve Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.15 mm (0.006 in.)
Rocker Arm:
Minimum Shaft OD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.94 mm (0.509 in.)
Maximum Bearing ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.07 mm (0.515 in.)
Push Rod:
Maximum Bend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.30 mm (0.012 in.)
Intake Pushrod Lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.313 mm (0.2092 in.)
(Wear Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.048 mm (0.1987 in.)
Exhaust Pushrod Lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.388 mm (0.2121 in.)
(Wear Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.118 mm (0.2015 in.)
3 - 7
3 - 8
SPECIFICATIONSFC290V
ENGINE
Valves and Springs:
Minimum Spring Free Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.00 mm (1.220 in.)
Valve Guide ID
(Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.000 mm (0.2756 in.)
(Maximum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.015 mm (0.2762 in.)
Intake Valve Stem OD
(Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.960 mm (0.2740 in.)
(Maximum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.975 mm (0.2746 in.)
Intake Valve-to-Guide Clearance
(Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025 mm (0.0010 in.)
(Maximum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.055 mm (0.0022 in.)
Exhaust Valve Stem OD
(Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.950 mm (0.2736 in.)
(Maximum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.965 mm (0.0026 in.)
Exhaust Valve-to-Guide Clearance
(Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.035 mm (0.0014 in.)
(Maximum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.065 mm (0.0026 in.)
Intake Valve Lift (W/Clearance set at 0.00) . . . . . . . . . . . . . . . . . . 6.923 mm(0.2726 in.)
(Wear Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.578 mm(0.2590 in.)
Exhaust Valve Lift (W/Clearance set at 0.00) . . . . . . . . . . . . . . . . 7.021 mm (0.2764 in.)
(Wear Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.670 mm (0.2626 in.)
Maximum Valve Stem Bend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.03 mm (0.001 in.)
Valve Seating Surface . . . . . . . . . . . . . . . . . . . . . . . . 0.501.10 mm (0.0200.043 in.)
Valve Seat and Face Angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Minimum Valve Margin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.60 mm (0.020 in.)
Valve Narrowing Angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Cylinder Head:
Cylinder Head Flatness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05 mm (0.002 in.)
Cap Screw Torque in Sequence (Lubricated)
Initial Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Nm (159 lb-in.)
Final Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Nm (18 lb-ft)
Spark Plug Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Nm (177 lb-in.)
Crankcase Cover:
Oil Capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 L (1.16 qt)
Cap Screw Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Nm (177 lb-in.)
Camshaft:
Minimum End Journal OD
PTO Side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.92 mm (0.548 in.)
Flywheel Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.92 mm (0.627 in.)
Minimum Lobe Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27.08 mm (1.066 in.)
Maximum Bearing ID
Crankcase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.06 mm (0.632 in.)
Oil Pump Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.05 mm (0.553 in.)
Reciprocating Balancer
Link Rod
Minimum Journal OD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46.86 mm (1.845 in.)
Maximum Small End ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.06 mm (0.475 in.)
Maximum Large End ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47.12 mm (0.855 in.)
Bushing Depth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 mm (0.040 in.)
6/29/99
6/29/99
ENGINE
SPECIFICATIONSFC290V
Balancer Weight:
Maximum Bearing ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26.10 mm (1.027 in.)
Support Shaft:
Minimum Shaft OD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25.93 mm (1.021 in.)
Support Shaft Assembly Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3 Nm (65 lb-in.)
Piston:
Maximum Ring Groove Clearance
Top Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.16 mm (0.006 in.)
Second Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.14 mm (0.005 in.)
Oil Control Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.19 mm (0.007 in.)
Minimum Ring End Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.18 mm (0.007 in.)
Maximum Ring End Gap
Compression Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.71 mm (0.028 in.)
Oil Ring Side Rails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.20 mm (0.047 in.)
Minimum Pin OD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18.98 mm (0.747 in.)
Maximum Pin Bore ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.03 mm (0.749 in.)
Maximum Piston-to-Piston Pin Clearance. . . . . . . . . . . . . . . . . . . . . 0.05 mm (0.002 in.)
Piston OD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77.8577.87 mm (3.06493.0657 in.)
Piston-to-Cylinder Bore Clearance . . . . . . . . . . 0.1100.142 mm (0.00430.0056 in.)
Connecting Rod:
Maximum Crankshaft Bearing ID . . . . . . . . . . . . . . . . . . . . . . . . . . 35.57 mm (1.400 in.)
