Simplicity 303447-0400-01 Ohjekirja

Merkki: Simplicity

Malli: 303447-0400-01

Luokka: Motor vehicle accessories & components

Tyyppi: Ohjekirja

Not for

Reproduction

80029975WST

Revision: A

Not for

Reproduction

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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

Look for the 2D barcode located on some

engines. When viewed with a 2D-capable

device, the code will bring up our website

where you can access support information

for this product. Data rates apply. Some

countries may not have online support

information available.

European Office Contact

Information

For questions regarding European emissions, please contact our European office at:

Max-Born-Straße 2, 68519 Viernheim, Germany.

Recycling Information

All packaging, used oil, and batteries should be recycled

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

MeaningSymbolMeaningSymbol

Read and understand the

Operator's Manual before

operating or servicing the unit.

Safety information about

hazards that can result in

personal injury.

Explosion hazardFire hazard

Toxic fume hazardShock hazard

Noise hazard - Ear protection

recommended for extended

use.

Hot surface hazard

Explosion hazardThrown object hazard -

Wear eye protection.

Kickback hazardFrostbite hazard

Chemical HazardAmputation hazard - moving

parts

CorrosiveThermal heat hazard

Safety Messages

WARNING

This product can expose you to chemicals including gasoline engine exhaust, which is

known to the State of California to cause cancer, and carbon monoxide, which is known

to the State of California to cause birth defects or other reproductive harm. For more

information go to www.P65Warnings.ca.gov.

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.

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• 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 fuel 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 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.

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Features and Controls

Engine Controls

Compare the illustration (Figure: 1, 2, 3, 4) 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. Air Cleaner (without Fuel Tank)

D. Air Cleaner (with Fuel Tank)

E. Dipstick

F. Oil Fill

G. Oil Filter (if equipped)

H. Oil Drain Plug

I. Oil Pressure Sensor

J. Finger Guard

K. Electric Starter

L. Rewind Starter (if equipped)

M. Carburetor - Carburetor Models

N. Muffler (if equipped)

O. Fuel Pump

P. Starter Switch

Q. Throttle Control

R. Choke Control

S. Fuel Filter (if equipped)

T. Fuel Tank (if equipped)

U. Fuel Shut Off (if equipped)

V. Stop Switch (if equipped)

W. Oil Cooler (if equipped)

X. Fuel Pump Module - EFI Models

Y. Electronic Control Module - EFI Models

Z. Fuel Injector - EFI Models

Some engines and equipment have remote controls. See the equipment manual

for location and operation of remote controls.

Engine Control Symbols and Meanings

MeaningSymbolMeaningSymbol

Engine speed - SLOWEngine speed - FAST

ON - OFFEngine speed - STOP

Engine start - Choke OPENEngine start - Choke

CLOSED

Fuel Shut-off - CLOSEDFuel Cap

Fuel Shut-off - OPEN

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 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.

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. Engines on most

outdoor power equipment operate well with 5W-30 Synthetic oil. For equipment operated

in hot temperatures, Vanguard™ 15W-50 Synthetic oil provides the best protection.

SAE 30 - Below 40 °F (4 °C) the use of SAE 30 will result in hard starting.A

10W-30 - Above 80 °F (27 °C) the use of 10W-30 may cause increased oil

consumption. Check oil level more frequently.

5W-30C

Synthetic 5W-30D

Vanguard™ Synthetic 15W-50E

Check Oil Level

See Figure: 5

Before adding or checking the oil

• Make sure the engine is level.

• Clean the oil fill area of any debris.

1. Remove the dipstick (A, Figure 5) and wipe with a clean cloth.

2. Fully install the dipstick (A, Figure 5).

3. Remove the dipstick and check the oil level. Correct oil level is at the top of the full

indicator (B, Figure 5) on the dipstick.

4. If oil level is low, slowly add oil into the engine oil fill (C, Figure 5). Do not overfill.

After adding oil, wait one minute and then recheck the oil level.

5. Fully install the dipstick (A, Figure 5).

Low Oil Protection System (if equipped)

Some engines are equipped with a low oil sensor. If the oil is low, the sensor will either

activate a warning light or stop the engine. Stop the engine and follow these steps before

restarting the engine.

• Make sure the engine is level.

• Check the oil level. See the

Check Oil Level

section.

• If the oil level is low, add the proper amount of oil. Start the engine and make sure

the warning light (if equipped) is not activated.

• If the oil level is not low, do not start the engine. Contact a Briggs & Stratton

Authorized Service Dealer to have the oil problem corrected.

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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 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.

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: 6

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.

2. Fill the fuel tank (A, Figure 6) with fuel. To allow for expansion of the fuel, do not fill

above the bottom of the fuel tank neck (B).

3. Reinstall the fuel cap.

Start and Stop Engine

See Figure: 7, 8, 9, 10

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.

• Electronic Fuel Injection (EFI) System: This features Electronic Fuel Injection. It

does not have a choke or a primer.

