Briggs & Stratton 080000 User manual

Not for
Reproduction
Copyright © Briggs & Stratton Corporation
Milwaukee, WI, USA. All rights reserved. 80088261
Revision: A

Not for
Reproduction
2 BRIGGSandSTRATTON.com
1
2
3
4
5
6
7
8
9
10

Not for
Reproduction
3
11
12
13
14
15
16
17
18
19
20

Not for
Reproduction
4 BRIGGSandSTRATTON.com
Copyright © Briggs & Stratton Corporation, Milwaukee, WI, USA. All rights reserved.
This manual contains safety information to make you aware of the hazards and risks
associated with engines and how to avoid them. It also contains instructions for the
proper use and care of the engine. Because Briggs & Stratton Corporation does not
necessarily know what equipment this engine will power, it is important that you read
and understand these instructions and the instructions for the equipment.Save these
original instructions for future reference.
Note:The figures and illustrations in this manual are provided for reference only and
may differ from your specific model. Contact your dealer if you have questions.
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section).
Date of Purchase
Engine Model - Type - Trim
Engine Serial Number 
European Office Contact
Information
For questions regarding European emissions, please contact our European office at:
Max-Born-Straße 2, 68519 Viernheim, Germany.
European Union (EU) Stage
V (5): Carbon Dioxide (CO2)
Values
Carbon dioxide values of Briggs & Stratton EU Type-Approval Certificate engines can be
found by entering CO2 into the search window on BriggsandStratton.com.
Recycling Information




Recycle all packaging, used oil, and batteries according to
applicable government regulations.
Operator Safety
Safety Alert Symbol and Signal Words
The safety alert symbol ( ) is 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.
 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.
NOTICEindicates a situation thatcould result in damage to the product.
Hazard Symbols and Meanings
Safety information about
hazards that can result in
personal injury.
Read and understand the
Operator's Manual before
operating or servicing the
unit.
Fire hazard Explosion hazard
Shock hazard Toxic fume hazard
Hot surface hazard Noise hazard - Ear protection
recommended for extended
use.
Thrown object hazard -
Wear eye protection.
Explosion hazard
Frostbite hazard Kickback hazard
Amputation hazard -
moving parts
Chemical hazard
Thermal heat hazard Corrosive
Safety Messages
WARNING
Briggs & Stratton® Engines are not designed for and are not to be used to power:
fun-karts; go-karts; children's, recreational, or sport all-terrain vehicles (ATVs);
motorbikes; hovercraft; aircraft products; or vehicles used in competitive events not
sanctioned by Briggs & Stratton. For information about competitive racing products,
see www.briggsracing.com. For use with utility and side-by-side ATVs, please contact
Briggs & Stratton Power Application Center, 1-866-927-3349. Improper engine
application may result in serious injury or death.
WARNING
Fuel 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 fuel, do not fill above the
bottom of the fuel tank neck.
• Keep fuel 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
• Make sure 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 fuel to spill.

Not for
Reproduction
5
• 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 Tipping Unit for Maintenance
• When performing maintenance that requires the unit to be tipped, the fuel tank, if
mounted on the engine, 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 in the CLOSED
position.
When Storing Fuel 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 fuel vapors.
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.
WARNING
POISONOUS GAS HAZARD. Engine exhaust contains carbon monoxide, a
poisonous gas that could kill you in minutes. You CANNOT see it, smell it, or
taste it. Even if you do not smell exhaust fumes, you could still be exposed
to carbon monoxide gas. If you start to feel sick, dizzy, or weak while using
this product, get to fresh air RIGHT AWAY. See a doctor. You may have carbon
monoxide poisoning.
• Operate this product ONLY outside far away from windows, doors and vents to
reduce the risk of carbon monoxide gas from accumulating and potentially being
drawn towards occupied spaces.
• Install battery-operated carbon monoxide alarms or plug-in carbon monoxide
alarms with battery back-up according to the manufacturer's instructions. Smoke
alarms cannot detect carbon monoxide gas.