Maximum Piston Pin Bearing ID . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.06 mm (0.750 in.)
Maximum Connecting Rod-to-Piston Pin Clearance. . . . . . . . . . . . . 0.08 mm (0.003 in.)
Maximum Connecting Rod-to-Crankpin Clearance. . . . . . . . . . . . . . 0.14 mm (0.006 in.)
End-Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Nm (177 lb-in.)
Crankshaft:
Minimum PTO Side Journal OD . . . . . . . . . . . . . . . . . . . . . . . . . . . 29.92 mm (1.178 in.)
Minimum Connecting Rod Journal OD . . . . . . . . . . . . . . . . . . . . . . 35.43 mm (1.395 in.)
Maximum Crankcase Cover Plain Bearing ID . . . . . . . . . . . . . . . . . 30.13 mm (1.186 in.)
Maximum T.I.R. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05 mm (0.002 in.)
End Play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.090.22 mm (0.0040.009 in.)
Cylinder Bore:
Standard Cylinder Bore ID . . . . . . . . . . . . . . . . . . 77.9878.00 mm (3.0703.071 in.)
Maximum Cylinder Bore ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78.07 mm (3.074 in.)
Rebore Cylinder:
Oversize Diameter
0.25 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78.2178.23 mm (3.0793.080 in.)
0.50 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78.4678.48 mm (3.0893.090 in.)
0.75 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78.7178.73 mm (3.0993.100 in.)
Ignition Module:
Ignition Coil Air Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.30 mm (0.012 in.)
3 - 9
3 - 10
SPECIFICATIONSFB460V
ENGINE
SPECIFICATIONSFB460V
ENGINE APPLICATIONS
GX95 and SRX95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FB460V-BS25
TEST AND ADJUSTMENT SPECIFICATIONS
Engine:
Oil Pressure (Minimum at 1250 rpm) . . . . . . . . . . . . . . . . . . . . . . . . . . 240 kPa (35 psi)
Crankcase Vacuum
(Minimum at Operating Temp.) . . . . . . . . . . . . . . . 25 cm (9.8 in.) of Water Movement
Fuel/Air System:
Fuel Pump Minimum Fuel Flow. . . . . . . . . . . . . . . . . . . . 90 mL (3.15 oz.) in 10 seconds
Carburetor Slow Idle Mixture Screw Initial Setting . . . .Lightly Seat, then 1-1/8 Turn Out
Slow Idle Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1400 75 rpm
Fast Idle Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3300 50 rpm
REPAIR SPECIFICATIONS
Blower Housing and Flywheel:
Flywheel Nut Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 Nm (65 lb-ft)
Flywheel Screen Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 mm (0.0390.118 in.)
Cylinder Head:
Maximum Cylinder Head Warp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.40 mm (0.015 in.)
Cap Screw Torque in Sequence (Lubricated)
Initial Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Nm (17 lb-ft)
Final Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Nm (27 lb-ft)
Spark Plug Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Nm (18 lb-ft)
Valve Clearance (Cold) . . . . . . . . . . . . . . . . . . . . . . . 0.100.16 mm (0.0040.006 in.)
Valves and Springs:
Minimum Spring Free Length
Intake. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 mm (1.710 in.)
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 mm (1.540 in.)
Maximum Valve Guide ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.08 mm (0.318 in.)
Valve Guide Bushing Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mm (1.178 in.)
Maximum Valve Stem Bend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.03 mm (0.001 in.)
Valve Seat and Face Angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Valve Seating Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.30 mm (0.050 in.)
Valve Margin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.60 mm (0.020 in.)
Valve Narrowing Angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6/29/99
6/29/99
ENGINE
SPECIFICATIONSFB460V
Crankcase Cover:
Oil Capacity
With Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6 L (1.69 qt)
Without Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 L (1.48 qt)
Cap Screw Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Nm (177 lb-in.)
Camshaft:
Minimum End Journal OD
PTO Side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.91 mm (0.784 in.)
Magneto Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.91 mm (0.627 in.)
Minimum Lobe Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35.40 mm (1.395 in.)
Maximum Bearing ID
Crankcase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.07 mm (0.633 in.)
Oil Pump Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20.07 mm (0.790 in.)
Reciprocating Balancer:
Link Rod
Minimum Journal OD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53.95 mm (2.124 in.)
Maximum Small End ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.60 mm (0.475 in.)
Maximum Large End ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54.12 mm (2.132 in.)
Bushing Depth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.50 mm (0.020 in.)
