quantum operating & maintenance instructions

Document: - page 1 (Black)Screen angle and frequency: 45.0000, 150.0000

QuantumOperating & Maintenance

Instructions

Model Type Code

Month Day Year

Model SeriesCovered in

This Manual120000

Note: General Model Series number noted above is inclusive of the specific modelnumber found on your engine. To get replacement parts or technical assistance inthe future, write your engine Model, Type, Code and date of purchase here.

TABLE OF CONTENTSSafety 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. . . . . . . . . . . . . . . . . . . . .

WARNINGBriggs & Stratton does not approve or authorize the use of these engineson 3-wheel All Terrain Vehicles (ATVs), motor bikes, aircraft products orvehicles intended for use in competitive events. Use of these engines insuch applications could result in property damage, serious injury(including paralysis), or even death.

Need assistance? Go to www.briggsandstratton.comfor 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.

PRINTED IN U.S.A. Copyright 2003 by Briggs & Stratton Corporation FORM NO. 275177-1/03


2

The Power That Works For You.

Look For Relevant Emissions Durability Period and Air Index Information OnYour Engine Emissions Label

Engines that are certified to meet the California Air Resources Board (CARB) Tier 2 Emission Standards must displayinformation regarding the Emissions Durability Period and the Air Index. Briggs & Stratton makes this information availableto the consumer on our emission labels. The engine emission label will indicate certification information.

The Emissions Durability Period describes the number of hours of actual running time for which the engine is certified tobe 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 DurabilityPeriod 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 theAir Index, the cleaner the engine. This information is displayed in graphical form on the emissions label.

After July 1, 2000, Look For Emissions Compliance Period OnEngine Emissions Compliance Label

After July 1, 2000 certain Briggs & Stratton engines will be certified to meet the United States Environmental ProtectionAgency (USEPA) Phase 2 emission standards. For Phase 2 certified engines, the Emissions Compliance Period referredto on the Emissions Compliance label indicates the number of operating hours for which the engine has been shown tomeet Federal emission requirements. For engines less than 225 cc displacement, Category C = 125 hours, B = 250 hoursand A = 500 hours. For engines of 225 cc or more, Category C = 250 hours, B = 500 hours and A = 1000 hours.The displacement of QUANTUM Model Series 120000 engine is 190 cc.


3

BEFORE OPERATING ENGINE

Read entire Operating & Maintenance Instructions ANDthe instructions for the equipment this engine powers.*

Failure to follow instructions could result in serious injuryor death.

THE OPERATING & MAINTENANCE INSTRUCTIONSCONTAIN 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.

275177

The safety alert symbol ( ) is used to identify safetyinformation about hazards that can result in personal injury.

A signal word (DANGER, WARNING, or CAUTION) isused with the alert symbol to indicate the likelihood and thepotential severity of injury. In addition, a hazard symbolmay be used to represent the type of hazard.

DANGER indicates a hazard which, if notavoided, will result in death or serious injury.

WARNING indicates a hazard which, if notavoided, could result in death or serious injury.

CAUTION indicates a hazard which, if notavoided, might result in minor or moderateinjury.

CAUTION, when used without the alert symbol,indicates a situation that could result in damageto the engine.

HAZARD SYMBOLS AND MEANINGS

Explosion

Toxic Fumes

Moving Parts

Shock

Hot Surface

Kickback

Fire

WARNINGThe engine exhaust from this prod-uct contains chemicals known to theState of California to cause cancer,birth defects, or other reproductiveharm.

* Briggs & Stratton does not necessarily know what equipment this engine will power. For that reason, you should carefullyread and understand the operating instructions for the equipment on which your engine is placed.


4

SAFETY

WARNING

Gasoline and its vapors are extremely flammableand 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 fuelexpansion.

Keep gasoline away from sparks, open flames,pilot lights, heat, and other ignition sources.

Check fuel lines, tank, cap, and fittings frequentlyfor 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 EQUIPMENTWITH FUEL IN TANK Store away from furnaces, stoves, water heaters or

other appliances that have pilot light or otherignition source because they can ignite gasolinevapors.

WARNING

Unintentional sparking can result in fire or electricshock.

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

BEFORE PERFORMING ADJUSTMENTS ORREPAIRS 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

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 notstart engine.

Do not use pressurized starting fluids becausevapors are flammable.


