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****** Page 1 ****** BRIGGS & STRATTON Operating and Maintenance Instructions for Model Series 233400 (9 MP) 243400 (10 HP) 326431 (16 HP) ltäHp 10 HP Briggs & Stratton Corporation Milwaukee, Wisconsin 53201 O Copyright 1989 by Briggs & Stratton Corporation FORM NO. 270373-7/91 PRINTED IN US A
****** Page 2 ****** IMPORTANT SAFETY INFORMATION AND INSTRUCTIONS FOR ENGINE SELECTION ENGINE INSTALLATION ENGINE OPERATION Keep these instructions for future reference. In the USA and Canada, our 24 hour hotline is: 18002333723 Briggs & Stratton Corporation Milwaukee, Wisconsin 53201 briggsandstratton.com Before installing and operating this engine read and observe all warnings, cautions and instructions on both sides of this sheet, on the engine, and in the operating & maintenance instructions. NOTE: This sheet of instructions and safety information is not meant to cover all possible conditions and situations that may occur. Read entire Operating & Maintenance Instructions for this engine AND the instructions for the equipment this engine powers. Failure to follow instructions and safety information could result in serious injury or death. (A) 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 Toxic Fumes Explosion Hot Surface Kickback Moving Parts Shock (OVER) FORM MS-6445-01/03
****** Page 3 ****** ENGINE SELECTION A WARNING Failure to select the correct engine could result in fire or explosion. Some engines are unique and designed for specific applications or types of equipment. If this engine will be used to build new equipment, contact Briggs & Stratton to ensure that the engine is appropriate for the intended use. Note: For all Go-karts use only a model 136200 series en- gine, which offers improved safety and performance. Replacement engines should be the same model as the original engine, or be the Briggs & Stratton designated replacement engine. Refer to the Operation & Maintenance Instructions for engine identification information. Note: For all Go-karts use only a model 136200 series en- gine, which offers improved safety and performance. Do not use Briggs & Stratton engines on 3-wheel All-Terrain Vehicles (ATVs), motor bikes, air craft products, or vehicles intended for use in competitive events. Briggs & Stratton does not approve of or authorize such uses. ENGINE INSTALLATION AWARNING AWARNING AWARNING AWARNING All engine parts, including fuel cap, spark plug, muffler, air cleaner, and covers and guards for drive components (gears, belts, shafts, couplings, etc.) must be in place before attempt- ing to start engine. If engine is installed on walk behind lawn mower, all mower components, including cutting blade, must be correctly installed before attempting to start engine. When working on the engine or equipment, remove spark plug wire from spark plug. For electric start, remove negative wire from battery. Do not check for spark with spark plug removed. Use Briggs & Stratton spark tester #19368.       Do not attempt to install this engine if you do not have the appropriate tools and knowledge of small engine installation procedures. Use only Briggs & Stratton parts. Contact your Authorized Setvice Dealer for assistance. Do not modify the engine in any way without Briggs & Stratton factory approval. Any such modification is at the owner’s sole risk. If the exhaust system on the old engine was supplied by the equipment manufacturer, you must transfer the exhaust system and related components (original muffler and related pipes, brackets, clamps, and shields) to the new engine. All components must be in good condition. AWARNING AWARNING AWARNING Install muffler (and muffler de- flector if used) so outlet points away from operator, fuel tank, and equipment, and so muffler heat will not damage or deform engine and components. Ensure all fuel lines and fittings are properly assembled and do not leak. Replacement parts must be the same model as the original. Ensure all wiring, including safe- ty switches and engine shut-off components are completely installed and functioning proper- Set engine speed to equipment manufacturer’s specification. Refer to equipment manufacturer’s manual. Do not tamper with govemor springs, or other parts that will increase engine speed above specification. ENGINE OPERATION 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. Fill tank to about 1 inch below lowest portion of neck to allow for fuel expansion. Keep gasoline away from sparks, open flames, pilot lights, heat, and other ignition sources. When starting engine: Remove all external equipment/engine loads. Wait until spilled fuel is evaporated. Start