Briggs & Stratton 120000 Manual

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Model Series

Covered in

This Manual

110000

120000

200000

210000

Operating & Maintenance

Instructions

Model Type Code

Month Day Year

Note: General Model Series numbers noted above are inclusive of the specific model

number found on your engine. To get replacement parts or technical assistance in

the future, write your engine Model, Type, Code and date of purchase here.

TABLE OF CONTENTS

Safety 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Engine Information 6. . . . . . . . . . . . . . . . . . . . . . . .

Oil 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fuel and Starting Information 8. . . . . . . . . . . . . . .

Starting and Stopping 9-10. . . . . . . . . . . . . . . . . . .

Maintenance 11-14. . . . . . . . . . . . . . . . . . . . . . . . .

Parts and Service & Storage 15-16. . . . . . . . . . . .

Warranty Information 17. . . . . . . . . . . . . . . . . . . . .

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.

Need assistance? Go to www.briggsandstratton.com

for detailed information regarding Briggs & Stratton engines.

Or call, 1-800-233-3723, (U.S.A. and Canada)

to hear a menu of pre-recorded messages

offering engine maintenance information.

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BEFORE OPERATING ENGINE

•Read entire Operating & Maintenance Instructions AND

the instructions for the equipment this engine powers.*

•Failure to follow instructions could result in serious injury

or death.

THE OPERATING & MAINTENANCE INSTRUCTIONS

CONTAIN SAFETY INFORMATION TO

•Make you aware of hazards associated with engines

•Inform you of the risk of injury associated with those hazards, and

•Tell you how to avoid or reduce the risk of injury.

275092

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, might result in minor or moderate

injury.

CAUTION,when used without the alert symbol,

indicates a situation that could result in damage

to the engine.

WARNING

The engine exhaust from this prod-

uct contains chemicals known to the

State of California to cause cancer,

birth defects, or other reproductive

harm.

HAZARD SYMBOLS AND MEANINGS

Explosion

Toxic Fumes

Moving Parts

ShockHot Surface

Kickback

Fire

THE INTERNATIONAL SYMBOLS USED

ON THE ENGINE OR

IN THIS MANUAL INCLUDE:

On Off

Fuel Shutoff

Read Owner’s

Manual

Stop Fuel

Choke

Safety Alert

Oil

*Briggs & Stratton does not necessarily know what equipment this engine will power. For that reason, you should carefully read

and understand the operating instructions for the equipment on which your engine is placed.

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SAFETY

Gasoline and its vapors are extremely

flammable and explosive.

Fire or explosion can cause severe burns

or death.

WARNING

WHEN ADDING FUEL

•Turn engine OFF and let engine cool at least 2

minutes before removing gas cap.

•Fill fuel tank outdoors or in well-ventilated area.

•Do not overfill fuel tank. Fill tank to approximately

1-1/2 inches below top of neck to allow for fuel

expansion.

•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.

WHEN STARTING ENGINE

•Make sure spark plug, muffler, fuel cap and air

cleaner are in place.

•Do not crank engine with spark plug removed.

•If fuel spills, wait until it evaporates before starting

engine.

•If engine floods, set choke to OPEN/RUN position,

place throttle in FAST and crank until engine starts.

WHEN OPERATING EQUIPMENT

•Do not tip engine or equipment at angle which

causes gasoline to spill.

•Do not choke carburetor to stop engine.

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.

Starting engine creates sparking.

Sparking can ignite nearby flammable

gases.

Explosion and fire could result.

WARNING

•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

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 cord slowly until

resistance is felt, then pull rapidly.

•Remove all external equipment/engine loads

before starting engine.

•Direct coupled equipment components such as,

but not limited to, blades, impellors, 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.

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SAFETY

Engines give off carbon monoxide, an

odorless, colorless, poison gas.

Breathing carbon monoxide can cause

nausea, fainting or death.

WARNING

•Start and run engine outdoors.

•Do not start or run engine in enclosed area, even if

doors or windows are open.

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 combustibles from muffler

area and cylinder area.