5

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.

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 coolbefore touching.

Remove accumulated combustibles from mufflerarea and cylinder area.

Install and maintain in working order a sparkarrester before using equipment on forest-covered,grass-covered, brush-covered unimproved land.The state of California requires this (Section 4442of the California Public Resources Code). Otherstates may have similar laws. Federal laws applyon federal land.

WARNING

Rotating parts can contact or entangle hands, feet,hair, clothing, or accessories.

Traumatic amputation or severe laceration canresult.

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

Rapid retraction of starter cord (kickback) will pull handand arm toward engine faster than you can let go.

Broken bones, fractures, bruises or sprains couldresult.

When starting engine, pull cord slowly untilresistance is felt, then pull rapidly.

Remove all external equipment/engine loadsbefore starting engine.

Direct coupled equipment components such as,but not limited to, blades, impellors, pulleys,sprockets, etc., must be securely attached.


6

ENGINE INFORMATION

1. Primer bulb (if equipped)2. Carburetor3. Spark plug wire4. Cylinder area5. Muffler/(Muffler guard, if equipped)/

(Spark arrester, if equipped)6. Flywheel brake7. Engine Model Type Code

xxxxx xxxx xx xxxxxxxx

8. Oil fill/Dipstick9. Fuel tank

10. Air cleaner11. Fuel fill12. Finger guard13. Rope handle14. Side drain plug (if equipped)

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8

9

12

11

10

1

2

3

45

6

14

7

GENERAL INFORMATION

ENGINE MODEL

This is a single cylinder, L-head, air-cooled engine. It is alow emissions engine.

In the state of California, the 120000 series enginescovered in this manual are certified by the California AirResources Board to meet emissions standards for 125hours. Such certification does not grant the purchaser,owner or operator of this engine any additional warrantieswith respect to the performance or operational life of thisengine. This engine is warranted solely according to theproduct and emissions warranties stated elsewhere in thismanual.

MODEL SERIES 120000

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

Stroke 2-3/64 in. (51.99 mm). . . . . . . . . . . . . . . . . . . . . . . .

Displacement 11.57 cu. in. (189.6 cc). . . . . . . . . . . . . . . . .

Note: For practical operation, the horsepower loadingshould not exceed 85% of rated horsepower. Engine powerwill 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.

TUNE-UP SPECIFICATIONS

Armature air gap 0.006 0.010 in. (0.15 0.25 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 270962.Intake 0.005 0.007 in. (0.13 0.18 mm). . . . . . . . . . . . .

Exhaust 0.005 0.007 in. (0.13 0.18 mm). . . . . . . . . . .

THE INTERNATIONAL SYMBOLS USEDON THE ENGINE OR

IN THIS MANUAL INCLUDE:

On Off

Fuel Shutoff

Read OwnersManual

Stop Fuel

Choke

Safety Alert

Oil

Primer


7

OIL275177

CAUTION: This engine is shipped from Briggs &Stratton without oil. Check oil level beforestarting engine. If you start the engine without oil,the engine will be damaged beyond repair and willnot be covered under warranty.

OIL CAPACITYEngine holds approximately 5/8 quart (20 ounces; 0.6 liter).

TYPE OF OIL TO USE Use a high quality detergent oil classified For Service

SF, SG, SH, SJ or higher, such as Briggs & StrattonSAE 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, APIcertification mark and API service symbol(shown at left) with SJ/CF ENERGY CON-SERVING or higher, is an acceptable oil at alltemperatures. Use of synthetic oil does notalter required oil change intervals.

F -20 0 20 40 60 80 100C -30 -20 -10 0 10 20 30 40STARTING TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE

*

**

32

* CAUTION: Air cooled engines run hotter thanautomotive engines. The use of non-syntheticmulti-viscosity oils (5W-30, 10W-30, etc.) intemperatures above 40 F (4 C) will result in higherthan normal oil consumption. When using amulti-viscosity oil, check oil level more frequently.

** CAUTION: SAE 30 oil, if used below 40 F (4 C), willresult in hard starting and possible engine boredamage 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.

CAUTION: Do not overfill. Overfilling with oil may cause:Smoking,Hard starting,Spark plug fouling, orOil saturation of air filter.

[1] Place engine level andclean around oil fill area.

[2] Remove dipstick andwipe clean with cloth.