Balancer Weight:
Maximum Bearing ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26.10 mm (1.027 in.)
Support Shaft:
Minimum Shaft OD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25.93 mm (1.021 in.)
Support Shaft Assembly Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3 Nm (65 lb-in.)
Piston:
Maximum Ring Groove Clearance
Top Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.16 mm (0.006 in.)
Second Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.14 mm (0.005 in.)
Oil Control Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.19 mm (0.007 in.)
Minimum Ring End Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.18 mm (0.007 in.)
Maximum Ring End Gap
Compression Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.7 cm (0.028 in.)
Oil Ring Side Rails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.20 mm (0.047 in.)
Minimum Pin OD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20.98 mm (0.827 in.)
Maximum Pin Bore ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21.03 mm (0.829 in.)
Maximum Piston-to-Piston Pin Clearance. . . . . . . . . . . . . . . . . . . . . 0.05 mm (0.002 in.)
Piston OD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88.8188.83 mm (3.49913.4999 in.)
Piston-to-Cylinder Bore Clearance . . . . . . . . . . . . . . . . . . . . . . . . 0.156 mm (0.0061 in.)
Connecting Rod:
Maximum Crankshaft Bearing ID . . . . . . . . . . . . . . . . . . . . . . . . . . 37.02 mm (1.459 in.)
Maximum Piston Pin Bearing ID . . . . . . . . . . . . . . . . . . . . . . . . . . . 21.01 mm (0.829 in.)
Maximum Connecting Rod-to-Piston Pin Clearance. . . . . . . . . . . . . 0.03 mm (0.001 in.)
Maximum Connecting Rod-to-Crankpin Clearance. . . . . . . . . . . . . . 0.09 mm (0.004 in.)
End-Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Nm (177 lb-in.)
3 - 11
3 - 12
SPECIFICATIONSFB460V
ENGINE
Crankshaft:
Minimum PTO Side Journal OD . . . . . . . . . . . . . . . . . . . . . . . . . . . 34.91 mm (1.374 in.)
Minimum Connecting Rod Journal OD . . . . . . . . . . . . . . . . . . . . . . 36.95 mm (1.455 in.)
Maximum Crankcase Cover Plain Bearing ID . . . . . . . . . . . . . . . . . 35.06 mm (1.380 in.)
Maximum T.I.R. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05 mm (0.002 in.)
End Play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.090.22 mm (0.0040.009 in.)
PTO Side Oil Seal:
Depth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.50 mm (0.020 in.)
Cylinder Block:
Crankcase/Block Stud Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Nm (27 lb-ft)
Cylinder Bore:
Standard Cylinder Bore ID . . . . . . . . . . . . . . . . . . 88.9089.00 mm (3.5003.504 in.)
Maximum Cylinder Bore ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89.06 mm (3.506 in.)
Maximum Out-of-Round . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.063 mm (0.0025 in.)
Maximum Taper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.076 mm (0.003 in.)
Rebore Cylinder:
Oversize Diameter
0.25 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89.2189.23 mm (3.5123.513 in.)
0.50 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89.4689.48 mm (3.5223.523 in.)
0.75 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89.7189.73 mm (3.5323.533 in.)
Oil Pump:
Cover Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . 1723 Nm (150204 lb-in.)
Minimum Rotor Shaft ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.63 mm (0.497 in.)
Maximum Rotor Shaft Bearing ID . . . . . . . . . . . . . . . . . . . . . . . . . . 12.76 mm (0.502 in.)
Outer Rotor
Minimum thickness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.92 mm (0.470 in.)
Minimum OD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28.90 mm (1.139 in.)
Outer Rotor Bearing
Maximum Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.14 mm (0.478 in.)
Maximum ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29.15 mm (1.148 in.)
Minimum Valve Spring Free Length . . . . . . . . . . . . . . . . . . . . . . . . 19.00 mm (0.750 in.)
Ignition Module:
Ignition Coil Air Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.30 mm (0.012 in.)