engine outdoors. Pull cord slowly until resistance is felt, then pull rapidly. If engine floods, set choke to OPEN/RUN, place throttle in FAST and crank until engine starts. AWARNING When operating equipment: Do not tip engine or equipment at angle which causes gasoline to spill. Run engine outdoors. Do not run in enclosed area, even if doors or windows are open. Do not choke carburetor to stop engine. FORM MS-6445-01/03
****** Page 4 ****** In The Interest Of Safety BEFORE STARTING ENGINE, READ AND UNDERSTAND THE “OPERATING AND MAINTENANCE INSTRUCTIONS.” THIS SYMBOL MEANS WARNING OR CAUTION. DEATH, PERSONAL INJURY AND OR PROPERTY DAMAGE MAY OCCUR UNLESS INSTRUCTIONS ARE FOLLOWED CAREFULLY. 1 2. 3. 4 5. 6 7 8 9 10. 11 12. WARNING: DO NOT DO NOT run engine in an enclosed area Ex. haust gases contain carbon monoxide, an odor- less and deadly poison. DO NOT place hands or feet near moving or ro- tating parts. DO NOT store, spill, or use gasoline near an open flame, or devices such as a stove, furnace, or water heater which use a pilot light or devices which can create a spark, DO NOT refuel indoors where area is not well ventilated. Outdoor refueling is preferred. DO NOT fill fuel tank while engine is running. Al- low engine to cool tor 2 minutes before refuet• ing. Store fuel in approved safety containers. DO NOT remove fuel tank cap while engine is running DO NOT operate engine when smell of gasoline is present or other explosive conditions exist. DO NOT operate engine if gasoline is spilled Move machine away from the spill and avoid creating any ignition until the gasoline has evaporated. DO NOT transport engine with fuel in tank DO NOT smoke when filling fuel tank. DO NOT choke carburetor to stop engine. Whenever possible, gradually reduce engine speed before stopping. DO NOT run engine at excessive speeds. This may result in injury. 13. DO NOT tamper with governor springs, gover- nor links or other parts which may increase the governed engine speed. DO NOT tamper with the engine speed selected 14. by the original equipment manufacturer. 15. DO NOT check for spark with spark plug or spark plug wire removed. Use an approved tester. 16. DO NOT crank engine with spark plug removed. If engine is flooded, place throttle in “FAST” po- sition and crank untit engine starts. 17. DO NOT strike flywheel with a hard object or metal tool as this may cause flywheel to shatter in operation. Use proper tools to service engine. 18. DO NOT operate engine without a muffler. ln- spect periodically and replace, if necessary. If engine is equipped with muffler deflector, in- spect periodically and replace, if necessary, with correct detlector. 19. DO NOT operate engine with an accumulation of grass, leaves, dirt or other combustible mate- rial in the muffler area. 20. DO NOT use this engine on any forest covered, brush covered, or grass covered unimproved land unless a spark arrester is installed on the muffler. The arrester must be maintained in ef. fective working order by the operator. In the State of California the above is required by law (Section 4442 of the California Public Ree sources Code). Other states may have similar laws. Federal laws apply on federal lands. 21. DO NOT touch hot muffler, cylinder, or fins be. cause contact may cause burns. 2 22. DO NOT run engine with air cleaner or air 1. 2. 3. 4. 5. 6. cleaner cover (or cover directly over carburetor air intake, if Sno/Gard engine) removed. WARNING: DO ALWAYS DO remove the wire from the spark plug when servicing the engine or equipment TO PREVENT ACCIDENTAL STARTING. Dis- connect the negative wire from the battery ter- mina! if equipped with a 12 volt starting system. DO keep cylinder fins and governor pans free of grass and other debris which can affect engine speed. DO pull starter cord slowly until resistance is felt. Then pull cord rapidly to avoid kickback and pre- vent hand or arm injury. DO examine muffler periodically to be sure it is functioning effectively. A worn or leaking muffler should be repaired or replaced as necessary. DO use fresh gasoline, Stale fuel can gum car- buretor and cause leakage. DO check fuel lines and fittings frequently for cracks or leaks. Replace if necessary. NOTE: Use Original Briggs & Stratton Service Re- placement Parts when servicing your engine. Briggs & Stratton Authorized Service Centers carry a Stock of such parts. The use of Briggs & Stratton parts pre- serves the original design of your engine. Imitation replacement parts offer potential risk including the risk of personal injury. Contact any Briggs & Stratton Authorized Service Center for Original Briggs & Stratton Replacement Parts.
