Briggs and Stratton 123600 Parts Manual

Model Series

Covered in

This Manual

11A600

110600 111600 120600 121600 122600 123600 124600 125600 126600

Operating & Maintenance

Instructions

Model Type Code

Note: General M odel Series n umbers n oted a bove include m any s pecific n umbers like the o n es on your engine. To get r epl acemen t parts or technical a ssist an ce i n 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 11-13. . . . . . . . . . . . . . . . . . . . . . . . .

Adjustments 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

Briggs & Stratton does not approve or authorize the use of these engines on 3-wheel All Terrain Vehicles (ATVs), motor bikes, 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.

In the USA and Canada our 24 hour hotline is

Briggs & Stratton Corporation Milwaukee, Wisconsin 53201

www.briggsandstratton.com

WARNING

1-800-233-3723

Month Day Year

THE POWER IN POWER EQUIPMENT

Thank you for selecting a Briggs & Stratton engine to power your equipment. Briggs & Stratton is committed to producing a line of engines which will make your life’s chores easier to perform. We have,

at the same time, improved the design of our engines so they are environmentally friendly . Since 1995, we have succeeded in reducing smog-forming exhaust emissions from our engines by 70%. Briggs & Stratton’s ef forts have not stopped there. We are also committed to designing and introducing even cleaner engines in the future, while maintaining our reputation for excellent utility and value.

Briggs & Stratton’s environmental awareness has resulted in the engineering of the “Smart-Fill” gas can, featuring a spill resistant nozzle which opens only when fully inserted into the gas tank, and which shuts off automatically when the tank is full. Because refueling spills can harm the environment, the Smart-Fill container helps preserve a stronger ecosystem by reducing this source of pollution.

We hope you will enjoy your new engine and equipment. We welcome you to our worldwide family of Briggs & Stratton engine users.

Best Wishes Always,

The Employees of Briggs & Stratton Corporation

Look For Relevant Emissions Durability Period and Air Index

Information On Your Engine Emissions Label

Engines that are certified to meet the California Air Resources Board (CARB) Tier 2 Emission Standards must display information regarding the Emissions Durability Period and the Air Index. Briggs & Stratton makes this information available to the consumer on our emission labels.

The Emissions Durability Period describes the number of hours of actual running time for which the engine is certified to be emissions compliant, assuming proper maintenance in accordance with the Operating & Maintenance Instructions. The following categories are used:

Moderate: Engine is certified to be emission compliant for 125 hours of actual engine running time. Intermediate: Engine is certified to be emission compliant for 250 hours of actual engine running time. Extended: Engine is certified to be emission compliant for 500 hours of actual engine running time. For example, a typical walk-behind lawn mower is used 20 to 25 hours per year. Therefore, the Emissions Durability

Period of an engine with an intermediate rating would equate to 10 to 12 years. The Air Index is a calculated number describing the relative level of emissions for a specific engine family. The lower the

Air Index, the cleaner the engine. This information is displayed in graphical form on the emissions label.

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.

274264

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.

HAZARD SYMBOLS AND MEANINGS

Fire

Explosion

Toxic Fumes

Kickback

Moving Parts

Shock

Hot Surface

WARNING

The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

* 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.

SAFETY

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 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.

WARNING

Unintentional sparking can result in fire or electric shock.

Unintentional start-up can result in entanglement, traumatic amputation, or laceration.

BEFORE PERFORMING ADJUSTMENTS OR REPAIRS

• Disconnect spark plug wire and keep it away from spark plug.

• Disconnect battery at negative terminal (only engines with electric start).

WHEN TESTING FOR SPARK

• Use approved spark plug tester.

• Do not check for spark with spark plug removed.

WARNING

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-of f 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.

• If there is natural or LP gas leakage in area, do not start engine.

• Do not use pressurized starting fluids because vapors are flammable.

SAFETY

WARNING

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

Running engines produce heat. Engine parts, especially muffler, become extremely hot.

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

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.

Rapid retraction of starter cord (kickback) will pull h and 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.

ENGINE PARTS

1. Primer bulb

2. Air cleaner

3. Fuel fill

4. Finger guard

5. Spark plug wire

6. Carburetor

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 Resources Board to meet emissions standards for 125 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.

MODEL SERIES 110000

Bore 2-11/16 in. (68.26 mm). . . . . . . . . . . . . . . . . . . . . . . . .

7. Rope handle

8. Fuel tank

9. Oil fill/Dipstick

10. Side drain plug (if equipped)

11. Muffler/Muffler guard (if equipped)

12. Spark arrester (if equipped)

13. Engine Model Type Code

xxxxx xxxx xx xxxxxxxx

THE INTERNATIONAL SYMBOLS USED

ON THE ENGINE OR

IN THIS MANUAL INCLUDE:

Safety Alert

Stop

Read Owner’s

Manual

Oil

Fuel Shutoff

On Off

Stroke 1-51/64 in. (46.00 mm). . . . . . . . . . . . . . . . . . . . . . .

Displacement 10.20 cu. in. (167.4 cc). . . . . . . . . . . . . . . .

MODEL SERIES 120000

Bore 2-11/16 in. (68.26 mm). . . . . . . . . . . . . . . . . . . . . . . . .

Stroke 2-3/64 in. (52.00 mm). . . . . . . . . . . . . . . . . . . . . . . .

Displacement 11.58 cu. in. (189.7 cc). . . . . . . . . . . . . . . . .

Note: For practical operation, the horsepower loading should not exceed 85% of rated horsepower. Engine power will decrease 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). It will operate satisfactorily at an angle up to 15°.

Fuel Choke

Primer

TUNE-UP SPECIFICATIONS

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

Spark plug gap 0.020 in. (0.51 mm). . . . . . . . . . . . . . . . . .

Valve c learance with valve springs installed and p iston 0.1 in. (2.5 mm) past top dead center (check when engine is cold). See Repair Manual P/N 274008.

Intake 0.004 – 0.008 in. (0.10 – 0.20 mm). . . . . . . . . . . . .

Exhaust 0.004 – 0.008 in. (0.10 – 0.20 mm). . . . . . . . . . .

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