• DO NOT run this product inside homes, garages, basements, crawlspaces,
sheds, or other partially-enclosed spaces even if using fans or opening doors and
windows for ventilation. Carbon monoxide can quickly build up in these spaces
and can linger for hours, even after this product has shut off.
• ALWAYS place this product downwind and point the engine exhaust away from
occupied spaces.
WARNING
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 of the same design and installed in the same position
as the original parts. Other parts may not perform as well, may damage the unit,
and may result in injury.
• 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.
Features and Controls
Engine Controls
Compare the illustration (Figure: 1, 2, 3, 4, 5) with your engine to familiarize yourself with
the location of various features and controls.
A. Engine Identification Numbers Model - Type - Code
B. Spark Plug
C. Fuel Tank and Cap
D. Air Cleaner
E. Starter Cord Handle
F. Dipstick
G. Muffler, Muffler Guard (if equipped), Spark Arrester (if equipped)
H. Air Intake Grille
I. Throttle Control (if equipped)
J. Choke (if equipped)
K. Fuel Shut-off (if equipped)
L. Stop Switch (if equipped)
M. Primer (if equipped)

Not for
Reproduction
6 BRIGGSandSTRATTON.com
Engine Control Symbols and Meanings
Engine speed - FAST Engine speed - SLOW
Engine speed - STOP ON - OFF
Engine start - Choke
CLOSED
Engine start - Choke OPEN
Fuel Cap
Fuel Shut-off - OPEN
Fuel Shut-off - CLOSED
Fuel level - Maximum
Do not overfill
Operation
Oil Recommendations
Oil Capacity:See theSpecificationssection.
NOTICE
This engine was shipped from Briggs & Stratton without oil. Equipment manufacturers
or dealers may have added oil to the engine. Before you start the engine for the first
time, make sure to check the oil level and add oil as specified by 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.
We recommend the use of Briggs & Stratton®Warranty Certified oils for best
performance. Other high-quality detergent oils are permitted if classified for service SF,
SG, SH, SJ or higher. Do not use special additives.
Outdoor temperatures determine the correct oil viscosity for the engine. Use the chart
to select the best viscosity for the outdoor temperature range expected. Engines on
most outdoor power equipment operate well with 5W-30 Synthetic oil. For equipment
operated in hot temperatures, Vanguard®15W-50 Synthetic oil gives the best
protection.


A SAE 30 -Below 40 °F (4 °C) the use of SAE 30 will result in hard starting.
B 10W-30 -Above 80 °F (27 °C) the use of 10W-30 may cause increased oil
consumption. Checkthe oil level frequently.
C 5W-30
D Synthetic 5W-30
EVanguard®Synthetic 15W-50
Check and Add Oil
See Figure: 6
Before checking or adding oil
• Make sure the engine is level.
• Clean the oil fill area of any debris.
• See the Specifications section for oil capacity.
NOTICE
This engine was shipped from Briggs & Stratton without oil. Equipment manufacturers
or dealers may have added oil to the engine. Before you start the engine for the first
time, make sure to check the oil level and 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.
Check Oil Level
1. Remove the dipstick (A, Figure 6) and wipe with a clean cloth.
2. Install and tighten the dipstick (A, Figure 6).
3. Remove the dipstick and check the oil level. Correct oil level is at the top of the full
indicator (B, Figure 6) on the dipstick.
Add Oil
1. If the oil level is low, slowly add oil into the engine oil fill (C, Figure 6). Do not
overfill. After adding oil, wait one minute and then check the oil level.
2. Reinstall and tighten the dipstick (A, Figure 6).
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) is acceptable.
NOTICE Do not use unapproved gasolines, such as E15 and E85. Do not mix oil in
gasoline or modify the engine to run on alternate fuels. Use of unapproved fuels will
damage the engine components, which will not be covered under warranty.
To protect the fuel system from gum formation, mix a fuel stabilizer into the fuel.