****** Page 5 ****** Before Starting READ THE OPERATING INSTRUCTIONS OF THE EQUIPMENT THIS ENGINE POWERS. NOTE: Engine is shipped WITHOUT Oil, Change and Add Oil According to Chart below. We recommend the use of a high quality detergent oil classified “For Service SE. SF. SG,t• such as Briggs & Stratton 30 weight Oil. parl no. 100005, De- tergent oils keep the engine cleaner and retard the formation 01 gum and varnish deposits. No special additives should be used with recommended oils NOTE: DO NOT MIX OIL WITH GASOLINE. O o RANGE BEFORE NEXT Olt CHANGE Air cooled engines run hotter than automotive en- gines. Use of multi-viscosity oils (IOW•30. etc.) above 400 F (4c C) will result in high oil consump- tion and possible engine damage, Check oil level more frequently if using these types of oils. • SAE 30 oil. if used below F (4t C), witl result in hard staffing and possible engine bore damage due to Inadequate lubrication. TO FILL CRANKCASE-WLT-H-Q.IL: Capacity is approximately 2 quarts (64 ounces or 1.9 liters). Place engine ‘evet. Clean area around oil filli Remove oil fill plug or dipstick. POUR OIL SLOWLY, Fill to FIJI-L mark on dipstick or to over- flowing for oil fill plug. DO NOT OVER.FIL,I.. Re- place oil fill plug or dipstick ro CHECK LEVEL; Place engine level. If engine has oil fill plug check as shown in following figure. If engine has extended oil fill, remove and wipe oil from dipstick with clean cloth. Screw dipstick firmly into place. Remove to check oil level. Dipstick must be firmly assembled into ada ter when en ine is runnin OIL FILL PLUG OIL LEVEL OIL FILL PLUG PRESS BELLOWS LOOK FOR OIL HERE OIL-MINDER EXTENDED OIL FILL FUEL RECOMMENDATIONS This engine will operate satisfactorily on any gaso line intended for automotive use. A minimum of 77 octane is recommended, DO NOT MIX OIL WITH GASOLINE. Use clean, fresh, lead-free gasoline. Leaded gaso- line may be used if lead-free is not available. Use of lead•free gasoline results in fewer combustion de- posits and lonaer valve life. We recommend the use of Briggs & Stratton Gasoline Additive, part no. 5041. Purchase fuel in quantity that can be used within 30 days. This will assure fuel freshness and volatility tailored to the season. NOTE: We DO NOT recommend the use of gasoline which contains alcohol. such as gasohol. However, if gasoline with alcohol is used, it MUST NOT con• tain more than 10 percent Ethanol and MUST be re- moved from the engine during storage, DO NOT use asoline containing Methanol. See STORAGE IN- !TRUCTIONS. PO NOT FILL fuel tank to point of over- flowing. Allow approximately 1/4 in. (5 mm) of tank space for fuel expansion. 1. 2. 3. 4. 5. 6. 10 12V Electric Starter Fuel Tank Fuel Fill Oil Drain Plug Spark Plug Muffler 7 11 7. Mode}, Type and Code Numbers 8. Air Cleaner 9. Rope Starter 10. Carburetor 11. Rotating Screen 16 14 13 12. Oil Fill Plug 13. Crankcase 14. Crankshaft 15 15. Cylinder 16. Fuel Filter 3
****** Page 6 ****** Starting WARNING: ALWAYS KEEP HANDS AND FEET CLEAR OF MOWER BLADE OR OTHER ROTATING MACHINERY OPEN VALVE: Turn fuel shut-off valve to “ON” position if engine is so equipped -1′;- (SEVERAL TURNS) TO CHOKE TYPICAL CHOKE CONTROLS NOTE: If choke does not fully close, readjust equip- ment control (see ADJUSTMENT section). THROTTLE CONTROL: Move throttle control to “RUN’ or “FAST” position. FAST scow TYPICAL THROTTLE CONTROL BEWINP STARTER Grasp starter grip as illustrated and pull slowly until resistance is felt. Then pull cord rapidly to overcome compression, prevent kickback and start engine. Re• peat if necessary with choke opened slightly. When engine starts, open choke gradually. ROPE STARTER Wind the starter rope around the pulley in direction shown by arrow. Pull the rope with a quick full arm stroke to prevent kick. back. Repeat if necessary with choke opened slightly. When engine starts, open choke gradually. CAUTION: When using rope starter to crank engine, use caution so knotted end of rope does not strike persons standing nearby. 4 REWIND START ELECTRIC STARTER ROPE START OPEN (SEVERAL TURNS) TURN FUEL SHUT-OFF VALVES MOVE STOP SWITCH: Move stop switch away from spark plug or to position. if so equtpped PLUG STOP SWITCHES CHOKE ENGINE; •ONI’ Move engine or equipment control lever to •CHOKE” or ‘START” position. CAUTION: DO NOT operate engine with lever in parlial •CHOKE” position. Exces- Sive speeds may occur. NOTE: Battery. if engine is so equipped, is supplied by equipment manufacturer and may require charg•; ing before use. Turn switch to “START” or ‘ON” and press starter button Short starting cycles provide best starter life. Prolonged cranking (more than 15 seconds) can damage starter motor. Allow starter to cool 2 min• Utes. When engine starts, gradually open choke STARTER SWITCH DEPRESS BUTTON STARTER SWITCHES
****** Page 7 ****** Stopping COLD WEATHER STARTING HINTS 1 2. 