[3] Replace and tighten dip-stick. Remove and checkoil level.

Oil Fill

[4] Oil level should be atFULL line on dipstick.

[5] If needed, add oil slowly -recheck. Do not over fill.

[6] Replace and tighten dip-stick.


8

FUEL

TYPE OF FUEL TO USEUse clean, fresh, regular unleaded gasoline with a

minimum of 77 octane. Fresh fuel prevents gum fromforming in the fuel system or on essential carburetorparts. Purchase fuel in quantity that can be used within30 days.

For engine protection use Briggs & Stratton GasolineAdditive available from your Authorized Briggs &Stratton Dealer (P/N 5041 or single use pouch).

This engine is certified to operate on gasoline. ExhaustEmission Control System: EM (Engine Modifications).

Do not use gasoline which contains Methanol.Do not mix oil with gasoline.

CAUTION: Some fuels, called oxygenated or reformu-lated gasoline, are gasoline blended with alcohols orethers. Excessive amounts of these blends can damagethe fuel system or cause performance problems. If anyundesirable operating symptoms occur, use gasolinewith a lower percentage of alcohol or ether.

ADDING FUEL

WARNINGFuel Fill Note: Remove and

discard blue plug infuel fill.

[1] Remove cap. Fill tank to approximately 1-1/2inches below top of neck to allow for fuelexpansion. Be careful not to overfill.Briggs & Stratton Smart-fill fuel can fills to thecorrect level and automatically shuts off, reducingspills and emissions.

[2] Replace cap before starting.

Fill fuel tank outdoors or in well-ventilated area,away from sparks, open flames, pilot lights, heat,and other ignition sources.

If fuel spills, wait until it evaporates before startingengine.

Turn engine OFF and let engine cool at least 2minutes before removing gas cap.

STARTING

WARNING

Do not use pressurized starting fluids. Vapors are flammable.

Smoking, Hard starting, Spark plug fouling, Oil saturation of air filter.

CAUTIONIf engine is tipped to transport equipment, remove grass,drain oil, etc., keep spark plug side of engine up.Tipping engine with spark plug down may cause:

KEEP SPARK PLUG UP

STARTING AND OPERATING TIPSStore 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.)Start lawn mower on hard surface or over previously

cut grass.

Periodically remove grass buildup under mowerdeck. (See Maintenance.)

After engine has started, let it warm up severalseconds to several minutes, depending on outsidetemperature.

For maximum performance and life, operate enginewith choke (if equipped) in RUN and throttle in FAST.


9

STARTING AND STOPPING

REWIND (MANUAL) STARTERTO START ENGINE

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

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

[3] Move throttle (if equipped) to FAST.Operate engine with throttle in FAST.

[4] Push stop switch (if equipped) to ON.

[5] Firmly push primer bulb 3times OR move chokecontrol lever to CHOKEposition.

Primer Choke

[6] Close safety brakehandle on lawn mowersand any other equipmentwith this feature.

[7] Grasp rope handle. Pull slowly untilresistance is felt, then pull rapidly tostart engine and avoid kickback.

[8] Allow engine towarm up. If chokeequipped:Slowly adjust to-ward RUN posi-tion. Wait untilengine runssmoothly beforeeach choke ad-justment.

WARNING

TO STOP ENGINE

CAUTION: Do not stop engine by moving chokecontrol to CHOKE. Backfire, fire or engine damagecould occur.

[1] Move throttle (if equipped) toSLOW, then release safetybrake control handle.

[2] Move throttle (if equipped)to SLOW, then to STOP.

OR

[3] Push stop switch (if equipped) to OFF.

[4] Close fuel shut-off valve (ifequipped).


10

STARTING AND STOPPING

ELECTRIC STARTER (if equipped)TO START ENGINE

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

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

[3] Move throttle (if equipped) toFAST.

[4] Operate engine with throttle inFAST position.

[5] Firmly push primer bulb 3times OR move choke controllever to CHOKE position.

Primer Choke

[6] Close safety brakehandle on lawn mowersand any other equipmentwith this feature.

CAUTION: To prolong starter life, useshort starting cycles (5 seconds maxi-mum, then wait one minute). Followequipment manufacturers recommen-dations for charging battery.

[7] Insert key and turn to START.

[8] Allow engine to warm up. If choke equipped: Slowly adjusttoward RUN position. Wait untilengine runs smoothly before eachchoke adjustment.