SeeStorage.All fuel is not the same. If start or performance problems occur, change
fuel providers or brands. This engine is certified to operate on gasoline. The emissions
control system for carbureted engines is EM (Engine Modifications). The emissions
control systems for engines with electronic fuel injection are ECM (Engine Control
Module), MPI (Multi Port Injection), and if equipped an O2S (Oxygen Sensor).
High Altitude
At altitudes over 5,000 feet (1524 meters), a minimum 85 octane/85 AKI (89 RON)
gasoline is acceptable.
For carbureted engines, high altitude adjustment is required to maintain performance.
Operation without this adjustment will cause decreased performance, increased fuel
consumption, and increased emissions. Contact a Briggs & Stratton Authorized Service
Dealer for high altitude adjustment information. Operation of the engine at altitudes
below 2,500 feet (762 meters) with the high altitude adjustment is not recommended.
For Electronic Fuel Injection (EFI) engines, no high altitude adjustment is necessary.
Add Fuel
See Figure: 7
WARNING
Fuel 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 fuel, do not fill above the
bottom of the fuel tank neck.
• Keep fuel 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.

Not for
Reproduction
7
2. Fill the fuel tank (A, Figure 7) with fuel. To allow for expansion of the fuel, do not
fill above the bottom of the fuel tank neck (B). Some models have a fuel level
indicator (C). Do not fill the tank above the bottom of the fuel level indicator (D).
3. Reinstall the fuel cap.
Start and Stop Engine
See Figure: 8, 9, 10, 11, 12
Start Engine
WARNING
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.
WARNING
Fuel 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
POISONOUS GAS HAZARD. Engine exhaust contains carbon monoxide, a
poisonous gas that could kill you in minutes. You CANNOT see it, smell it, or
taste it. Even if you do not smell exhaust fumes, you could still be exposed to
carbon monoxide gas. If you start to feel sick, dizzy, or weak while using this
product, shut it off and get to fresh air RIGHT AWAY. See a doctor. You may
have carbon monoxide poisoning.
• Operate this product ONLY outside far away from windows, doors and vents to
reduce the risk of carbon monoxide gas from accumulating and potentially being
drawn towards occupied spaces.
• Install battery-operated carbon monoxide alarms or plug-in carbon monoxide
alarms with battery back-up according to the manufacturer's instructions. Smoke
alarms cannot detect carbon monoxide gas.
• DO NOT run this product inside homes, garages, basements, crawlspaces,
sheds, or other partially-enclosed spaces even if using fans or opening doors and
windows for ventilation. Carbon monoxide can quickly build up in these spaces
and can linger for hours, even after this product has shut off.
• ALWAYS place this product downwind and point the engine exhaust away from
occupied spaces.
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.
Determine The Starting System
Before starting the engine, you must determine the type of starting system that is on
your engine. Your engine will have one of the following types.
•ReadyStart® System: This features a temperature controlled automatic choke. It
does not have a manual choke or a primer.
•Choke System: This features a choke to be used for starting in cool
temperatures. Some models will have a separate choke control while others will
have a combination choke/throttle control. This type does not have a primer.
•Primer System: This features a red primer to be used for starting in cool
temperatures. It does not have a manual choke.
To start your engine, follow the instructions for your type of starting system.
Note:Equipment may have remote controls. See the equipment manual for location and
operation of remote controls.
ReadyStart® System
1. Check the engine oil. See the Check Oil Level section.
2. Make sure equipment drive controls, if equipped, are disengaged.
3. Move the fuel shut-off (A, Figure 8), if equipped, to the OPEN position.
4. Move the throttle control (B, Figure 8), if equipped, to the FAST position. Operate
the engine in the FAST position.
5. Push the stop switch (D, Figure 9), if equipped, to the ON position.
6. If the product is equipped with an engine stop lever (C, Figure 10), hold the engine
stop lever against the handle.
7. Rewind Start, if equipped: Firmly hold the starter cord handle (G, Figure 8). Pull
the starter cord handle slowly until resistance is felt, then pull rapidly.
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, if equipped: Turn the electric start switch to the ON / START
position.
