Briggs & Stratton is a registered trademark
of Briggs & Stratton Corporation
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E 2009 Briggs & Stratton Corporation,
Milwaukee, WI, USA. All rights reserved.
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Form No. 277614TRI
Revision: B
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Not for Reproduction
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BRIGGSandSTRATTON.COM
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Not for Reproduction
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General Information
Not for Reproduction
For replacement parts or technical assistance, record below the engine model, type, and
code numbers along with the date of purchase. These numbers are located on your
engine (see the Features and Controls page).
Date of purchase:
MM/DD/YYYY
Engine model:
Model:Code:Type:
Engine Power Rating Information
The gross power rating for individual gas engine models is labeled in accordance with
SAE (Society of Automotive Engineers) code J1940 (Small Engine Power & Torque
Rating Procedure), and rating performance has been obtained and corrected in
accordance with SAE J1995 (Revision 2002-05). Torque values are derived at 3060
RPM; horsepower values are derived at 3600 RPM. Actual gross engine power will be
lower and is affected by, among other things, ambient operating conditions and
engine-to-engine variability. Given both the wide array of products on which engines are
placed and the variety of environmental issues applicable to operating the equipment,
the gas engine will not develop the rated gross power when used in a given piece of
power equipment (actual “on-site” or net power). This difference is due to a variety of
factors including, but not limited to, accessories (air cleaner, exhaust, charging, cooling,
carburetor, fuel pump, etc.), application limitations, ambient operating conditions
(temperature, humidity, altitude), and engine-to-engine variability. Due to manufacturing
and capacity limitations, Briggs & Stratton may substitute an engine of higher rated
power for this Series engine.
Operator Safety
SAFETY AND CONTROL SYMBOLS
Fire
Fast
Choke
Hazardous
Chemical
The safety alert symbolis used to identify safety information about hazards that can
result in personal injury. A signal word (DANGER, WARNING, or CAUTION) is used with the
alert symbol to indicate the likelihood and the potential severity of injury. In addition, a hazard
symbol may be used to represent the type of hazard.
Moving Parts
Stop
On Off
Read Manual
Oil
Explosion
Fuel Shutoff
Hot Surface
Toxic Fumes
Shock
Kickback
Frostbite
Slow
Fuel
Wear Eye
Protection
WARNING
The engine exhaust from this product contains chemicals known to the State of
California to cause cancer, birth defects, or other reproductive harm.
WARNING
Briggs & Stratton does not approve or authorize the use of these engines on 3-wheel
All Terrain Vehicles (ATVs), motor bikes, fun/recreational go-karts, aircraft products,
or vehicles intended for use in competitive events. Use of these engines in such
applications could result in property damage, serious injury (including paralysis), or
even death.
NOTICE: This engine was shipped from Briggs & Stratton without oil. Before you start
the engine, make sure you add oil according to the instructions in this manual. If you
start the engine without oil, it will be damaged beyond repair and will not be covered
under warranty.
WARNING
Gasoline and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
When Adding Fuel
• Turn engine off and let engine cool at least 2 minutes before removing the fuel
cap.
• Fill fuel tank outdoors or in well-ventilated area.
• Do not overfill fuel tank. To allow for expansion of the gasoline, do not fill above
the bottom of the fuel tank neck.
• Keep gasoline away from sparks, open flames, pilot lights, heat, and other
ignition sources.
• Check fuel lines, tank, cap, and fittings frequently for cracks or leaks.
Replace if necessary
• If fuel spills, wait until it evaporates before starting engine.
When Starting Engine
• Ensure that spark plug, muffler, fuel cap and air cleaner (if equipped) are in
place and secured.
• Do not crank engine with spark plug removed.
• If engine floods, set choke (if equipped) to OPEN/RUN position, move throttle
(if equipped) to FAST position and crank until engine starts.
When Operating Equipment
• Do not tip engine or equipment at angle which causes gasoline to spill.