TO STOP ENGINE

[1] Move throttle (if equipped) toSLOW, then release safetybrake control handle.

[2] Move throttle (if equipped)to SLOW.

OR

[3] Turn key to OFF. Remove key andstore out of reach of children.

[4] Close fuel shut-off valve (ifequipped).


11

MAINTENANCE

MAINTENANCERegular maintenance will improve the performance andextend the life of the engine. See any Authorized Briggs &Stratton Dealer for service. Use only genuine Briggs &Stratton parts. Other parts may not perform as well,may damage the engine, and may result in injury. Inaddition, use of other parts may void your warranty.

EMISSION CONTROLMaintenance, replacement or repair of the emissioncontrol devices and systems may be performed by anynonroad engine repair establishment or individual.However, to obtain no charge repairs under the terms andprovisions of the Briggs & Stratton warranty statement, anyservice or emission control part repair or replacement mustbe performed by a factory authorized dealer.

Task

Perform task at hourlyor calendar interval,

whichever comes first.

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Check oil level

Change oil *

Service air cleaner **

Inspect spark arrester (if equipped)

Replace spark plug

Replace in-line fuel filter(if equipped)

Clean debris ***

Clean air cooling system *****

Clean combustionchamber

* Change oil after first 5 to 8 hours of use, then every 50hours or every season. Change oil every 25 hours whenoperating the engine under heavy load or in hightemperatures.

** Clean more often under conditions of dust or airborne debris.Replace air cleaner parts, if very dirty.

*** On string trimmer applications: clean debris at each refueling, sooner if needed (seeCLEANING DEBRIS section); have qualified technician clean air cooling system every 30hours, every season, or sooner if needed, especially in highdebris conditions (see AIR COOLING SYSTEM section).

CAUTION: Used oil is a hazardous waste prod-uct. Dispose of used oil properly. Do not discardwith household waste. Check with your localauthorities, service center, or dealer for safedisposal/recycling facilities.

CHANGING OIL

[1] Before tipping engine orequipment to drain oil, drainfuel from tank by runningengine until fuel tank isempty.

[2] Disconnect spark plug wire and keep it away fromspark plug.

[3] With engine OFF but still warm remove dipstick.

[4] Top oil drain, keep air cleaner above oil outlet.Bottom or side oil drain (if equipped), keep enginelevel. Drain oil into appropriate receptacle.

Note: Top oil drain is recommended method, howeveroil can drain from side (if equipped) or bottom as shown.

[5] Place engine level. Add about 5/8 quart(20 ounces: 0.6 liter) new oil. Fill to FULL line ondipstick. Do not overfill.

[6] Replace dipstick.

WARNING

AIRCLEANER

BOTTOM OIL DRAIN

RATCHETAND

EXTENSION

CUTTINGBLADE

OILDRAINPLUG

DRAINPLUGS

PIPE

3/8SQUARE

TOP OIL DRAIN

SIDE OIL DRAIN (IF EQUIPPED)

WARNING Unintentional sparking can resultin fire or electric shock.

Unintentional start-up can result inentanglement, traumatic amputa-tion, or laceration.


12

MAINTENANCE

AIR CLEANERAll engines have an air cleaner cartridge. The cartridge iseither flat or oval (see illustrations). In addition, someengines have a pre-cleaner.Pre-cleanerTo clean pre-cleaner (if equipped), separate it fromcartridge and wash in liquid detergent and water. Air drythoroughly. Do not oil. Re-assemble dry pre-cleaner onclean cartridge.

CAUTION: Do not use pressurized air orsolvents to clean cartridge. Pressurized air candamage cartridge; solvents will dissolve car-tridge.

REMOVING AND RE-INSTALLING FLAT AIRCLEANER

Flat Air Cleaner

SCREWCOVER

BASE

CARTRIDGEP/N 491588

OR P/N 5043

CARTRIDGELIP

ASSEMBLE SOCARTRIDGE LIPTOUCHES BASEIN DIRECTION

SHOWN

PRE-CLEANER LIP

TABS AND SLOTS

PRE-CLEANERP/N 493537

[1] Loosen screw and tilt cover down.

[2] Remove air cleaner.

[3] Re-install clean (or new) air cleaner assembly insidecover. Lip of pre-cleaner (if equipped) must be atbottom of cartridge pleats.