3. 4. 5. 6. Start, store and fuel engine in a level position. DO NOT use a pressurized starting fluid. See vere engine damage may occur because of loss of lubrication. Use correct oil for the temperature expected. Do not use gasoline left over from summer. Use fresh winter grade fuel, which has higher volatif• ity. to improve starting, De-clutch all possible external loads. A slightly richer fu el mixture will usually improve cold starting (below 400 F). Turn needle valve 1/8 turn counterclockwise. TO STOP ENGINE: Move equipment control lever to OSLOW” and then “STOP” position. Turn key to “C)FV position, if so equipped, Do not choke carburetor to stop engine. Backfire or engine damage may result if choke is used to stop engine. STOP SWITCH, 9 ARK PLUG THROTTtE FAST SLOW STOP TYPICAL STOP CONTROLS CAUTION: Always remove key from switch when leaving equipment unat• tended or when equipment is not in use. NOTE: Close fuel shut-off valve when equipment is transported or not in operation to prevent fuel leak- age Adjustments ENGINE ANP EQUIPMENT CONTROLS CAUTION: The manufacturer of the equip- ment on which the engine is installed specifies the Top No-Load RPM at which the engine will be operated. DO NOT EX- CEED this RPM. Correct control adjustment is necessary for good engine performance. TO CHECK REMOTE CHOKE CONTROLS: Move equipment choke control lever,if so equipped to “CHOKE” position. Choke valve should fully close. If it does not. follow adjustment instructions below. REMOTE CHOKE CONTROLS TO APJUST REMOTE CHOKE CONTROLS: With equipment choke control lever in “CHOKE” po- sition, loosen casing clamp screw and move choke lever until choke closes completely. Tighten casing clamp screw. 5 ADJUSTABLE GOVERNOR CONTROLS: For adjustment of adjustable governor controls. see any Briggs & Stratton Authorized Service Center. ADJUSTABLEGOVERNOR TO CHECK REMOTE THROTTLE CONTROLS: Move equipment throttle control ‘ ‘B’ i to “FAST” po- sition. Lower elastic nut on control rod must contact air guide at If it does not. follow adjustment in. structions below. REMOTE CONTROLS ro ADJUST REMOTE THROTTLE CONTBO(S; With equipment throttle control “B” in “FAST” posi- tion, loosen casing clamp nuts Move casing until lower elastic nut on control rod contacts air guide at Tighten casing clamp nuts “A.”
****** Page 8 ****** Adjustments CARBURETOR ADJUSTMENTS Minor carburetor adjustment may be required to compensate for d’fferences in fueli temperature. al. titude or load, Atr cleaner and air cleaner cover must be assembled to carburetor when running engine Gently turn valves clockwise until they IVSI close Turning valves Jn too far may damage them. Next open needle valve 1—1/2 turns counterclock- wtse and Idle mixture valve 1 turn counterclockwise This initial adjustment will permit the engine to be started and warmed up (approximately 5 minutes) rior to final ad ustment. Maintenance CAUTION: TO PREVENT ACCIDENTAL STARTING when servicing the engine or equipment, always remove wire from the spark plug and insert in holding tab. Dis. connect negative wire from battery termi• nalt if equipped with 12 volt starting sys- tem. CHECK OIL LEVEL REGULARLY; Check after each 5 hours of operation or daily. BE SURE OIL LEVEL IS MAIN- TAINE-D CHANGE OIL AS RECOMMENDED: Change oil after first 5 hours of operation. Then, un• der normal operating conditions, change oil after every 50 hours of operation or every season, which. ever occurs first. Change oil after every 25 hours of operation if the engine is operated under heavy load, or in high ambient temperatures. Oil is drained trom bottom of engine as shown. Change oil while engine is warm. Refill with new oil of correct grade. Replace drain plug and oil fill plug or dipstick. CHANGE OIL (Gear Reduction Option): The reduction gears are lubricated by engine crank. case oil. Remove drain plug from gear case cover to drain oil remaining in gear case when crankcase oil is changed. Replace drain plug. IDLE SPEED ADJUSTING scnEw THROTTLE STOP NEEDLE VALVE (HIGH SPEED) IDLE MIXTURE ) VALVE TO OPEN THROTTLE CARBURETOR ADJUSTMENTS FINAL ADJUSTMENT: Place throttle control in “FAST” position. Turn nee• dje valve in (clockwise • lean mixture) until engine to slow. Then turn it out (rich mixture) until en. gine starls to run unevenly. Now turn needle valve midway between rich and lean. Next, adjust idle RPM. Rotate throttle counterclockwise and hold against stop while adjusting idle speed screw to ob. tain 1200 RPM Holding throttle against throttle stop, turn idle mixture valve in (lean) and out (rich). Set midway between rich and lean. Recheck idle RPM and readjust if required. Release throttle, Engine should accelerate smoothly. If it does not, carbure. tor should be readjusted, usually to a slightly richer mixture. OIL DRAIN PLUG OIL DRAIN OIL FILL PLUG —r OIL LEVEL OIL FILL 6
****** Page 9 ****** Maintenance SERVICE AIR CLEANER ELEMENT AIR CLEANERS: Service pre—cleaner. if so equipped, every 25 hours or every season, whichever occurs first. Service cartridge every 100 hours or every season, whichever occurs first. if equipped with pre-cleaner. Service cartridge every 25 hours or every season, whichever occurs first, if NOT equipped with pre— cleaner. NOTE: Service more often under dusty conditions. 