6/29/99
6/29/99
ENGINE
SPECIFICATIONSBRIGGS & STRATTON
SPECIFICATIONSBRIGGS & STRATTON
ENGINE APPLICATIONS
GX85 and SX85 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Briggs & Stratton
TEST AND ADJUSTMENT SPECIFICATIONS
Engine:
Oil Pressure (Minimum at 1250 rpm) . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6 kPa (0.5 psi)
Fuel/Air System:
Fuel Pump Minimum Fuel Flow. . . . . . . . . . . . . . . . . . . . 90 mL (3.15 oz.) in 15 seconds
Carburetor Slow Idle Mixture Screw Initial Setting . . . .Lightly Seat, then 1-1/2 Turn Out
Slow Idle Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15501850 rpm
Fast Idle Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31503450 rpm
REPAIR SPECIFICATIONS
Flywheel Nut Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 Nm (65 lb-ft)
Engine Drive Sheave Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . 73 Nm (54 lb-ft)
Engine-to-Frame Cap Screw Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Nm (35 lb-ft)
Carburetor Mounting Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 Nm (66 lb-in.)
Muffler Mounting Screw Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.5 Nm (137 lb-in.)
Starter Mounting Screw Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Nm (137 lb-in.)
Drain Plug Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Nm (124 lb-in.)
Cylinder Head Cap Screw Torque (Lubricated). . . . . . . . . . . . . . . . . 19 Nm (168 lb-in.)
Spark Plug Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Nm (168 lb-in.)
Crankcase Sump Cover Cap Screw Torque . . . . . . . . . . . . . . . . . . 22.6 Nm (200 lb-in.)
Oil Capacity:
With Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6 L (3.38 pt)
Without Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 L (2.96 pt)
Valves:
Valve Seat and Face Angle (Intake) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Valve Seat and Face Angle (Exhaust). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Valve Seating Width (Min) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.17 mm (0.031 in.)
Valve Seating Width (Max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.17 mm (3/64 in.)
Valve Margin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Greater Than 0.40 mm (1/64 in.)
Valve Narrowing Angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Intake Valve Clearance . . . . . . . . . . . . . . . . . . . . . . . 0.130.18 mm (0.0050.007 in.)
Exhaust Valve Clearance . . . . . . . . . . . . . . . . . . . . . . . . . 0.230.28 (0.0090.011 in.)
Exhaust Guide ID . . . . . . . . . . . . . . . . . . . . . . . 7.9387.963 mm (0.31250.3135 in.)
Intake Guide ID . . . . . . . . . . . . . . . . . . . . . . . . . 7.9127.938 mm (0.31150.3125 in.)
Intake and Exhaust Valve Stem Dia. . . . . . . . . . . . 7.8487.874 mm (0.3090.310 in.)
3 - 13
3 - 14
SPECIFICATIONSBRIGGS & STRATTON
ENGINE
Camshaft:
Minimum Journal OD (Rejection Size) . . . . . . . . . . . . . . . . . . . . . . 12.65 mm (0.498 in.)
Maximum Bearing ID (Rejection Size) . . . . . . . . . . . . . . . . . . . . . . 12.80 mm (0.504 in.)
PTO Bearing ID (Standard Size) . . . . . . . . . . . . . . 12.7312.75 mm (0.5010.502 in.)
Lobe Height (Rejection Size) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30.08 mm (1.184 in.)
Counterbalance:
Eccentric (Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55.93 mm (2.202 in.)
Bearing (Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56.18 mm (2.212 in.)
Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Nm (115 lb-in.)
Piston:
Ring-to-Land Clearance (Rejection) . . . . . . . . . . . . . . . . . . . . . . . 0.317 mm (0.0125 in.)
Ring End Gap Top and Center (Rejection) . . . . . . . . . . . . . . . . . . . . 0.76 mm (0.030 in.)
Ring End Gap Oil Control (Reject) . . . . . . . . . . . . . . . . . . . . . . . . . . 0.89 mm (0.035 in.)
Piston Pin ID Reject Size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20.307 mm (0.7995 in.)
Piston Pin Bearing ID Rejection Size. . . . . . . . . . . . . . . . . . . . . . 20.409 mm (0.8035 in.)
Max. Bore Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87.313 mm (3.4375 in.)
Upper Bore OD Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (1.6825 in.)
Upper Crankshaft Seal Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (1.691 in.)
Connecting Rod:
Crankpin Bearing ID Reject Size. . . . . . . . . . . . . . . . . . . . . . . . . . . 31.80 mm (1.252 in.)
Crankpin Bearing ID Standard Size. . . . . . . . 31.75031.763 mm (1.25001.2505 in.)
Piston Pin Bearing ID Reject Size. . . . . . . . . . . . . . . . . . . . . . . . . . 20.37 mm (0.802 in.)
Piston Pin Bearing ID Standard Size. . . . . . . 20.33520.350 mm (0.80060.8012 in.)
End-Cap Screw Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20.91 Nm (185 lb-in.)