NOTICE To extend the life of the starter, use short starting cycles (five seconds
maximum). Wait one minute between starting cycles.
Note:If the engine does not start after repeated attempts, contact your local dealer or go
to BRIGGSandSTRATTON.com or call 1-800-233-3723 (in USA).
Choke System
1. Check the engine oil. See the Check Oil Level section.
2. Make sure equipment drive controls, if equipped, are disengaged.
3. Move the fuel shut-off (A, Figure 8), if equipped, to the OPEN position.
4. Move the throttle control (B, Figure 8), if equipped, to the FAST position. Operate
the engine in the FAST position.
5. Move the choke control (F, Figure 11), to the CLOSED position.
Note:Choke is usually unnecessary when restarting a warm engine.
6. Push the stop switch (D, Figure 11), if equipped, to the ON position.
7. If the product is equipped with an engine stop lever (C, Figure 10), hold the engine
stop lever against the handle.
8. Rewind Start, if equipped: Firmly hold the starter cord handle (G, Figure 8). Pull
the starter cord handle slowly until resistance is felt, then pull rapidly.
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.
9. Electric Start, if equipped: Turn the electric start switch to the ON / START
position.
NOTICE To extend the life of the starter, use short starting cycles (five seconds
maximum). Wait one minute between starting cycles.
10. As the engine warms up, move the choke control (F, Figure 11) to the OPEN /
RUN position.
Note:If the engine does not start after repeated attempts, contact you local dealer or go
to BRIGGSandSTRATTON.com or call 1-800-233-3723 (in USA).
Primer System
1. Check the engine oil. See the Check Oil Level section.
2. Make sure equipment drive controls, if equipped, are disengaged.
3. Push the stop switch (A, Figure 12), if equipped, to the ON position.
4. Move the throttle control (B, Figure 12), if equipped, to the FAST position. Operate
the engine in the FAST position.
5. Push the red primer (F, Figure 12) three (3) times.
Note:Priming is usually unnecessary when restarting a warm engine.
Note:If you push the primer too many times, excessive fuel will flood the engine and it
will be difficult to start.

Not for
Reproduction
8 BRIGGSandSTRATTON.com
6. Hold the engine stop lever (C, Figure 10), if equipped, against the handle.
7. Firmly hold the starter cord handle (D, Figure 12). Pull the starter cord handle
slowly until resistance is felt, then pull rapidly.
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.
Note:If the engine does not start after repeated attempts, repeat Steps 5, 6, and 7. If it
still does not start, contact your local dealer or go to BRIGGSandSTRATTON.com or
call 1-800-233-3723 (in USA).
Stop Engine
WARNING
Fuel and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
• Do not choke, if equipped, the carburetor to stop the engine.
1. Engine Stop Lever, if equipped:Release the engine stop lever (E, Figure10).
Stop Switch, if equipped:Move the stop switch (D, Figure9,11, A, Figure12) to
the OFF position.
Throttle Control, if equipped:Move the throttle control (B, Figure8,12) to the
STOP position.
Electric Start Key, if equipped:Turn the electric start key to the OFF / STOP
position. Remove the key and keep in a safe place out of the reach of children.
2. After the engine stops, move the fuel shut-off (A, Figure8), if equipped, to the
CLOSED position.
Maintenance
NOTICE If the engine is tipped during maintenance, the fuel tank, if mounted on
engine, must be empty and the spark plug side must be up. If the fuel tank is not
empty and if the engine is tipped in any other direction, it may be difficult to start due
to oil or gasoline contaminating the air filter and/or the spark plug.
WARNING
When performing maintenance that requires the unit to be tipped, the fuel tank, if
mounted on the engine, must be empty or fuel can leak out and result in a fire or
explosion.
We recommend that you see any Briggs & Stratton Authorized Service 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.
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 of the same design and installed in the same position
as the original parts. Other parts may not perform as well, may damage the unit,
and may result in injury.
• 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.
