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Before starting this engine , read and understand Operator / Owner Manual . Failure to follow instructions this in this manual could result in serious injury or death . � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � ModeTlype Code For future reference , write yourengine Model / Type / Code here . For future reference , write yourengine Date of Purchase here . Table of Contents Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . 8 . . In the Interest of Safety . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . Service , Storage & Specifications . . . . . . . . . . . . . . . . . 9 . Oil & Fuel Recommendations . . . . . . . . . . . . . . . . . . . . . 3 . Emission System Warranty . . . . . . . . . . . . . . . . . . . . . . 1.0 Starting & Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 . . About Engine Warranty . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 . Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 . . . Engine Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 . Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 . . . Briggs & Stratton Corporation Milwaukee , Wisconsin 53201 FORM NO . 273694 - 10 / 98 www.briggsandstratton.com PRINTED IN U.S.A .  Copyright 1998 by Briggs & Stratton Corporation
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Maintenance , replacement or repair of the emission control devices and systems may be performed by any nonroad en - gine repair establishment or individual . However , to obtain no charge repairs under the terms and provisions of the Briggs & Stratton warranty statement , any service or emission control part repair or replacement must be performed by a factory authorized dealer . In the Interest of Safety This safety alert symbol indicates that this message You are not ready to operate this engine if you involves personal safety . Words danger , warning have not read and understood the following and caution indicate degree of hazard . Death , safety items . Read this entire owner’s manual and personal injury and / or property damage may occur the operating instructions of the equipment this engine powers . unless instructions are followed carefully . The Briggs & Stratton engine you bought with your equipment is made of the finest material in a state - of - the - art manufacturing facility . Please understand that Briggs & Stratton sells engines to original equipment manufacturers . It also sells to otherns tihe distribution chain who may sell to the ultimate consumer , an equipment manufacturer , another distributor or a dealer . As a rlet , su Briggs & Stratton does not necessarily know the application on which the engine will be placed . For that reason , you should carefully read and understand the operating instructions of the equipment on which your engine is placed before you operate it . You should also understand that there are equipment applications for which Briggs & Stratton does not approve the use of its engines . Briggs & Stratton engines are not to be used on vehicles with less than 4 wheels . They include motor bikes , aircraft products and All Terrain Vehicles . Moreover , Briggs & Stratton does not approve of its engines being used in competitive eve.nts F0R THAT REASON , BRIGGS & STRATTON ENGINES ARE NOT AUTHORIZED FOR ANY OF THESE APPLICATIONS . Fail - ure to follow this warning could result in death , serious injury ( including paralysis ) or property damage . DO NOT check for spark with spark plug removed . ( Use an DO NOT run engine in an enclosed area . ( Exhaust gases contain carbon monoxide , an approved tester . ) odorless and deadly poison . ) DO NOT crank engine with spark plug removed . ( If engine is flooded , place throttle in FAST and crank until engine starts . ) DO NOT remove fuel tank cap nor fill fuel tank while DO NOT strike flywheel with a hammer or hard object as this engine is hot or running . DONOT refuel indoors or in may cause flywheel to shatter in operation . ( To remove flywheel , an unventilated area . ( Allow engine to cool 2 min - use Briggs & Stratton approved tools only . ) utes before refueling . ) DO NOT operate engine without a muffler . ( Inspect periodically DO NOT place hands or feet near moving or rotating parts . and replace if worn or leaking . If engine is equipped with muf - DO NOT store , spill , or use gasoline near an open flame , nor fler deflector , inspect periodically and replace if necessary . Re - near an appliance like a stove , furnace , or water heater that placement parts must be same as on original equipment . ) uses a pilot light or can create a spark . DO NOT operate engine with an accumulation of grass , DO NOT refuel indoors or in an unventilated area . leaves or other combustible material in muffler area . DO NOT operate or tip engine / equipment at such a severe DO NOT use this engine on any forest covered , brush cov - angle that causes gasoline spillage . ered , or grass covered unimproved land unless a spark ar - DO NOT operate engine if gasoline is spilled or when smell of rester is installed on muffler . The spark arrester must be main - gasoline is present or other