[4] Insert covers tabs into slots in bottom of base.

[5] Tilt cover up into place and tighten screw.

REMOVING AND RE-INSTALLING OVAL AIRCLEANER

Oval Air Cleaner

ASSEMBLE SO THATCARTRIDGE LIP

SITS INSIDE BASE

2 SCREWS

COVER

BASE

CARTRIDGEP/N 497725

PRE-CLEANER273185

[1] Loosen two screws and lift off cover.

[2] Remove air cleaner assembly (pre-cleaner, ifequipped, and cartridge) from base.

[3] Re-install clean (or new) air cleaner assembly in base.Air cleaner must fit securely in base.

[4] Place cover over air cleaner and tighten screws.

REPLACE FUEL FILTER (IF EQUIPPED)

PART NO. 298090OR 5018

FUEL FILTER

FUEL HOSE CLAMPS

[1] Disconnect spark plug wire and keep awayfrom spark plug.

[2] Drain fuel tank or close fuel shut-off valve be-fore replacing fuel filter. Otherwise, fuel canleak out, creating a fire/explosion hazard.

WARNING

Starting engine creates sparking.

Sparking can ignite nearby flammable gases.

Explosion and fire could result.


13

MAINTENANCE

ENGINE AND ENGINE PARTSWe recommend that you see an authorized Briggs & Stratton Service Dealer for all maintenance and service of the engineand engine parts. Use only genuine Briggs & Stratton parts.

WARNINGIf you perform any maintenance on the engine, first disconnect the spark plug wirefrom the spark plug, and disconnect the battery at the negative terminal (electricstarter engines only) to prevent unintentional sparking. Unintentional sparking canresult in fire or electric shock. Unintentional start-up can result in entanglement,traumatic amputation or laceration. Use only correct tools.

WARNING Do not strike the flywheel with a hammer or hard object because the flywheel may

later shatter during operation. Do not tamper with governor spring, links or other parts to increase engine speed.

MUFFLERReplacement parts for themuffler must be the same andinstalled in the same positionas the original parts, other-wise fire can occur.If muffler is equipped with sparkarrester screen, remove

screen for inspection. Replace screen if damaged or plugged.

WARNING

SPARK PLUGUse only Briggs & Stratton Spark Tester (part number19368) to check for spark.Note: In some areas, locallaw requires using resistorspark plug to suppressignition signals. If this en-gine was originallyequipped with resistorspark plug, use same typefor replacement.

.030 (0.76 mm)WIRE GAGE

RESISTOR P/N 802592STANDARD P/N 492167

COMBUSTION DEPOSITSWe recommend that after every 100-300 hours you havean authorized Briggs & Stratton Service Dealer removecombustion deposits from the cylinder, cylinder head, topof piston, and around valves.

FUEL SYSTEM

WARNINGReplacement parts for fuelsystem (cap, hoses, tanks,filters, etc.) must be the sameas original parts, otherwisefire can occur.

AIR COOLING SYSTEMOver time debris may accumulate in cylinder cooling finsand cannot be observed without partial engine disassem-bly. For this reason, we recommend that you have anauthorized Briggs & Stratton Service Dealer clean the aircooling system per recommended intervals. (See Mainte-nance Schedule on page 12.) Equally important is to keeptop of engine free from debris. See cleaning debris below.

CLEANING DEBRISEngine parts should be keptclean to reduce the risk ofoverheating and ignition of accu-mulated debris. This is especial-ly important if cutting tall grass.

WARNING CAUTION: Do not use water to clean engineparts. Water could contaminate fuel system. Use abrush or dry cloth.

Finger Guard Linkage, Springs, Controls Muffler

CLEAN

Daily or before every use, cleangrass, chaff or accumulated de-bris from engine in areas shown.Keep area around and behindmuffler free of any combustibledebris.

Note: On string trimmer applica-tions, clean accumulated debrisat each refueling, sooner ifneeded.

CLEAN

CLEAN

CLEANCLEAN

CLEAN

CLEAN


14

ADJUSTMENTS

THROTTLE ADJUSTMENTIf the engine does not start or if it runs roughly, the remotethrottle control may need adjustment. See your authorizedBriggs & Stratton dealer or follow the instructions below.

WARNING

Prevent unintentional starting.