Undersize Connecting Rod Crankpin Grinding Dimensions:
Crankpin Diameter . . . . . . . . . . . . . . . . . . . . 31.22431.214 mm (1.22931.2289 in.)
Fillet Radius . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.303.05 mm (0.1300.120 in.)
Crankshaft Throw . . . . . . . . . . . . . . . . . . . . . 33.38833.287 mm (1.31451.3105 in.)
Crankshaft:
Main Bearing ID (Magneto Side) Rejection Size . . . . . . . . . . . . . . 35.13 mm (1.383 in.)
Main Bearing ID (PTO Side) Rejection Size . . . . . . . . . . . . . . . . . . 35.26 mm (1.388 in.)
Minimum Connecting Rod Journal OD Rejection Size.. . . . . . . . . . 31.67 mm (1.247 in.)
Journal OD (Magneto and PTO Side) Rejection Size . . . . . . . . . . 34.95 mm (1.376 in.)
End Play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.0510.762 mm (0.0020.030 in.)
Ignition Module:
Ignition Coil Air Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.30 mm (0.012 in.)
6/29/99
ENGINE
ENGINE COMPONENT LOCATION"K" SERIES FC290V
ENGINE COMPONENT LOCATION"K" SERIES FC290V
M49460
Valve
Piston
Connecting Rod
Crankshaft
Balancer
Balancer Pin
Connecting Rod
Rocker Arm
Cylinder Head
Pushrod
Tappet
Camshaft
Blower Housing
Fins
Flywheel W/Fan
Cooling Fan
6/29/99
3 - 15
ENGINE COMPONENT LOCATION"K" SERIES FB460V
ENGINE
ENGINE COMPONENT LOCATION"K" SERIES FB460V
M49623
Flywheel W/Fan
Crankshaft
Fins
Blower Housing
Crankshaft Journal
Piston
Valves
Cylinder Head
Block
Tappets
Camshaft
Balancer Pin
Balancer
Balancer Connecting Rod
Cooling Fan
3 - 16
6/29/99
ENGINE
THEORY OF OPERATION"K" SERIES FC290V
THEORY OF OPERATION"K" SERIES FC290V
GOVERNOR OPERATION
M49461
Linkage
Throttle Lever
Carburetor
Camshaft Gear
Flyweights
Governor Gear
Shaft
Throttle Cable
Spool
Lever
Spring
Governor
Control
Panel

Theory of Operation:
The governor system senses the engine rpms by the
position of the flyweights. These flyweights are rotated
by the governor gear that is driven by the camshaft
gear. The flyweights press against spool that rotates
the shaft and lever. This lever is connected to the
throttle lever of the carburetor by linkage. As engine
rpms increase, the movement of the flyweights tries to
close the throttle valve. This movement is opposed by a
spring at the control panel. The tension of this spring
can be changed by changing the position of the throttle
cable. As the throttle is advanced, the tension of the
spring is increased and the governed rpms increase.
The maximum rpm is controlled by a stop on the
control panel. As the load on the engine increases, the
rpms will drop. This allows the spring to pull on the
linkage and open the throttle valve that increases the
power and raises the rpms. When the load decreases,
the rpms increase, which causes the flyweights to
move the linkage and close the throttle valve. The
power is lowered and the rpms drop. The chosen rpm
is maintained by the balancing of the forces of the
flyweights and the spring.
6/29/99
3 - 17
THEORY OF OPERATION"K" SERIES FC290V
ENGINE
COMPRESSION RELEASE OPERATION
M49467
Push Rod
Exhaust Valve Tappet
Tab
Camshaft Gear
Weight
Spring
Camshaft

Theory of Operation:
The compression release on this engine consists of a
release tab, weight and spring that are mounted on
gear of the camshaft The release tab holds the exhaust
valve tappet and push rod off its seat during a portion
of the compression stroke. The release tab is
connected to the weight and the spring holds the
weight in at low rpms. As the engine starts and the
rpms increase, the weight overcomes the spring and
moves out. As it moves out, the release tab moves in
until it clears the valve tappet. The exhaust valve seats
properly and full compression is obtained. Valve lash is
important for correct operation. Too much lash and
compression will be high; too little and compression will
be low.