explosive conditions exist . ( Move tained in working order by the owner and / or operator . In the equipment away from spill and avoid any ignition until gasoline State of California the above is required by law ( Section 4442 has evaporated . ) of the California Public Resources Code ) . Other states may DO NOT transport engine with fuel in tank or fuel shut - off have similar laws . Federal laws apply on federal lands . valve open . DO NOT touch hot muffler , cylinder , or fins which can cause DO NOT choke carburetor to stop engine , especially in an en - burns . closed vehicle . ( Whenever possible , gradually reduce engine DO NOT start engine with air cleaner or air cleaner cover re - speed before stopping . ) moved ( or cover over carburetor air intake , if Sno / Gard engine ) . DO NOT tamper with governor springs , links or other parts to DO NOT attempt to start engine with cutting blade loose or re - increase engine speed . ( Run engine at speed set for equipment moved . ( Blade must be tight , otherwise a kickback may occur . ) manufacturer . ) leaks . Replace if necessary . ✔ PULL starter cord slowly until resistance is felt . Then pull cord rapidly to avoid kickback and prevent hand or arm injury . ✔ Use only Genuine Briggs & Stratton Parts or their equivalent . The use of replacement parts which are ✔ PREVENT ACCIDENTAL STARTING by removing spark not of equivalent quality may damage the engine . plug wire from spark plug when servicing engine or equip - ment . Disconnect negative wire from battery terminal if equipped with electric starting system . � � � � � � � � ✔ REMOVE blower housing periodically and clean engine . The engine exhaust from this product Keep cylinder fins and governor parts free of dirt , grass contains chemicals known to the State and other debris which can affect engine speed . of California to cause cancer , birth ✔ USE fresh gasoline . Stale fuel can gum carburetor and defects , or other reproductive harm . cause leakage . ✔ CHECK fuel lines and fittings frequently for cracks or International Safety Alert - Read Fuel On Off Stop Fuel Choke Owner’s Manual Shutoff Symbols In the USA and Canada , a 24 hour hot line , 1 - 800 - 233 - 3723 , has a menu of pre - recorded messages offering you engine maintenance information . 2
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Oil & Fuel Recommendations Oil Fuel This engine is shipped from Briggs & Stratton withoutoil . Use clean , fresh , regular unleaded gasoline with a minimum , check oil level as shown below . Before starting engine of 85 octane . Do not mix oil with gasoline . Fresh fuel prevents gum from forming in fuel system or on essential carburetor Change and add oil according to chart below . Do not over - fill . parts . Purchase fuel in quantity that can be used within 30 Use a high quality detergent oil classified “ For Service days . In countries other than the U.S.A . , leaded gasoline may SF , SG , SH , � such as Briggs & Stratton “ warranty certified � be used if commercially available and unleaded is unavailable . SAE 30 oil , Part No . 100005 or 100028 . Use no special addi - tives with recommended oils . Do not mix oil with gasoline . We recommend the use of Briggs & Stratton Gasoline Additive . SAE Viscosity Grades ( See your Authorized Briggs & Stratton Service Dealer for Part No . 5041 or the single - use pouch . ) See storage instruc - * * tions , on page 9 . * Note : Some fuels , called oxygenated or reformulated gasolines , are gasolines blended with alcohols or ethers . Excessive amounts of these blends can damage the fuel system or cause performance problems . Do not use gasoline 32 20 40 60 80 100 - 20 0 ° F which contains Methanol . If any undesirable operating ° C - 30 - 20 - 10 0 10 20 30 40 symptoms occur , use gasoline with a lower percentage of STARTING TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE alcohol or ether . * Air cooled engines run hotter than automotive engines . The use of multi - viscosity oil such as ( 10W - 30 , etc . ) in ambient temperatures Do not over - fill fuel tank . Allow space for fuel expansion . above 40 ° F ( 4 ° C ) will result in higher than normal oil consumption . If multi - viscosity oil is used , check the oil level more frequently to prevent any possible engine damage due to lack of lubrication . * * Use of SAE 30 oil below 40 ° F ( 4 ° C ) will result in hard starting and possible engine damage due to inadequate lubrication . 6 5 Check oil level before starting engine . Add oil as shown below . 4 oil Oil capacity is about 1 - 7 / 8 qts ( 60 ozs or 1.8 ltrs ) without filter . oil filter . Oil capacity is about 2 qts ( 64 ozs or 1.9 ltrs ) with Note : Oil capacity will be greater if engine is equipped with 3 oil filter . remote After filling with or changing oil , start and run engine at idle for 30 seconds . Shut engine off . Wait 30 seconds and check oil 1 . Spark plug wire level . Add oil , if required , to bring level toFull mark on dipstick . 2 . Oil drain plug 3 . 12V electric starter 7 4 . Oil fill / Dipstick 5 . Rotating screen 2 1 6 . Air cleaner 7 . Fuel pump 8 13 12 Place engine level . Remove dipstick . Tighten dipstick . Clean around oil fill.Wipe with clean cloth . Remove & check . 11 8 . Blower housing 9 . Oil filter 10 . Valve cover 10 11 . Intake manifold 12 . Carburetor Fill to FULL mark on dipstick . Tighten dipstick be - 9 13 . Engine Model Type Code fore starting engine . Pour oil slowly . xxxxxx xxxx xx xxxxxxxx Recheck oil level and add if required . In the USA and Canada , a 24 hour hot line , 1 - 800 - 233 - 3723 , has a menu of pre - recorded messages offering you engine maintenance information . 3