Before performing adjustments:

Remove spark plug wire from spark plug. Disconnect battery at negative terminal (only

engines with electric start).

TO ADJUST REMOTE THROTTLE*

[1] Loosen casing clamp screw.

[2] Move governor control lever, wire, and casing asfar as possible in direction shown.

[3] Move remote throttle control to FAST.

[4] Tighten casing clamp screw.

[5] Move throttle to STOP (if equipped).

GOVERNORCONTROL

LEVER

CASINGCLAMPSCREW

WIRE &CASING

* On some models the governor lever is bent into positionand is not adjustable.

TO ADJUST STOP SWITCH

[1] Governor control lever should make good contactwith stop switch (see illustration). Readjust ifnecessary.

[2] Check operation of throttle.

GOVERNORCONTROL

LEVERSTOP

SWITCH

CARBURETOR ADJUSTMENT

WARNING

The manufacturer of the equipment on which thisengine is installed specifies top speed at which theengine will be operated. DO NOT EXCEED this speed.

The carburetor on this engine is not adjustable.

Note: Engines operated at about 3000 to 5000 feet (900 to1500 meters) above sea level may require a high altitudecarburetor main jet. If erratic performance is observed,contact a Briggs & Stratton Authorized Service Dealer forcost to install/purchase a high altitude carburetor main jet, ifavailable.


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SERVICE & STORAGE

PARTIAL LIST OF GENUINE BRIGGS &STRATTON PARTS

BRIGGS & STRATTONPART PART NO.Flat air cleaner cartridge 491588 -or- 5043Flat air cleaner pre-cleaner 493537Oval air cleaner cartridge 497725Oval air pre-cleaner 273185Oil 100005 -or- 100028Fuel Filter 298090 -or- 5018Gas additive 5041Resistor spark plug 802592Standard spark plug 492167Long life platinum spark plug 5062(used on most L-head engines)Spark plug wrench 89838Spark tester 19368Oil pump kit 5056(uses standard electric drill to remove oil from engine quickly)

SERVICESee an Authorized Briggs & Stratton Service Dealer. Eachone carries a stock of Genuine Briggs & Stratton Parts andis equipped with special service tools. Trained mechanicsassure expert repair service on all Briggs & Strattonengines. Only dealers advertising as Authorized Briggs &Stratton are required to meet Briggs & Stratton standards.When you purchase equipment powered by aBriggs & Stratton engine, you are assured ofhighly skilled, reliable service at more than30,000 Authorized Service Dealersworldwide, including more than 5,000 MasterService Technicians. Look for these signswherever Briggs & Stratton service is offered.

You may locate your nearest Authorized Briggs & StrattonService Dealer in our dealer locator map on our web site

or in the Yellow Pages

directory under Engines, Gasoline or GasolineEngines, or Lawn Mowers or similar category.

Note: Walking fingers logo and Yellow Pages are regis-tered trademarks in various jurisdictions.

An illustrated shop manual includescommon specifications and detailed in-formation covering adjustment, tune-upand repair of Briggs & Stratton singlecylinder, L-head, 4 cycle engines. It isavailable for purchase from an Autho-rized Briggs & Stratton Service Dealer oryou can order it from the factory. Write:Briggs & Stratton CorporationAttn: Service DivisionP. O. Box 1144Milwaukee, WI 53201

Part No. 270962


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SERVICE & STORAGE

STORAGEEngines stored over 30 days need special attention.

[1] To prevent gum from forming in fuel system or onessential carburetor parts:a) if fuel tank contains oxygenated or reformulatedgasoline (gasoline blended with an alcohol or anether), run engine until it stops from lack of fuel, or b) iffuel tank contains gasoline, either run engine until itstops from lack of fuel, or add a gasoline additive to thegas in the tank. (See parts list. Single use pouches ofgas additive are available from your service dealer.) Ifyou use a gas additive, run the engine for severalminutes to circulate the additive through the carburetor.Then, engine and fuel can be stored up to 24 months.

[2] While engine is still warm, change oil.[3] Remove spark plug and pour about 1/2 oz. (15 ml) of

engine oil into cylinder. Replace spark plug and crankslowly to distribute oil.

[4] Clean engine of surface debris, chaff or grass.

WARNING[5] Store in a clean, dry area.