Emissions Control Service
Maintenance, replacement, or repair of the emissions control devices and
systems may be performed by any off-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 Control Statements.
Maintenance Schedule
First 5 Hours
• Change oil (Not required on Just Check & Add™ models)
Every 8 Hours or Daily
• Check engine oil level
• Clean area around muffler and controls
• Clean air intake grille
Every 25 Hours or Annually
•Clean air filter 1
• Clean pre-cleaner (if equipped)
Every 50 Hours or Annually
• Change engine oil (Not required on Just Check & Add™ models)
• Service exhaust system
Annually
• Replace spark plug
• Replace air filter
• Replace pre-cleaner (if equipped)
•Service cooling system 1
•Check valve clearance 2
1 In dusty conditions or when airborne debris is present, clean more often.
2 Not required unless engine performance problems are noted.
Carburetor and Engine Speed
Never make adjustments to the carburetor or engine speed. The carburetor was set at
the factory to operate efficiently under most conditions. Do not tamper with the governor
spring, linkages, or other parts to change the engine speed. If any adjustments are
required contact a Briggs & Stratton Authorized Service Dealer for service.
NOTICE The equipment manufacturer specifies the maximum speed for the engine
as installed on the equipment.Do not exceedthis speed. If you are not sure what the
equipment maximum speed is, or what the engine speed is set to from the factory,
contact a Briggs & Stratton Authorized Service Dealer for assistance. For safe and
proper operation of the equipment, the engine speed should be adjusted only by a
qualified service technician.
Service Spark Plug
See Figure:13
Check the gap (A, Figure13) 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.
Service Exhaust System
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

Not for
Reproduction
9
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.
Remove accumulated debris from muffler and cylinder area. Inspect the muffler for
cracks, corrosion, or other damage. Remove the deflector or the spark arrester, if
equipped, and inspect for damage or carbon blockage. If damage is found, install
replacement parts before operating.
WARNING
Replacement parts must be of the same design and installed in the same position
as the original parts. Other parts may not perform as well, may damage the unit, and
may result in injury.
Change Engine Oil
See Figure:14,15,16
WARNING
Fuel and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
Running engines produce heat. Engine parts, especially muffler, become
extremely hot.
Severe thermal burns can occur on contact.
• When 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.
• Allow muffler, engine cylinder and fins to cool before touching.
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.
ForJust Check & Add™models, an oil change is not required. If you desire to change
oil, then follow the procedure below.
Remove Oil
The oil must be drained from the top oil fill tube.
1. With engine off but still warm, disconnect the spark plug wire (D, Figure 14) and
keep it away from the spark plug (E).
2. Remove the dipstick (A, Figure 15).
3. When you drain the oil from the top oil fill tube (C, Figure 16), keep the spark plug
(E) end of the engine up. Drain the oil into an approved container.
WARNING
When 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. To empty the fuel tank, run the engine
until it stops from lack of fuel.
Add Oil
• Make sure the engine is level.
• Clean the oil fill area of any debris.
• See the Specifications section for oil capacity.
1. Remove the dipstick (A, Figure 15) and wipe with a clean cloth.
2. Slowly pour oil into the engine oil fill (C, Figure 15). Do not overfill. After adding
oil, wait one minute and then check the oil level.
3. Install and tighten the dipstick (A, Figure 15).
4. Remove the dipstick and check the oil level. Correct oil level is at the top of the full
indicator (B, Figure 15) on the dipstick.
5. Reinstall and tighten the dipstick (A, Figure 15).
6. Connect the spark plug wire (D, Figure 14) to the spark plug (E).
Service Air Filter
WARNING
Fuel and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
• Never start and run the engine with the air cleaner assembly (if equipped) or the
air filter (if equipped) removed.
NOTICE Do not use pressurized air or solvents to clean the filter. Pressurized air
can damage the filter and solvents will dissolve the filter.
See the Maintenance Schedule for service requirements.
Various models use either a foam or a paper filter. Some models may also have an
optional pre-cleaner that can be washed and reused. Compare the illustrations in this
manual with the type installed on your engine and service as follows.