• Do not choke the carburetor to stop engine.
• Never start or run the engine with the air cleaner assembly (if equipped) or the
air filter (if equipped) removed.
When Changing Oil
• If you drain the oil from the top oil fill tube, the fuel tank must be empty or fuel
can leak out and result in a fire or explosion.
When Transporting Equipment
• Transport with fuel tank EMPTY or with fuel shut-off valve OFF.
When Storing Gasoline Or Equipment With Fuel In Tank
• Store away from furnaces, stoves, water heaters or other appliances that have
pilot light or other ignition source because they can ignite gasoline vapors.
DANGER indicates a hazard which, if not avoided, will result in death or
serious injury.
WARNING indicates a hazard which, if not avoided, could result in death or
serious injury.
CAUTION indicates a hazard which, if not avoided, could result in minor or
moderate injury.
WARNING
Starting engine creates sparking.
Sparking can ignite nearby flammable gases.
Explosion and fire could result.
• If there is natural or LP gas leakage in area, do not start engine.
• Do not use pressurized starting fluids because vapors are flammable.
NOTICE indicates a situation that could result in damage to the product.
WARNING
Engines give off carbon monoxide, an odorless, colorless, poison gas.
WARNING
Certain components in this product and its related accessories contain chemicals
known to the State of California to cause cancer, birth defects, or other reproductive
harm. Wash hands after handling.
4BRIGGSandSTRATTON.COM
Breathing carbon monoxide can cause nausea, fainting or death.
• Start and run engine outdoors.
• Do not start or run engine in enclosed area, even if doors or windows are open.
WARNING
Not for Reproduction
Rapid retraction of starter cord (kickback) will pull hand and arm
toward engine faster than you can let go.
Broken bones, fractures, bruises or sprains could result.
• When starting engine, pull the starter cord slowly until resistance is felt and then
pull rapidly to avoid kickback.
• Remove all external equipment/engine loads before starting engine.
• Direct-coupled equipment components such as, but not limited to, blades,
impellers, pulleys, sprockets, etc., must be securely attached.
WARNING
Rotating parts can contact or entangle hands, feet, hair, clothing, or
accessories.
Traumatic amputation or severe laceration can result.
• Operate equipment with guards in place.
• Keep hands and feet away from rotating parts.
• Tie up long hair and remove jewelry.
• Do not wear loose-fitting clothing, dangling drawstrings or items that could
become caught.
WARNING
Running engines produce heat. Engine parts, especially muffler,
become extremely hot.
Severe thermal burns can occur on contact.
Combustible debris, such as leaves, grass, brush, etc. can catch fire.
• Allow muffler, engine cylinder and fins to cool before touching.
• Remove accumulated debris from muffler area and cylinder area.
• It is a violation of California Public Resource Code, Section 4442, to use or
operate the engine on any forest-covered, brush-covered, or grass-covered land
unless the exhaust system is equipped with a spark arrester, as defined in
Section 4442, maintained in effective working order. Other states or federal
jurisdictions may have similar laws. Contact the original equipment
manufacturer, retailer, or dealer to obtain a spark arrester designed for the
exhaust system installed on this engine.
WARNING
Unintentional sparking can result in fire or electric shock.
Unintentional start-up can result in entanglement, traumatic
amputation, or laceration.
Fire hazard
Before performing adjustments or repairs:
• Disconnect the spark plug wire and keep it away from the spark plug.
• Disconnect battery at negative terminal (only engines with electric start.)
• Use only correct tools.
• Do not tamper with governor spring, links or other parts to increase engine
speed.
• Replacement parts must be the same and installed in the same position as the
original parts.
• Do not strike the flywheel with a hammer or hard object because the flywheel
may later shatter during operation.
When testing for spark:
• Use approved spark plug tester.
• Do not check for spark with spark plug removed.
en
5
Features and Controls
Not for Reproduction
Compare the illustration
various features and controls.