Do not store in same areaas a stove, furnace, waterheater, or other appliancethat uses a pilot light orhas a device that cancreate a spark.

Engwnty1-03 - page 1 (Black)Screen angle and frequency: 45.0000, 150.0000

17

LIMITED WARRANTYBriggs & Stratton Corporation will repair or replace, free of charge, any part(s) of the engine that is defective in material or workmanship or both.Transportation charges on parts submitted for repair or replacement under this warranty must be borne by purchaser. This warranty is effective for thetime periods and subject to the conditions stated below. For warranty service, find the nearest Authorized Service Dealer in our dealer locator mapat www.briggsandstratton.com, or by calling 1-800-233-3723, or as listed in the Yellow Pages.

THERE IS NO OTHER EXPRESS WARRANTY. IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR APARTICULAR PURPOSE, ARE LIMITED TO ONE YEAR FROM PURCHASE, OR TO THE EXTENT PERMITTED BY LAW ANY AND ALL IMPLIEDWARRANTIES ARE EXCLUDED. LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES ARE EXCLUDED TO THE EXTENTEXCLUSION IS PERMITTED BY LAW. Some states or countries do not allow limitations on how long an implied warranty lasts, and some states orcountries 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.

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Consumer Use 2 years 2 years

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* Note the following special warranty periods: 2 years for Classic engines in the European Union and Eastern European countries, for all consumer products inthe European Union, and for emission control systems on engines certified by EPA and CARB. 5 years for consumer use, 90 days for commercial use of Touch-N-Mow starter on Quantum and Intek engines. Engines used in competitive racing or on commercial or rental tracks are not warrantied.

The warranty period begins on the date of purchase by the first retail consumer or commercial end user, and continues for the period of time stated in the tableabove. Consumer use means personal residential household use by a retail consumer. Commercial use means all other uses, including use for commercial,income producing or rental purposes. Once an engine has experienced commercial use, it shall thereafter be considered as a commercial use engine for pur-poses of this warranty.

NO WARRANTY REGISTRATION IS NECESSARY TO OBTAIN WARRANTY ON BRIGGS & STRATTON PRODUCTS. SAVE YOUR PROOF OF PURCHASERECEIPT. IF YOU DO NOT PROVIDE PROOF OF THE INITIAL PURCHASE DATE AT THE TIME WARRANTY SERVICE IS REQUESTED, THEMANUFACTURING DATE OF THE PRODUCT WILL BE USED TO DETERMINE THE WARRANTY PERIOD.

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EMISSION CONTROL WARRANTY COVERAGE IS APPLICABLE TO CERTIFIED ENGINES PURCHASED IN CALIFORNIA IN 1995 AND THERE-AFTER, WHICH ARE USED IN CALIFORNIA, AND TO CERTIFIED MODEL YEAR 1997 AND LATER ENGINES WHICH ARE PURCHASED ANDUSED ELSEWHERE IN THE UNITED STATES (AND AFTER JANUARY 1, 2001 IN CANADA).

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The California Air Resources Board (CARB), U.S.EPA and B&S are pleased to explain the EmissionControl System Warranty on your model year2002 and later small off-road engine (SORE). InCalifornia, new small off-road engines must be de-signed, built and equipped to meet the Statesstringent anti-smog standards.

Elsewhere in the United States, new non-road,spark-ignition engines certified for model year1997 and later must meet similar standards setforth by the U.S. EPA. B&S must warrant the emis-sion control system on your engine for the periodsof time listed below, provided there has been noabuse, neglect or improper maintenance of yoursmall off-road engine.

Your emission control system includes partssuch as the carburetor, air cleaner, ignition sys-tem, muffler and catalytic converter. Also in-cluded may be connectors and other emissionrelated assemblies.Where a warrantable condition exists, B&S willrepair your small off-road engine at no cost toyou including diagnosis, parts and labor.

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Small off-road engines are warranted relative to emission control parts defects for a period of two years, subject to provisions set forth below. If anycovered part on your engine is defective, the part will be repaired or replaced by B&S.

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As the small off-road engine owner, you are re-sponsible for the performance of the requiredmaintenance listed in your Operating and Main-tenance Instructions. B&S recommends thatyou retain all your receipts covering mainte-nance on your small off-road engine, but B&Scannot deny warranty solely for the lack of re-ceipts or for your failure to ensure the perfor-mance of all scheduled maintenance.