•Install and maintain in working order a spark

arrester before using equipment on forest-covered,

grass-covered, brush-covered unimproved land.

The state of California requires this (Section 4442

of the California Public Resources Code). Other

states may have similar laws. Federal laws apply

on federal land.

WARNING

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ENGINE INFORMATION

1. Spark plug

2. Air cleaner

3. Choke

4. Carburetor

5. Fuel shut-off valve

(if equipped)

6. Rope handle

7. Finger guard

8. Stop switch/OIL GARD®light

(if equipped)

9. Fuel fill

10. Fuel tank

11. Oil fill/Dipstick

(if equipped)

12. Blower housing

13. Oil drain plug

14. Oil fill cap

15. Engine Model Type Code

xxxxx xxxx xx xxxxxxxx

16. Muffler/(Muffler guard, if equipped)/

(Spark arrester, if equipped)

GENERAL INFORMATION

ENGINE MODEL

This is a single cylinder, overhead valve (OHV), air-cooled

engine. It is a low emissions engine.

In the state of California, OHV Model Series 110000 and

120000 engines are certified by the California Air Re-

sources Board to meet emissions standards for 125 hours.

OHV Model Series 200000, 210000 engines are certified

by the California Air Resources Board to meet emissions

standards for 250 hours. Such certification does not grant

the purchaser, owner or operator of this engine any

additional warranties with respect to the performance or

operational life of this engine. This engine is warranted

solely according to the product and emissions warranties

stated elsewhere in this manual.

Note: For practical operation, horsepower loading should

not exceed 85% of rated horsepower. Engine power will de-

crease 3-1/2% for each 1,000 feet (300 meters) above sea

level and 1% for each 10°F (5.6°C) above 77°F (25°C).

Engine will operate satisfactorily at an angle up to 15°.

MODEL SERIES 110000

Bore 2-11/16 in. (68 mm). . . . . . . . . . . . . . . . . . . . . . . . . . .

Stroke 2-3/64 in. (52 mm). . . . . . . . . . . . . . . . . . . . . . . . . .

Displacement 11.58 cu. in. (190 cc). . . . . . . . . . . . . . . . . .

MODEL SERIES 120000

Bore 2-11/16 in. (68 mm). . . . . . . . . . . . . . . . . . . . . . . . . . .

Stroke 2-13/64 in. (56 mm). . . . . . . . . . . . . . . . . . . . . . . . .

Displacement 12.48 cu. in. (206 cc). . . . . . . . . . . . . . . . . .

MODEL SERIES 200000

Bore 3.120 in. (79.23 mm). . . . . . . . . . . . . . . . . . . . . . . . . .

Stroke 2.438 in. (61.67 mm). . . . . . . . . . . . . . . . . . . . . . . .

Displacement 18.64 cu. in. (305 cc). . . . . . . . . . . . . . . . . .

MODEL SERIES 210000

Bore 3.300 in. (83.81 mm). . . . . . . . . . . . . . . . . . . . . . . . . .

Stroke 2.438 in. (61.67 mm). . . . . . . . . . . . . . . . . . . . . . . .

Displacement 20.85 cu. in. (342 cc). . . . . . . . . . . . . . . . . .

TUNE-UP SPECIFICATIONS

Models 110000/120000

Armature air gap 0.010 – 0.014 in. (0.25 – 0.36 mm). . .

Spark plug gap 0.030 in. (0.76 mm). . . . . . . . . . . . . . . . . .

Valve clearance with valve springs installed and piston 1/4 in.

(6 mm) past top dead center (check when engine is cold).

See Repair Manual P/N 272147.

Intake 0.004 – 0.006 in. (0.10 – 0.15 mm). . . . . . . . . . . . .

Exhaust 0.009 – 0.011 in. (0.23 – 0.28 mm). . . . . . . . . . .

TUNE-UP SPECIFICATIONS

Models 200000/210000

Armature air gap 0.008 – 0.012 in. (0.20 – 0.30 mm). . .

Spark plug gap 0.030 in. (0.76 mm). . . . . . . . . . . . . . . . . .

Valve clearance with valve springs installed and piston 1/4 in.