A. Engine Identification
Model Type Code
B. Spark Plug
C. Choke Control
D. Starter Cord Handle
E. Oil Fill Cap
F. Dipstick/Oil Fill
G. Oil Drain Plug
H. Muffler
Muffler Guard (optional)
Muffler Deflector
I. Push Button Electric Start
J. Power Cord Receptacle
K. Electric Starter
L. Carburetor
1
with your engine to familiarize yourself with the location of
Operation
Oil capacity (see the Specifications section)
Oil Recommendations
We recommend the use of Briggs & Stratton Warranty Certified oils for best
performance. Other high-quality detergent oils are acceptable if classified for service SF,
SG, SH, SJ or higher. Do not use special additives.
Outdoor temperatures determine the proper oil viscosity for the engine. Use the chart to
select the best viscosity for the outdoor temperature range expected.
°F°C
SAE 30
10W-30
Synthetic 5W-30
5W-30
CAUTION: Do not use unapproved gasolines, such as E85. Do not mix oil in gasoline or
modify the engine to run on alternate fuels. This will damage the engine components and
void the engine warranty.
To protect the fuel system from gum formati on, mix a fuel stabilizer into the fuel. See
Storage. All fuel is not the same. If starting or performance problems occur, change fuel
providers or change brands. This engine is certified to operate on gasoline. The
emissions control system for this engine is EM (Engine Modifications).
High Altitude
At altitudes over 5,000 feet (1524 meters), a minimum 85 octane/85 AKI (89 RON)
gasoline is acceptable. To remain emissions compliant, high altitude adjustment is
required. Operation without this adjustment will cause decreased performance,
increased fuel consumption, and increased emissions. See a Briggs & Stratton
Authorized Dealer for high altitude adjustment information.
Operation of the engine at altitudes below 2,500 feet (762 meters) with the high altitude
kit is not recommended.
How To Add Fuel - Figure
4
WARNING
Gasoline and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
When Adding Fuel
• Turn engine off and let engine cool at least 2 minutes before removing the fuel
cap.
• Fill fuel tank outdoors or in well-ventilated area.
• Do not overfill fuel tank. To allow for expansion of the gasoline, do not fill above
the bottom of the fuel tank neck.
• Keep gasoline away from sparks, open flames, pilot lights, heat, and other
ignition sources.
• Check fuel lines, tank, cap, and fittings frequently for cracks or leaks.
Replace if necessary
• If fuel spills, wait until it evaporates before starting engine.
1. Clean the fuel cap area of dirt and debris. Remove the fuel cap (A) (Figure 4).
2. Fill the fuel tank (B) with gasoline. To allow for expansion of the gasoline, do not fill
above the bottom of the fuel tank neck (C).
3. Reinstall the fuel cap.
How To Start The Engine - Figure
56
WARNING
Rapid retraction of starter cord (kickback) will pull hand and arm
toward engine faster than you can let go.
* Below 40°F(4°C) the use of SAE 30 will result in hard starting.
** Above 80°F(27°C) the use of 10W-30 may cause increased oil consumption. Check
oil level more frequently.
How To Check/Add Oil - Figure
Before adding or checking the oil
• Place engine level.
• Clean the oil fill area of any debris.
Models with oil fill cap (Figure 2)
1. Remove the oil fill cap (A).
2. To add oil, pour the oil slowly into the engine oil fill (B). Fill to point of overflowing.
3. Replace and tighten the oil fill cap.
Models with extended dipstick (Figure 3)
1. Remove the dipstick (C) and wipe with a clean cloth.
2. Insert and tighten the dipstick.
3. Remove the dipstick and check the oil level. It should be at the top of the full indicator
(D) on the dipstick.
4. To add oil, pour the oil slowly into the engine oil fill (B). Do not overfill. After adding
oil, wait one minute and then recheck the oil level.