1. Remove knob/wing nut and cover. 2, Carefully remove foam pre•cleaner, when so equipped Tp service pre-cleaner: a. Wash in liquid detergent and water. b. Squeeze dry in a clean cloth. c. Saturate in engine oil, Squeeze in clean, absorbent cloth to remove ALL excess oil. TQ service cartridgp: a. b. c. Remove wing nutt cup and cartridge Clean by tapping gently on a flat surface. If very dirty, replace or wash in a none sudsing detergent and warm water solu- tion. Rinse thoroughly with flowing water from mesh side until water is clear. Allow cartridge to stand and air dry thoroughly before using CAUTION: Petroleum solvents, such as kerosene. are not to be used to clean car. tridge. They may cause deterioration of the canridge. DO NOT OIL CARTRIDGE. DO NOT USE PRESSURIZED AIR TO 3. CLEAN OR DRY CARTRIDGE. Reinstall cartridge, cover. wing nut, cup, pree cleaner and cover. Tighten knob/wing nut. WING NUT (UPPER) COVER PRE.CLEANER P/N 271794 WING NUT ……..r.-…….rrf CARTRIDGE P/N 393957 ROUND DUAL ELEMENT 7 OIL FOAM AIR CLEANER: Clean and re—oil foam element every 25 hours or every season, whichever occurs first. NOTE: Service more often under dusty conditions. 1, Remove wing nut and cover. 2. Carefully remove air cleaner to prevent dirt trom falling into carburetor, 3 Take air cleaner apart and clean all parts. a. Wash foam element in kerosene or liquid detergent and water to remove dirt. b. Squeeze dry in a clean cloth. c Saturate foam in engine oil. Squeeze in clean cloth to remove ALL excess oil. NOTE: For correct foam element replacement see any Authorized Briggs & Stratton Service Center. 4. Reassemble parts and fasten securely to carbu- retor with wing not. WING NUT COVER FOAM ELEMENT PIN 270093 OR P/N 270209 cup BASE GASKET OIL FOAM AIR CLEANER
****** Page 10 ****** Maintenance CLEAN ENGINE: Remove dirt and debris with a cloth or brush. Cleaning With a forceful spray of water is not recommended as water could contaminate the fuel system CLEAN ROTATING SCREEN; Grass or chaff may clog rotating screen or debris gard. especially during prolonged operation or when cutting tall grass. Clean the area shown as often as needed to prevent overheating and engine damage. ROTATING SCREEN ROTATING SCREEN REPLACE FUEL Replace In-Line fuel filter or clean screen and bowl every season. Contact any Briggs & Stratton Authorized Service Center for correct replacement. SEE PAGE 10 FOR PART NOS. FUEL FILTER BOWL YOKE SCREEN SCREEN & BOWL CAUTION: TO assure smooth operation, keep governor linkage, springs and cone trols free of debris. CAUTION Periodically clean muffler area to remove all grass, dirt and combustible debris. CLEAN COOLING SYSTEM: Grass, chaff or dirt may clog the rotating screen and the air cooling system, especially after prolonged service cutting dry grasses. After every 100 hours or every season, whichever occurs first, clean internal cooling fins and sudaces as shown to prevent over- speeding, overheating and engine damage. Clean more often if necessary. CLEAN OUT CHAFF AND DIRT COOLING SYSTEM 8 REPLACE OR CLEAN SPARK PLUG: Replace or clean after every 100 hours of operation or every season, whichever occurs first. (.76 mm) FEELER GAUGE STANDARD P/N 492167 RESISTOR P/N 802592 SPARK PLUG NOTE: Do not blast clean spark plug. Spark pluq: should be cleaned by scraping or wire brushing and washing with a commercial solvent. CAUTION: Sparking can occur if wire minal does not fit firmly on spark plug. Re: form terminal if necessary. CLEAN SPARK ARRESTER SCREEN: If engine muffler is equipped with spark arrestg screen assembly, remove every 50 hours or every season, whichever occurs first, for cleaning and ifr spection. Replace if damaged. Contact any Briggs 8 Stratton Authorized Service Center. REMOYE COMBUSTION DEPOSITS: Remove cylinder head every 100-300 hours o operation. Scrape and wire brush the combusto deposits from cylinder, cylinder head, top of pistot and around valves. Reassemble gasket and cylin der head. Turn screws down finger tight with thre( longer screws around exhaust valve, if so equipped Torque cylinder head screws in a staggered so’ quence to 190 in.-lbs. (21.5 Nm).