(6 mm) past top dead center (check when engine is cold).

See Repair Manual P/N 272147.

Intake 0.004 – 0.006 in. (0.10 – 0.15 mm). . . . . . . . . . . . .

Exhaust 0.004 – 0.006 in. (0.10 – 0.15 mm). . . . . . . . . . .

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OIL

275092

CAUTION: This engine is shipped from Briggs &

Stratton without oil. Check oil level before starting

engine. If you start the engine without oil, the

engine will be damaged beyond repair and will not

be covered under warranty.

Note: If this engine is equipped with gear reduction, gear

reduction case must be filled with oil prior to operating en-

gine. See gear reduction oil filling instructions on page 12.

OIL CAPACITY

Model 110000 and 120000 series engines hold approxi-

mately 5/8 quart (20 ounces; 0.6 liter).

Model series 200000 and 210000 engines hold approxi-

mately 7/8 quart (28 ounces; 0.8 liter).

TYPE OF OIL TO USE

•Use a high quality detergent oil classified “For Service

SF, SG, SH, SJ” or higher, such as Briggs & Stratton

SAE 30, Part Number 100005 (20 oz) or 100028 (48 oz).

•Do not use special additives.

•Choose a viscosity according to the table opposite.

Note: Synthetic oil meeting ILSAC GF-2, API

certification mark and API service symbol

(shown at left) with “SJ/CF ENERGY CON-

SERVING” or higher, is an acceptable oil at all

temperatures. Use of synthetic oil does not

alter required oil change intervals.

°F-20 0 20 40 60 80 100

°C-30 -20 -10 0 10 20 30 40

STARTING TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE

*CAUTION: Air cooled engines run hotter than automotive

engines. The use of non-synthetic multi-viscosity oils

(5W-30, 10W-30, etc.) in temperatures above 40°F (4°C)

will result in higher than normal oil consumption. When using

a multi-viscosity oil, check oil level more frequently.

** CAUTION: SAE 30 oil, if used below 40°F (4°C), will result

in hard starting and possible engine bore damage due to

inadequate lubrication.

SAE Viscosity Grades

CHECKING AND ADDING OIL

•Check oil level before starting the engine.

•Check level daily, or after every eight (8) hours.

•Keep oil level at FULL.

•Do not overfill.

[1] Place engine level and

clean around oil fill area.

[2] Remove dipstick and wipe with clean

cloth. Replace and tighten dipstick.

Remove and check oil level.

High

Oil Fill

(if equipped)

FULL

[3] Pour oil slowly. Fill to FULL line on

dipstick – recheck.

[4] Replace and tighten dipstick.

[1] Place engine level and

clean around oil fill area.

[2] Remove oil fill

cap or dipstick.

Low

Oil Fill

OIL LEVEL

[3] Pour oil slowly. Fill to

point of overflowing.

[4] Replace and tighten

oil fill cap.

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OIL

CHECKING AND ADDING OIL

[1] Remove dipstick

and wipe with

clean cloth.

Low

Oil Fill

with Dipstick

[2] Insert dipstick,

but DO NOT

TIGHTEN.

Remove and

check oil level.

[3] Pour oil slowly.

Fill to FULL

mark on dip-

stick. Replace

and tighten dip-

stick.

FULL OIL

LEVEL

FUEL

TYPE OF FUEL TO USE

•Use clean, fresh, regular unleaded gasoline with a

minimum of 85 octane. Fresh fuel prevents gum from

forming in the fuel system or on essential carburetor parts.

Purchase fuel in quantity that can be used within 30 days.

•Do not use gasoline which contains Methanol.

•Do not mix oil with gasoline.

•For engine protection use Briggs & Stratton Gasoline

Additive available from your Authorized Briggs &

Stratton Dealer (P/N 5041 or single use pouch).

•This engine is certified to operate on gasoline. Exhaust

Emission Control System: EM (Engine Modifications).