5. Replace and tighten the dipstick.
23
Broken bones, fractures, bruises or sprains could result.
• When starting engine, pull the starter cord slowly until resistance is felt and then
pull rapidly to avoid kickback.
• Remove all external equipment/engine loads before starting engine.
• Direct-coupled equipment components such as, but not limited to, blades,
impellers, pulleys, sprockets, etc., must be securely attached.
WARNING
Gasoline and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
When Starting Engine
• Ensure that spark plug, muffler, fuel cap and air cleaner (if equipped) are in
place and secured.
• Do not crank engine with spark plug removed.
• If engine floods, set choke (if equipped) to OPEN/RUN position, move throttle
(if equipped) to FAST position and crank until engine starts.
WARNING
Fuel Recommendations
Fuel must meet these requirements:
• Clean, fresh, unleaded gasoline.
• A minimum of 87 octane/87 AKI (91 RON). High altitude use, see below.
• Gasoline with up to 10% ethanol (gasohol) or up to 15% MTBE (methyl tertiary
butyl ether) is acceptable.
6BRIGGSandSTRATTON.COM
Engines give off carbon monoxide, an odorless, colorless, poison gas.
Breathing carbon monoxide can cause nausea, fainting or death.
• Start and run engine outdoors.
• Do not start or run engine in enclosed area, even if doors or windows are open.
WARNING
Not for Reproduction
Unintentional sparking can result in fire or electric shock.
Unintentional start-up can result in entanglement, traumatic
amputation, or laceration.
Fire hazard
Maintenance
Use only original equipment replacement parts. Other parts may not perform as
well, may damage the unit, and may result in injury. In addition, use of other parts
may void your warranty.
We recommend that you see any Briggs & Stratton Authorized Dealer for all
maintenance and service of the engine and engine parts.
NOTICE: All the components used to build this engine must remain in place for proper
operation.
• Usea3-wireextensioncord.
• First attach extension cord to electric starter connector and then into a wall
receptacle. If additional extension cord is required, use a 3-wire.
• If the supply cord is damaged, it must be replaced by the manufacturer or its
service agent or a similarly qualified person in order to avoid a hazard.
NOTICE: This engine was shipped from Briggs & Stratton without oil. Before you start
the engine, make sure you add oil according to the instructions in this manual. If you
start the engine without oil, it will be damaged beyond repair and will not be covered
under warranty.
Note: Some engines and equipment have remote controls. See the equipment manual
for location and operation of remote controls.
1. Check the oil level. See the How To Check/Add Oil section.
2. Make sure equipment drive controls, if equipped, are disengaged.
3. Turn the fuel shut-off valve, if equipped, to the on position.
4. Turn on the equipment switch (either a rocker (A)orakey(B) switch). See Figure 5.
5. Turn the choke control (C) to the choke
Note: Choke is usually unnecessary when restarting a warm engine.
6. Push the primer (D)twotimes.
Note: Priming is usually unnecessary when restarting a warm engine.
7. Rewind Start: Firmly hold the starter cord handle (E). Pull the starter cord handle
slowly until resistance is felt, then pull rapidly.
Note: If the engine does not start after repeated attempts, go to
BRIGGSandSTRATTON.COM or call 1-800-233-3723 (in USA).
position.
Emissions Control
Maintenance, replacement, or repair of the emissions control devices and systems
may be performed by any non-road engine repair establishment or individual.
However, to obtain “no charge” emissions control service, the work must be performed
by a factory authorized dealer. See the Emissions Warranty.
WARNING
Unintentional sparking can result in fire or electric shock.
Unintentional start-up can result in entanglement, traumatic
amputation, or laceration.
Fire hazard
Before performing adjustments or repairs:
• Disconnect the spark plug wire and keep it away from the spark plug.
• Use only correct tools.
• Do not tamper with governor spring, links or other parts to increase engine
speed.
• Replacement parts must be the same and installed in the same position as the
original parts.