****** Page 11 ****** Maintenance Schedule Follow the hourly or calendar intervals, whichever occur first. More frequent service may be required. MAINTENANCE OPERATION Check Oil Level Change 01 Service Foam Pre–Cleaner. if so equipped. or Oil Foam@ Air Cleaner, Service Air Cleaner Cartridge (it no pre-cleaner) Service Air Cleaner Cartridge (if pre-cleaner present) Clean Cooling System Change Oil (Gear Reduction) Inspect Spark Arrester (Optional Accessory) Replace or Clean Spark Plug Replace In-Line Fuel Fitter Clean Combustion tb)sits Every 5 Hours or Dally 25 Hours or 50 Hours or Every Seeson Every Season Note 1 Note 2 Note 2 100 Hours or Every Season Note 2 100-300 Hours International Symbols Read Operator’s Manual Warning’Caution Oil Fuel Choke Fast Stow Air Cleaner • Change oil after hrst 5 hours, then after every 50 hours or every season. Note 1: Change oil every 25 hours when operating under heavy load or in high ambient temperatures. Note 2: Clean more often under dusty conditions or when airborne debris is present. BRIGGS & STRATTON AUTHORIZED SERVICE CENTERS ARE READY TO SERVE YOU AND ARE COMMITTED TO QUALITY SERVICE.
****** Page 12 ****** General Information This is a single cylinder, L-head, air-cooled engine. On mobile equipment. the engine will operate satis- factorily at any angle at which operator and equip• ment can function safely, MODEL SERIES 233400 Bore Stroke Displacement Torque (Maxo 3 in. (76.20 mm) 3-1/4 in. (82.55 mm) 22.94 cu. in. (376 5 cc) 1575 Ft *Lbs. @ 2400 RPM In some areas, local law requires the use of a resis• tor spark plug to suppress ignition signals. If an en- gine was originally equipped with a resistor spark plug, be sure to use the same type of spark plug for replacement. STORAGE INSTRUCTIONS Engines to be stored over 30 days need to be pro• tected or drained of fuel to prevent gum from forming in the fuel system or on essential carburetor parts. MODEL SERIES 243431 Bore Stroke Displacement Torque (Max ) Bore Stroke Displacement Torque (Max.) 3-1/16 in. (7779 mm) 3—1/4 in. (82.55 mm) 23.94 cu. in. (392.3 cc) 1655 FtAbs. @ 2400 RPM 3-9/16 in. (90 49 mm) 3-1/4 in. (8285 mm) 32 d CU. in. (530,9 CC) 25 8 Ft-Lbs. @ 2700 RPM NOTE: Engine power will decrease 3-1/20/0 for each 1 000 feet (305 m) above sea level and 1% for each 60 C) above F (160 C). TUNE-UP SPECIFICATIONS 1. 2. 3. 4. 5. For engine protection, we recommend the use of Briggs & Stratton Gasoline Additive, Part No. 5041. available from any Authorized Briggs & Stratton Service Center, Mix Additive with fuel in fuel tank or storage container. Run engine for a short time to circulate Additive through carbure- tori Engine and fuel can be stored up to 24 months. CAUTION: If Additive is not used or if en• gine is operating on gasoline containing al- cohol, remove all fuel from tank and run engine until it stops from lack of fuel. While engine is still warm. drain oil from crank- case. Refill with fresh oil. see OIL RECOM- MENDATIONS. Remove spark plug and pour approximately 1 oz. (30 ml) of engine oil into cylinder. Replace spark plug and crank slowly to distribute oil. Clean dirt and chaff from cylinder, cylinder head fins, blower housing, rotating screen and muffler areas. Store in clean and dry area. Your nearest Service Center may be located in the i’ Yellow PagesTM’S directory under “Engines, Gaso- line.” ‘*Gasoline Engines,” or similar category. You may also locate the Service Center in your mailing zip by telephoning code area 1-800-233-3723. There are over 30,000 Authorized Service Centers worldwide available to serve you. Each Authorized Service Center carries a stock ot Original Briggs & Stratton Service Replacement Parts and is equipped with special service too’s. Ask for Original Briggs & Stratton Service Replacement Parts. The use of Genuine Parts preserves the origi- i nal design of your Briggs & Stratton engine. Imita- tion replacement parts offer potential risks, not just obvious differences such as, fit, finish and warranty back, up, but hidden differences in internal construc• tion as well. Trained mechanics assure expert repair service on all Briggs & Stratton engines. Major engine repairs require proper tools and a thor- ough knowledge of internal combustion engine re- pair procedure. Briggs & Stratton publishes illustrated shop manu- a’s, parts lists and owner’s manuals for every engine ft. it manufactures. To receive a list of available publi- cations, write to Briggs & Stratton Corporation, P, O. Box 1144, Milwaukee, WI 53201, Attention: Service Air cleaner (Cartridge) Air cleaner (Predeaner) Air cleaner (Oil Fuel Filter (w/o Fuel Pump) Fuel Filter (w Fuel Pump) B & S PART NC). 393957 271794 (See page 7) 298090 394358 Standard spark plug (Champion Jl 91M) 492167 Resistor spark plug (Champion RJI 9LM) . 