CAUTION: Some fuels, called oxygenated or reformu-

lated gasoline, are gasoline blended with alcohols or

ethers. Excessive amounts of these blends can damage

the fuel system or cause performance problems. If any

undesirable operating symptoms occur, use gasoline

with a lower percentage of alcohol or ether.

ADDING FUEL

Fuel Fill

WARNING

[1] Remove cap. Fill tank to approximately 1-1/2

inches below top of neck to allow for fuel

expansion. Be careful not to overfill.

Briggs & Stratton Smart-fill)fuel can fills to the

correct level and automatically shuts off, reduc-

ing spills and emissions.

[2] Replace cap before starting.

•Turn engine OFF and let engine cool at least 2

minutes before removing gas cap.

•Fill fuel tank outdoors or in well-ventilated area.

•Keep gasoline away from sparks, open flames,

pilot lights, heat, and other ignition sources.

•If fuel spills, wait until it evaporates before

starting engine.

STARTING

STARTING AND OPERATING TIPS

♦Store and fuel equipment in level position.

♦Use fresh fuel. (See Fuel.)

♦Use correct type of oil for expected starting

temperature. (See Oil.)

♦Remove external equipment/engine loads. (See

equipment operating instructions.)

♦Periodically remove any debris buildup from the

machine (See Maintenance.)

♦After engine has started, let it warm up several

seconds to several minutes, depending on outside

temperature.

♦For maximum performance and life, operate engine

with choke in RUN and throttle in FAST.

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STARTING AND STOPPING

WARNING

•Do not use pressurized starting fluids.

•Vapors are flammable.

CAUTION: Some engines may be equipped with OIL

GARD®. The OIL GARD®is intended to warn the

operator that the engine is low on oil. Always check oil

level before starting. Engine damage may occur if the oil

level is not properly maintained and will void warranty

coverage. If the engine will not start, has stopped running

and/or a light flickers in the stop switch, add oil (see

instructions).

REWIND (MANUAL) STARTER

TO START ENGINE

[1] Check oil level (see p. 7).

[2] Turn fuel shut-off valve (if equipped) 1/4 turn

to OPEN.

[3] Push choke lever to CHOKE position.

[4] Move throttle (if

equipped) to FAST.

Operate engine with

throttle in FAST.

Fuel shut-off Choke

OIL

LEVEL

FULL

OPEN

POSITION

[5] Push rocker switch

(if equipped) to ON. [6] Grasp rope handle. Pull slowly until

resistance is felt, then pull rapidly to start

engine and avoid kickback.

[7] Let engine warm up.

If choke equipped:

Slowly adjust toward RUN

position. Wait until engine

runs smoothly before

each choke adjustment.

WARNING

TO STOP ENGINE

[1] Move throttle (if equipped)

to SLOW, then to STOP.

Fuel shut-off

[2] Push rocker switch

(if equipped) to

OFF.

[3] Close fuel shut-off

valve (if equipped).

CAUTION: Do not stop

engine by moving choke

control to CHOKE.

Backfire, fire or engine

damage could occur.

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STARTING AND STOPPING

ELECTRIC (KEY) STARTER (if equipped)

TO START ENGINE

[1] Check oil level (see p. 7).

[2] Turn fuel shut-off valve (if equipped) 1/4 turn

to OPEN.

[3] Push choke lever to CHOKE position.

[4] Move throttle

(if equipped) to FAST.

Operate engine with

throttle in FAST.

Fuel shut-off Choke

OPEN

POSITION

OIL

LEVEL

FULL

[5] Push rocker switch (if

equipped) to ON.

[6] Insert key and

turn to START.

CAUTION: To prolong starter life, use short starting

cycles (5 seconds maximum, then wait one minute).

Follow equipment manufacturer’s recommendations

for charging battery.

[7] Let engine warm up.

If choke equipped: Slowly adjust toward RUN

position. Wait until engine runs smoothly before

each choke adjustment.

TO STOP ENGINE

[1] Move throttle

(if equipped) to SLOW.

[2] Turn key to OFF. Remove key

and store out of reach of children.

Fuel shut-off[3] Push rocker switch

(if equipped) to OFF.

[4] Close fuel shut-off valve

(if equipped).

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