Foam Air Filter
See Figure: 17
1. Open the cover (B, Figure 17).
2. Remove the foam element (C, Figure 17).
3. Wash the foam element (C, Figure 17) in liquid detergent and water. Squeeze dry
the foam element in a clean cloth.
4. Saturate the foam element (C, Figure 17) with clean engine oil. To remove the
excess engine oil, squeeze the foam element in a clean cloth.
5. Install the foam element (C, Figure 17).
6. Close the cover (B, Figure 17).
Paper Air Filter
See Figure:18
1. Open the cover (B, Figure18).
2. Remove the filter (C, Figure18).
3. Remove the pre-cleaner (E, Figure18), if equipped, from the filter. To loosen
debris, gently tap the filter on a hard surface. If the filter is excessively dirty,
replace with a new filter.
4. Wash the pre-cleaner in liquid detergent and water. Then allow it to thoroughly air
dry.Do notoil the pre-cleaner.
5. Assemble the dry pre-cleaner, if equipped, to the filter.
6. Install the filter (C, Figure18).
7. Close the cover (B, Figure18).
Service Cooling System
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.
NOTICE Do not use water to clean the engine. Water could contaminate the fuel
system. Use a brush or dry cloth to clean the engine.
This is an air cooled engine. Dirt or debris can restrict air flow and cause the engine to
overheat, resulting in poor performance and reduced engine life.
1. Use a brush or dry cloth to remove debris from the air intake grille.
2. Keep linkage, springs and controls clean.
3. Keep the area around and behind the muffler, if equipped, free of any combustible
debris.
4. Make sure the oil cooler fins, if equipped, are free of dirt and debris.
After a period of time, debris can accumulate in the cylinder cooling fins and cause the
engine to overheat. This debris cannot be removed without partial disassembly of the
engine. Have a Briggs & Stratton Authorized Service Dealer inspect and clean the air
cooling system as recommended in the Maintenance Schedule.
Storage
WARNING
Fuel and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
When Storing Fuel Or Equipment With Fuel In Tank

Not for
Reproduction
10 BRIGGSandSTRATTON.com
• Store away from furnaces, stoves, water heaters or other appliances that have
pilot lights or other ignition sources because they can ignite fuel vapors.
Fuel System
See Figure:19,20
Note:Some models have a fuel tank for vertical storage that will let the engine tilt for
maintenance or storage (C, Figure19). Do not store in vertical position with fuel tank
filled above the bottom of the fuel level indicator (D), if equipped. For further instructions,
see the equipment manual.
Store the engine level (normal operating position). Fill fuel tank (A, Figure20) with fuel.
To allow for expansion of fuel, do not overfill above the fuel tank neck (B).
Fuel can become stale when kept in a storage container for more than 30 days. Each
time you fill the container with fuel, addfuel stabilizerto the fuel as specified by the
manufacturer’s instructions. This keeps fuel fresh and decreases fuel-related problems
or contamination in the fuel system.
It is not necessary to drain fuel from the engine whenfuel stabilizeris added as
instructed. Before storage, turn the engine ON for 2 minutes to move the fuel and
stabilizer through the fuel system.
Engine Oil
While the engine is still warm, change the engine oil. See the Change Oil section. For
Just Check & Add™ models, an oil change is not required.
Troubleshooting
For assistance, contact your local dealer or go to BRIGGSandSTRATTON.com or call
1-800-233-3723 (in USA).