802592 CLEARANCES Spark Plug Gap Intake Valve’ Exhaust Valve• DIMENSION .030 in (76 mm) .007-09 in. (.18-m mm) 017-.019 in. ( 43- 48 mm) with valve springs installed and piston 1/4 in. (6 mm) past top dead center. Note Walking fingers logo and • Y ellow pages’ ate regis• tered trademarks In various lurisdlcbons SERVICE & REPAIR INFORMATION If service or repair is needed, contact a Briggs & Stratton Authorized Service Center. To serve you promptly and efficiently, a Service Center will need the modeu type and code numbers on your engine. 10 Division. The shop manual shown here includes “Theories of Operation, ” common specifications and detailed information covering the adjustment, tune-up and repair of Briggs & Stratton L•head, Singte cylinder, 4 cycle engines and is avail- able from any Briggs & Stratton Authorized serv- ice Center. You can also order directly from the face tory at the above address. Service and Repn/r Instructions Part No. 270962
****** Page 13 ****** ABOUT THE WARRANTY ON YOUR ENGINE NOTE: See Back Cover for Statement of Limited Warranty. If warranty service is needed, contact your nearest Authorized Briggs & Stratton Service Center. For prompt attention. your Center will need to know the engine model. type and code numbers, the trouble experienced and the total number of nours the engine was run BRIGGS & STRATTON WARRANTY COVERS ONLY DEFECTIVE MATERIAL and/or WORKMANSHIP Briggs & Stratton Corporation welcomes the opportunity to make justified war- •anty repairs by any Of its Authorized Service Centers. In most instances, the re• quests for warranty repair are handled in a quick and routine manner. However, some requests for warranty are received which appear not justified. In these cases. though engine owners may not be aware of it, the premature failure of their engine was caused by abuse or neglect, or the equipment on which it was mounted. rather than the engine l! you differ with the decision of your Service Center, investigation will be made to determine the applicability of warranty. Ask the Service Center to submit all sup- Dorling facts to his Distributor for review. II the Distributor decides that your claim IS justified. you witl be fully reimbursed for those items accepted as defective. In any event. all decisions regarding warranty applicability will be made in the sole discretion of Briggs and Stratton To avoid misunderstanding which might occur between engine owners and Authorized Briggs & Stratton Service Centers, we list below some of the causes ot engine failure that Briggs & Stratton warranty does not cover tor repair or replacement. NORMAL WEAR: Engines, like all mechanical devices. need periodic parts serv- ice and replacement to perform well. Warranty will not cover repair when normal use has exhausted the life of a part or an engine. IMPROPER MAINTENANCE: Remember that the service life of an engine de- pends upon the conditions under which it operates and the care if receives. Some applications. such as tillers, pumps and rotary mowers. are very often used in dusty or dirty conditions which can cause what appears to be premature wear. Such wear, when caused by dirt, dust, spark plug cleaning grit or other abrasive material that has entered the engine because of improper maintenance, is not covered by warranty WARRANTY DOES NOT APPLY FOR SOME ADJUSTMENTS OR IF ABUSE OR NEGLECT CAUSES ENGINE DAMAGE: SUCH AS 1i Bent or broken crankshafts that could be caused by striking a solid object with the cutter blade of a rotary mower; 2. Sticking valves or clogged carburetors, fuel pipes or other damage caused by using contaminated or stale fuel (Use clean, fresh gasoline lead-free if avail- able.); Parts which are scored or broken because an engine was operated with insuf• 3. ficient or contaminated lubricating oil or an incorrect grade of lubricating oil. (4 cycle engines: check oil level daily or atter every 5 hours of operatiom Refill when necessary and change at recommended intervals.) (2 cycle engines• use correct mixture of gasoline and BIA/NMMA certified oil.): Parts damaged by overspeeding or overheating caused by did, grass or de- 4. bris plugging the cooling fins and clogging the flywheel area, or caused by op- erating the engine in a confined area without sufficient ventilation (Clean fins on the cylinder, cylinder head and flywheel at recommended intervals.); Damage or wear to pans caused by dirt whichentered the engine because of 5. improper air cleaner maintenance or re•assembly (At recommended inter- vals, clean and re•oil the oil-foam@ element or the foam pre-cleaner and/or clean or replace the cartridge); Damage or wear to pans caused by grit which entered the engine from spark 6. plugs cleaned on an abrasive blast cleaning machine; Tune.up or adjustment needed by an engine but not caused by defective ma- 7. terial nor