3 - 18
6/29/99
ENGINE
THEORY OF OPERATION"K" SERIES FC290V
LUBRICATION SYSTEM OPERATION
M49468
Paddles
Balancer
Balancer Pin
Crankshaft
Camshaft
Breather
Tappets
Head
Rocker Arms
Valves
Piston
Connecting Rod Journal
Main Bearings
Balancer Connecting Rods
Oil Slinger
Passage
Gear
Theory of Operation:

The lubrication of the internal components of the
engine is from splashed oil or oil-laden air. The piston,
connecting rod journal, crankshaft main bearings,
balancer rods and balancer pin are lubricated by
splashed oil. Oil is splashed around the crankcase by
the paddles on the oil slinger gear. The slinger gear is
driven by the governor gear. During operation, the air in
the crankcase becomes very oily. This air travels out
the breather passage into the head. This oil/air mixture
lubricates the rocker arms and valves. Lubrication of
the camshaft and tappets is by splash.
6/29/99
3 - 19
THEORY OF OPERATION"K" SERIES FC290V
ENGINE
CRANKCASE OPERATION
M49469
Breather Passage
Head
Maze
Tube
Reed Valve
Oil Laden Air
Return Hole

Theory of Operation:
The breather consists of a reed valve that controls the
flow of air out of and into the crankcase. As the piston
moves in during power and intake strokes, the volume
in the crankcase decreases. To prevent a build-up of
pressure, oil-laden air is allowed to freely flow out
through the breather passage, past the reed valve into
the head. In the head some of the oil separates from
the air and returns to the crankcase through the return
hole. The air then passes into the maze. In the maze
more oil separates from the air and also returns
through the return hole. The air then passes through a
tube which connects to the air cleaner housing of the
carburetor. The air is routed to burn oil vapors and keep
them out of the atmosphere. As the crankshaft
continues to rotate and the piston goes out for
compression or exhaust strokes, the volume in the
crankcase increases and the air that was let out tries to
get back in. But the reed valve is now closed and the
return hole is below the level of the oil in the crankcase
so only a small amount of air can get back in through
the return hole. A vacuum is created.
3 - 20
6/29/99
ENGINE
THEORY OF OPERATION"K" SERIES FC290V
FUEL/AIR SUPPLY SYSTEM OPERATION
M49480
Tank Cap
Fuel Tank
Fuel Pick Up
Valve
Fuel Filter
Air Filter
Carburetor
Fuel Line

Function:
Under a variety of conditions, supplies the correct
amount of fuel and air to the engine to allow it to run.
Theory of Operation:
The fuel supply for this engine is a gravity-feed type.
Fuel flows from the tank through the fuel filter and fuel
shutoff valve to the carburetor where it is metered to
supply the correct amount for the various operating
conditions. The vent for the fuel tank is a notch in the
threads of the fuel tank cap.
The air supply is drawn into the air filter housing
through the air filter elements. This filter is a two-stage
design consisting of a paper element and a foam
element. The air inlet to the filter housing is connected
to the engine fan shroud so the air supplied to the
carburetor is controlled by the engine cooling fan. Any
blockage of the air flow on the fins of the engine will
alter the air supply to the carburetor and can change
engine performance and operation.
6/29/99
3 - 21
THEORY OF OPERATION"K" SERIES FB460V
ENGINE
THEORY OF OPERATION"K" SERIES FB460V
GOVERNOR OPERATION
M49624
Linkage
Lever
Spring
Governor
Control
Panel
Spool
Shaft
Throttle Cable
Flyweights
Governor
Gear
Camshaft Gear
Carburetor
Throttle
Lever

Theory of Operation:
The governor system senses engine rpms by the
position of the flyweights. These flyweights are rotated
by the governor gear that is driven by the camshaft
gear. The flyweights press against spool that rotates
the shaft and lever. This lever is connected to the
throttle lever of the carburetor by linkage. As engine
rpms increase, the movement of the flyweights tries to
close the throttle valve. This movement is opposed by
spring at the control panel. The tension of this spring
can be changed by changing the position of the throttle
cable.
As the throttle is advanced, the tension of the spring is
increased and the governed rpms increase. The
maximum rpm is controlled by a stop on the control
panel. As the load on the engine increases, the rpms
will drop. This allows the spring to pull on the linkage
and open the throttle valve that increases the power
and raises the rpms. When the load decreases, the
rpms increase causes the flyweights to move the
linkage and close the throttle valve. The power is
lowered and the rpms drop. The chosen rpm is
maintained by the balancing of the forces of the
flyweights and the spring.
3 - 22
6/29/99



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