• Do not strike the flywheel with a hammer or hard object because the flywheel
may later shatter during operation.
When testing for spark:
• Use approved spark plug tester.
• Do not check for spark with spark plug removed.
WARNING: Rapid retraction of the starter cord (kickback) will pull your
hand and arm toward the engine faster than you can let go. Broken bones, fractures,
bruises or sprains could result. When starting engine, pull the starter cord slowly until
resistance is felt and then pull rapidly to avoid kickback.
8. Electric Start: First connect the extension cord to the power cord receptacle (F,
Figure 6) and then into a wall receptacle. If an additional extension cord is required,
make sure it is a 3-wire.
WARNING: If the extension cord is damaged, it must be replaced by the
manufacturer or its service agent or a similarly qualified person in order to avoid a
hazard.
9. Electric Start: Depress the push button (G). After the engine starts, first disconnect
the extension cord from the wall receptacle and then from the power cord receptacle
(F).
Note: If the engine does not start after repeated attempts, go to
BRIGGSandSTRATTON.COM or call 1-800-233-3723 (in USA).
NOTICE: To extend the life of the starter, use short starting cycles (five seconds
maximum). Wait one minute between starting cycles.
10. Allow the engine to warm up for several minutes. Then, slowly move the choke
control to the run
position.
Maintenance Chart
First 5 Hours
• Change oil
Every8HoursorDaily
• Check engine oil level
Every 50 Hours or Annually
• Change engine oil
• Check muffler and muffler guard
Annually
• Replace spark plug
• Replace fuel filter (if equipped)
• Check valve clearance **
** Not required unless engine performance problems are noted.
Carburetor Adjustment
Never make adjustments to the carburetor. The carburetor was set at the factory to
How To Stop The Engine - Figure
5
WARNING
Gasoline and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
• Do not choke the carburetor to stop engine.
1. Turn off the equipment switch (either a rocker (A)orakey(B) switch). See Figure 5.
2. After the engine stops, turn the fuel shut-off valve, if equipped, to the closed position.
en
operate efficiently under most conditions. However, if adjustments are required, see any
Briggs & Stratton Authorized Dealer for service.
NOTICE: The manufacturer of the equipment on which this engine is installed specifies
the top speed at which the engine will be operated. Do not exceed this speed.
How To Replace The Spark Plug - Figure
Check the gap (A, Figure 7) with a wire gauge (B). If necessary, reset the gap. Install
and tighten the spark plug to the recommended torque. For gap setting or torque, see the
Specifications section.
Note: In some areas, local law requires using a resistor spark plug to suppress ignition
signals. If this engine was originally equipped with a resistor spark plug, use the same
type for replacement.
7
7
Inspect Muffler And Spark Arrester - Figure
Not for Reproduction
8
WARNING
Running engines produce heat. Engine parts, especially muffler,
become extremely hot.
Severe thermal burns can occur on contact.
Combustible debris, such as leaves, grass, brush, etc. can catch fire.
• Allow muffler, engine cylinder and fins to cool before touching.
• Remove accumulated debris from muffler area and cylinder area.
• It is a violation of California Public Resource Code, Section 4442, to use or
operate the engine on any forest-covered, brush-covered, or grass-covered land
unless the exhaust system is equipped with a spark arrester, as defined in
Section 4442, maintained in effective working order. Other states or federal
jurisdictions may have similar laws. Contact the original equipment
manufacturer, retailer, or dealer to obtain a spark arrester designed for the
exhaust system installed on this engine.
Inspect the muffler (A, Figure 8) f or cracks, corrosion, or other damage. Remove the
muffler deflector (B), if equipped, and inspect for damage or carbon blockage. If
replacement parts are required, make sure to use only original equipment replacement
parts.
WARNING: Replacement parts must be the same and installed in the
same position as the original parts or fire could result.