workmanship (Follow the “Operating and Maintenance Instructions” when making any minor adjustments.)’, Parts broken by excessive vibration caused by loose engine mounting, loose 8, cutter blades unbalanced blades or impellers improperly attaching equipment to engine crankshaft, overspeeding or abuse in operation; Repair or adjustment of associated parts or assemblies such as clutches, 9. transmissions, remote controls, etc., which are not of Briggs 8 Stratton manu- facture; 10. PARTS THAT ARE NOT ORIGINAL BRIGGS & STRATTON PARTS OR PARTS THAT ARE NOT APPROVED BY BRIGGS & STRATTON WARRANTY AVAILABLE ONLY THROUGH SERVICE CENTERS WHICH HAVE BEEN AUTHORIZED BY THE BRIGGS 8 STRATTON CORPORATION YOUR NEAREST SERVICE CENTER IS LISTED IN THE “YELLOW PAGE-S’K@” OF YOUR TELEPHONE DIRECTORY, UNDER “ENGINES, GASOLINE” OR “GASOLINE ENGINES, LAWN MOWERS” OR SIMILAR CATEGORY. BRIGGS & STRATTON ENGINES ARE MADE UNDER ONE OR MORE OF THE FOLLOWING PATENTS: DESIGN 0-24781 77 (OTHER PATENTS PENDING) 4.971.219 4,971.001 4 939.916 4,915.068 4,909.218 4.895.119 4.889.006 4.875 448 4,823.752 4,819.593 4 17 77 4,745,895 4,694.792 4,684.917 4,622.935 414 4,453,507 4,430.984 4.3721433 4,355.253 4 4 89,040 4.188,930 81 ,206 4, 168,808 4, 168,288 4 4,031 ,872 4,011 ,533 4 1 3,981 ,289 3,971.353 3,970.913 3,9611724 3,958.906 3,951 ,223 3.827307 3,823.700 3,796.027 3,874.551 3,863,614 3,831268
****** Page 14 ****** Superseding Warranty BRIGGS & STRATTON ENGINE WARRANTY POLICY effective July 31, 1989 Replaces all undated previous Warranties and all Warranties dated before July 31, 1989 When warranty repatr is justified, Briggs & Stratton Corporation welcomes such repair by any of its Authorized Service Centers. In most instances. the requests for warranty brought to the attention of our Service Accounts are handled in a prompt routine manner with no question regarding their validity However. some requests for warranty are received which appear not justified. In these cases. engine owners may not be aware that the premature failure of their eng•ne was the result of abuse or neglect. or that the difficulty which they experience is caused by the equipment rather than the engine. ARIGGS STRATTON WARRANTY COVERS DEFECTIVE MATERIAL and/or WORKMANSHIP. LIMITED WARRANTY For ttme penod shown below from date of purchase. Briggs & Stratton Corporation will replace for the original purchasers, free of charge, any part, or parts of the engtne. found upon examination by any Factory Authorized Service Center. or by the Factory at Milwaukee, Wisconsin, to be defective in material or workmanship or both. this is the exclusive remedy, All transporlation charges on parts submitted for replacement under this Warranty must be borne by purchaser. For warranty service. contact your nearest Authorized Service Center as listed in the ‘Yellow Pagest”‘ under ‘Engines, Gasoline’ or *Gasoline Engines’ or similar category THERE IS NO OTHER EXPRESS WARRANTY. IMPLIED WARRANTIES. INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED TO ONE YEAR FROM PURCHASE AND TO THE EXTENT PERMITTED BY LAW AND ALL IMPLIED WARRANTIES ARE EXCLUDED. LIABILITY FOR CONSEQUENTIAL DAMAGES UNDER ANY AND ALL WARRANTIES ARE EXCLUDED TO THE EXTENT EXCLUSION IS PERMITTED BY LAW Some states do not allow limitations on how long an implied warranty lasts, and some states do not allow the exclusion of 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.” Briggs & Stratton Corporation F. p. Stratton. Jr. Chairman and Chief Executive Officer WARRANTY PERIOD ENGINES All 2 thru 18 hp engines installed on equipment other than lawn mowers, edgers. tillers. and all Sno/Gard engines. Att 2 thru 18 hp engines installed on lawn mowers, edgers, tillers, and all SnoGard engines. All Vanguard and I/C engines. CONSUMER USE’ 1 year-engine 2 year-engine••• 5 year-Magnetron@ ignition••• 2 year-engine Lifetime”-Magnetron@ ignition COMMERCIAL USE’ 1 year-engine 1 year-engine 2 year-engine ignition For purposes of this warranty policy, “consumer use” shall mean personal residential household use by the original retail consumer. “Commercial use” shall mean 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 purposes of this warranty policy. • Lifetime limited warranty of the Magnetron’Ä• ignition shall cover parts and labor for the first five (5) years from the date of purchase; thereafter only parts. “Lifetime” shall mean lifetime 01 the engine in the hands of the original purchaser. Applies to equipment retailed in the U.S A. and Canada. In all other countries, the warranty for CONSUMER USE is the same as COMMERCIAL USE. NO REGISTRATION (WARRANTY) CARD IS NECESSARY TO OBTAIN WARRANTY ON BRIGGS & STRATTON ENGINES. SAVE YOUR PURCHASE RECEIPT. PROOF OF PURCHASE DATE WILL BE REQUIRED TO OBTAIN WARRANTY.
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