As the small off-road engine owner, you shouldhowever be aware that B&S may deny you war-ranty coverage if your small off-road engine or apart has failed due to abuse, neglect, impropermaintenance or unapproved modifications.You are responsible for presenting your smalloff-road engine to an Authorized B&S ServiceDealer as soon as a problem exists.

The undisputed warranty repairs should becompleted in a reasonable amount of time, notto exceed 30 days.If you have any questions regarding your war-ranty rights and responsibilities, you should con-tact a B&S Service Representative at1-414-259-5262.The emission warranty is a defects warranty.Defects are judged on normal engine perfor-mance. The warranty is not related to an in-useemission test.

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The following are specific provisions relative to your Emission Control Defects Warranty Coverage. It is in addition to the B&S engine warranty for non-regulated engines found in the Operating and Maintenance Instructions.1. Warranted Parts

Coverage under this warranty extends onlyto the parts listed below (the emission con-trol systems parts) to the extent these partswere present on the engine purchased.a. Fuel Metering System

Cold start enrichment system Carburetor and internal parts Fuel Pump

b. Air Induction System Air cleaner Intake manifold

c. Ignition System Spark plug(s) Magneto ignition system

d. Catalyst System Catalytic converter Exhaust manifold Air injection system, Pulse valve

e. Miscellaneous Items Vacuum, temperature, position,

time sensitive valvesand switches

Connectors and assemblies

2. Length of CoverageB&S warrants to the initial owner and eachsubsequent purchaser that the WarrantedParts shall be free from defects in materialsand workmanship which caused the failureof the Warranted Parts for a period of twoyears from the date the engine is delivered toa retail purchaser.

3. No ChargeRepair or replacement of any WarrantedPart will be performed at no charge to theowner, including diagnostic labor whichleads to the determination that a WarrantedPart is defective, if the diagnostic work isperformed at an Authorized B&S ServiceDealer. For emissions warranty servicecontact your nearest Authorized B&S Ser-vice Dealer as listed in the Yellow Pagesunder Engines, Gasoline, Gasoline En-gines, Lawn Mowers, or similar category.

4. Claims and Coverage ExclusionsWarranty claims shall be filed in accordancewith the provisions of the B&S Engine War-ranty Policy. Warranty coverage shall be ex-cluded for failures of Warranted Parts whichare not original B&S parts or because ofabuse, neglect or improper maintenance as

set forth in the B&S Engine Warranty Policy.B&S is not liable to cover failures of War-ranted Parts caused by the use of add-on,non-original, or modified parts.

5. MaintenanceAny Warranted Part which is not scheduledfor replacement as required maintenance orwhich is scheduled only for regular inspec-tion to the effect of repair or replace as nec-essary shall be warranted as to defects forthe warranty period. Any Warranted Partwhich is scheduled for replacement as re-quired maintenance shall be warranted as todefects only for the period of time up to thefirst scheduled replacement for that part. Anyreplacement part that is equivalent in perfor-mance and durability may be used in the per-formance of any maintenance or repairs.The owner is responsible for the perfor-mance of all required maintenance, as de-fined in the B&S Operating and MaintenanceInstructions.

6. Consequential CoverageCoverage hereunder shall extend to the fail-ure of any engine components caused bythe failure of any Warranted Part still underwarranty.

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6,325,0366,284,1236,260,5296,230,6786,202,6166,116,212

6,077,0636,064,0276,014,8085,894,7155,852,9515,823,153

5,819,5135,813,3845,765,7135,645,0255,642,7015,619,845

5,606,9485,606,8515,548,9555,546,9015,503,1255,501,203

5,497,6795,320,7955,271,3635,269,7135,265,7005,243,878

5,235,9435,197,4255,197,4225,191,8645,188,0695,186,142

5,138,9965,086,8905,070,8295,058,5445,040,6445,009,208

4,996,9564,977,8794,971,2194,895,1194,819,5934,719,682

4,633,5564,630,4984,522,0804,520,2884,512,4994,453,507

4,430,984 DES. 308,871DES. 308,872DES. 309,457DES. 356,951DES. 361,771DES. 375,963


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quantum operating & maintenance instructions

Documents

engine information

engine maintenance information

engine model

hours of actual engine

engine emission label

emissions durabilityperiod

specific engine family

emission compliant