Storage
WARNING
Gasoline and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
When Storing Gasoline Or Equipment With Fuel In Tank
• Store away from furnaces, stoves, water heaters or other appliances that have
pilot lights or other ignition sources because they can ignite gasoline vapors.
Fuel System
Fuel can become stale when stored over 30 days. Stale fuel causes acid and gum
deposits to form in the fuel system or on essential carburetor parts. To keep fuel fresh,
use Briggs & Stratton FRESH START
drip concentrate cartridge.
There is no need to drain gasoline from the engine if a fuel stabilizer is added according
to instructions. Run the engine for 2 minutes to circulate the stabilizer throughout the fuel
system. The engine and fuel can then be stored up to 24 months.
If gasoline in the engine has not been treated with a fuel stabilizer, it must be drained into
an approved container. Run the engine until it stops from lack of fuel. The use of a fuel
stabilizer in the storage container is recommended to maintain freshness.
Engine Oil
While the engine is still warm, change the engine oil.
®
fuel stabilizer, available as a liquid additive or a
Troubleshooting
Need Assistance? Go to BRIGGSandSTRATTON.COM or call 1-800-233-3723.
Air F ilter
This engine is not equipped with an air filter. DO NOT use this engine for anything
other than snow removal.
Specifications
Engine Specifications
How To Change The Oil - Figure
Used oil is a hazardous waste product and must be disposed of properly. Do not discard
with household waste. Check with your local authorities, service center, or dealer for safe
disposal/recycling facilities.
239
Remove Oil
1. With engine off but still warm, disconnect the spark plug wire (A, Figure 9) and keep
it away from the spark plug.
2. Remove the oil drain plug ( E, Figure 2). Drain the oil into an approved receptacle.
Note: Any of the oil drain plugs (F) shown may be installed in the engine.
3. After the oil has drained, install and tighten the oil drain plug.
Add oil
• Place engine level.
• Clean the oil fill area of any debris.
• See the Specifications section for oil capacity.
Models with oil fill cap
1. Remove the oil fill cap (A, Figure 2).
2. Pour the oil slowly into the engine oil fill (B). Fill to point of overflowing.
3. Replace and tighten the oil fill cap.
Models with extended dipstick
1. Remove the dipstick (C, Figure 3) and wipe with a clean cloth.
2. Pour the oil slowly into the engine oil fill (B). Do not overfill. After adding oil, wait
one minute and then recheck the oil level.
3. Install and tighten the dipstick.
4. Remove the dipstick and check the oil level. It should be at the top of the full indicator
(D) on the dipstick.
5. Install and tighten the dipstick.
8
Model90000
Displacement9.02 ci (148 cc)
Bore2.562 in (65.08 mm)
Stroke1.750 in (44.45 mm)
Oil Capacity18 -- 20 oz (0.54 -- 0.59 L)
Tune-up Specifications *
Model90000
Spark Plug Gap0.030 in (0.76 mm)
Spark Plug Torque180 lb-in (20 Nm)
Armature Air Gap0.006 - 0.010 in (0.15 - 0.25 mm)
Intake Valve Clearance0.005 - 0.007 in (0.13 - 0.18 mm)
Exhaust Valve Clearance0.007 - 0.009 in (0.18 - 0.23 mm)
* Engine power will decrease 3.5% for each 1,000 feet (300 meters) above sea level and
1% for each 10° F(5.6° C) above 77° F(25° C). The engine will operate satisfactorily at
an angle up to 15°. Refer to the equipment operator’s manual for safe allowable
operating limits on slopes.
Common Service Parts n
Service PartPart Number
Fuel Additive5041, 5058
Resistor Spark Plug802592
Long Life Platinum Spark Plug5062
Spark Plug Wrench89838, 5023
Spark Tester19368
n We recommend that you see any Briggs & Stratton Authorized Dealer for all
maintenance and service of the engine and engine parts. Use only genuine Briggs &
Stratton parts.
BRIGGSandSTRATTON.COM
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