Specifications
Model:80000
Displacement 7.63ci (125cc)
Bore 2.362in (60mm)
Stroke 1.75in (44,45mm)
Oil Capacity 15oz (,44L)
Spark Plug Gap .020in (,51mm)
Spark Plug Torque 180lb-in (20Nm)
Armature Air Gap .006 - .014in (,15 - ,36mm)
Intake Valve Clearance .004 - .008in (,10 - ,20mm)
Exhaust Valve Clearance .004 - .008in (,10 - ,20mm)
Model:90000
Displacement 8.64ci (140cc)
Bore 2.495in (63,4mm)
Stroke 1.75in (44,45mm)
Oil Capacity 15oz (,44L)
Spark Plug Gap .020in (,51mm)
Spark Plug Torque 180lb-in (20Nm)
Armature Air Gap .006 - .014in (,15 - ,36mm)
Intake Valve Clearance .004 - .008in (,10 - ,20mm)
Exhaust Valve Clearance .004 - .008in (,10 - ,20mm)
Model:093J00
Displacement 9.15ci (150cc)
Bore 2.583in (65,60mm)
Stroke 1.75in (44,45mm)
Oil Capacity 15oz (,44L)
Spark Plug Gap .020in (,51mm)
Spark Plug Torque 180lb-in (20Nm)
Armature Air Gap .006 - .014in (,15 - ,36mm)
Intake Valve Clearance .004 - .008in (,10 - ,20mm)
Exhaust Valve Clearance .004 - .008in (,10 - ,20mm)
Model:100000
Displacement 9.93ci (163cc)
Bore 2.688in (68,28mm)
Stroke 1.75in (44,45mm)
Oil Capacity 15oz (,44L)
Spark Plug Gap .030in (,76mm)
Spark Plug Torque 180lb-in (20Nm)
Armature Air Gap .006 - .014in (,15 - ,36mm)
Intake Valve Clearance .004 - .008in (,10 - ,20mm)
Exhaust Valve Clearance .004 - .008in (,10 - ,20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.
Service Parts - Model:80000,90000,093J00,100000
Service Part Part Number
Air Filter, Foam (see Figure17) 799579
Air Filter, Paper (see Figure18) 593260
Air Filter, Pre-cleaner (see Figure18) 594055
Oil - SAE 30 100113
Resistor Spark Plug (Model80000,90000,093J00) 692051
Resistor Spark Plug (Model100000) 594056
Spark Plug Wrench 19576
Spark Tester 19368
We recommend that you see any Briggs & Stratton Authorized Service Dealer for all
maintenance and service of the engine and engine parts.
Power Ratings:The gross power rating for individual gasoline engine models is
labeled in accordance with SAE (Society of Automotive Engineers) code J1940 Small
Engine Power & Torque Rating Procedure, and is rated in accordance with SAE J1995.
Torque values are derived at 2600 RPM for those engines with “rpm” called out on the
label and 3060 RPM for all others; horsepower values are derived at 3600 RPM. The
gross power curves can be viewed at www.BRIGGSandSTRATTON.COM. Net power
values are taken with exhaust and air cleaner installed whereas gross power values
are collected without these attachments. Actual gross engine power will be higher than
net engine power and is affected by, among other things, ambient operating conditions
and engine-to-engine variability. Given the wide array of products on which engines
are placed, the gasoline engine may not develop the rated gross power when used in a
given piece of power equipment. This difference is due to a variety of factors including,
but not limited to, the variety of engine components (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 engine.
Warranty
Briggs & Stratton Engine Warranty
Effective January 2019
Limited Warranty
Briggs & Stratton warrants that, during the warranty period specified below, it will repair
or replace, free of charge, any part that is defective in material or workmanship or
both. Transportation charges on product submitted for repair or replacement under this
warranty must be borne by purchaser. This warranty is effective for and is subject to
the time periods and conditions stated below. For warranty service, find the nearest
Authorized Service Dealer in our dealer locator map at BRIGGSandSTRATTON.COM.
The purchaser must contact the Authorized Service Dealer, and then make the product
available to the Authorized Service Dealer for inspection and testing.
There is no other express warranty. Implied warranties, including those of
merchantability and fitness for a particular purpose, are limited to the warranty
period listed below, or to the extent permitted by law.Liability for incidental or
consequential damages are excluded to the extent exclusion is permitted by law. Some
states or countries do not allow limitations on how long an implied warranty lasts,
and some states or countries do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitation and exclusion may not apply to you.
This warranty gives you specific legal rights and you may also have other rights which
vary from state to state and country to country4.