• Electronic Fuel Management System: This features an Electronic Control Unit that

monitors engine and temperature conditions. 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 and throttle control. This type does not have a primer.

Note:

Equipment may have remote controls. See the equipment manual for location and

operation of remote controls.

Electronic Fuel Injection (EFI) 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 7), if equipped, to the OPEN position.

4. Push the stop switch (F, Figure 7, 8), if equipped, to the ON position.

5. Move the throttle control (B, Figure 8), if equipped, to the FAST position. Operate

the engine in the FAST position.

6. Rewind Start, if equipped with key switch: Turn the key switch (D, Figure 7, 8) to

the ON position.

7. Rewind Start, if equipped: Firmly hold the starter cord handle (E, Figure 7, 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 (D, Figure 7, 8) to the ON

or START position.

NOTICE

To extend the life of the starter, use short starting cycles (five seconds

maximum). Wait one minute between starting cycles.

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Note:

If the engine does not start after repeated attempts, contact you local dealer or go

to VanguardEngines.com or call 1-800-999-9333 (in USA).

Electronic Fuel Management 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 7), if equipped, to the OPEN position.

4. Push the stop switch (F, Figure 7, 8), if equipped, to the ON position.

5. Move the throttle control (B, Figure 8), if equipped, to the FAST position. Operate

the engine in the FAST position.

6. Rewind Start, if equipped with key switch: Turn the key switch (D, Figure 7, 8) to

the ON position.

7. Rewind Start, if equipped: Firmly hold the starter cord handle (E, Figure 7, 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 (D, Figure 7, 8) to the ON

or 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 VanguardEngines.com or call 1-800-999-9333 (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 7), if equipped, to the OPEN position.

4. Push the stop switch (F, Figure 7, 8), if equipped, to the ON position.

5. Move the throttle control (B, Figure 8), if equipped, to the FAST position. Operate

the engine in the FAST position.

6. Move the choke control (C, Figure 9, 10) to the CLOSED position.

Note:

Choke is usually unnecessary when restarting a warm engine.

7. Rewind Start, if equipped with key switch: Turn the key switch (D, Figure 7, 8) to

the ON position.

8. Rewind Start, if equipped: Firmly hold the starter cord handle (E, Figure 7, 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 key switch (D, Figure 7, 8) to the ON or 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 (C, Figure 9, 10), if equipped, to

the OPEN position.

Note:

If the engine does not start after repeated attempts, contact you local dealer or go

to VanguardEngines.com or call 1-800-999-9333 (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 the carburetor, if equipped, to stop the engine.

1. Stop Switch, if equipped: Move the stop switch (F, Figure 7, 8) to the OFF position.

Key Switch, if equipped: With the throttle control, if equipped, in the SLOW position,

turn the key switch (D, Figure 7, 8) to the OFF 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 7), 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

Every 8 Hours or Daily

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• Check engine oil level

• Clean area around muffler and controls

Every 100 Hours or Annually

• Replace spark plugs

• Change engine oil

• Replace oil filter (if equipped)

• Service air filter

• Clean pre-cleaner (if equipped)

• Service exhaust system

Every 250 Hours

• Check valve clearance. Adjust if necessary.

Every 400 Hours or Annually

• Replace air filter

• Replace fuel filter

• Service cooling system

• Clean oil cooler fins

In dusty conditions or when airborne debris is present, clean more often.

Electronic Fuel Injection (EFI) System

The EFI System monitors engine temperature, engine speed, and battery voltage for engine

starting and warm up. There are no adjustments on the system. If starting or operation

problems occur, contact a Briggs & Stratton Authorized Service Dealer.

NOTICE

Make sure to follow the steps below or the EFI System could be damaged.

• Never start the engine if the battery cables are loose.

• Turn the key to the off position before disconnecting, removing and or installing the

battery.

• Never use a battery charger to start the engine.

• Never disconnect the battery cables while the engine is running.

• When connecting the battery cables, first connect the positive (+) cable and then

connect the negative (-) cable to the battery.

• When charging the battery, turn the ignition switch to the off position and disconnect

the negative (-) battery cable from the battery.

• Do not spray water directly on the Electronic Control Module.

Electronic Fuel Management System

The Electronic Fuel Management System monitors engine temperature, engine speed,

and battery voltage to adjust the choke during engine starting and warm up. There are no

adjustments on the system. If starting or operation problems occur, contact an Authorized

Briggs & Stratton Dealer.

NOTICE

Make sure to follow the steps below or the Electronic Fuel Management

System could be damaged.

• Never start the engine if the battery cables are loose.

• Turn the key to the off position before disconnecting, removing and / or installing the

battery.

• Never use a battery charger to start the engine.

• Never disconnect the battery cables while the engine is running.

• When connecting the battery cables, first connect the positive (+) cable and then

connect the negative (-) cable to the battery.

• When charging the battery, turn the ignition switch to the off position and disconnect

the negative (-) battery cable from the battery.

• Do not spray water directly on the Electronic Control Unit.

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 unsure 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: 11

Check the gap (A, Figure 11) 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