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Starting & Stopping Choke operation / engine warm - up Start engine This is a low emissions engine which operates differently from Always keep hands and feet clear of mower blade or previously built engines . It is designed for maximum perfor - other rotating machinery . mance and life if operated with the choke fully open ( in RUN ) and throttle fully open ( in FAST ) . To open the choke fully requires an engine warm - up period of several seconds to Electric starter several minutes , depending on the temperature . Turn key to START or press starter button . Repeat if neces - After starting engine , first open the choke ( toward RUN ) until sary with throttle control in FAST position . Operate engine in the engine just begins to run smoothly . Then open the choke in FAST position . small steps , allowing the engine to accept small changes in Note : If equipment manufacturer has supplied battery , charge it speed and load , until the choke is fully open ( in RUN ) . before trying to start engine , as equipment manufacturer recom - During engine warm - up , the equipment can be operated . mends . Use short starting cycles ( 15 secs . per min . ) to prolong starter life . Extended cranking can damage starter motor . To obtain best starting results Store and fuel lawn machine in level position . PRESS Start lawn mower on hard surface or over previously cut grass . BUTTON Do not use a pressurized starting fluid . Starting fluid is flammable . Severe engine damage or fire may occur . A warm engine requires less choking than a cold engine . Typical starter switches Starting in cold weather : Use the correct oil for the starting temperature expected . If engine is equipped with battery for electric starter , do not operate engine with battery disconnected . De - clutch all possible external loads . Set speed control at part throttle position . A warm battery has more starting capacity than a cold battery . Do not use gasoline left over from summer . Use fresh winter grade gasoline which has higher volatility to improve starting . If engine runs low on oil , an oil pressure switch ( if engine is equipped ) will either activate a warning light . ( Read the operat - ing instructions supplied by the equipment manufacturer to determine which way your engine is equipped . ) See oil pressure on page 6 for oil filling instructions . Stop engine Do not move choke control to CHOKE position to stop engine . Before starting engine Backfire or engine damage may occur . Move throttle control Open fuel shut - off valve , if engine is equipped . to SLOW position , then to STOP or turn key to OFF . Always remove key from switch when equipment is not in use or left Move choke control to CHOKE or START position . unattended . Note : Choke must fully close . If engine does not start , see When transporting engine , close fuel shut - off valve ( if control adjustments on page 5 . equipped ) to prevent fuel leakage . Move throttle control to RUN or FAST position . PULL OUT TO CHOKE Typical stop switches Typical throttle and choke controls In the USA and Canada , a 24 hour hot line , 1 - 800 - 233 - 3723 , has a menu of pre - recorded messages offering you engine maintenance information . 4
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Adjustments Control adjustments Carburetor adjustments The manufacturer of the equipment on which this engine is installed specifies top speed at which the engine will be operated . DO NOT EXCEED this speed . WIRE Air cleaner and air cleaner cover must be assembled to To prevent accidental starting when carburetor before starting engine . adjusting controls , remove spark plug wires from spark plugs and disconnect The carburetor on this engine is low emission . It is not adjust - battery at negative terminal . able , except for idle speed . Governed idle speed is 1750 rpm , set at the factory . Adjustments To adjust choke control : If idle speed does require adjusting , start engine and warm up Remove air cleaner . Move choke control to CHOKE or approximately 5 minutes before adjusting . With engine START position . Carburetor choke should be completely running , place throttle control in SLOW position . Rotate closed . If not , loosen casing clamp screw . Then pull casing , carburetor throttle lever against the idle speed screw and hold wire and engine choke lever in direction of arrow to end of it . Turn idle speed screw to obtain 1500 rpm . Release carbu - travel . Tighten casing clamp screw . Replace air cleaner . retor throttle lever . Move throttle control to FAST position . Engine should accelerate smoothly . PULL TO CHOKE IDLE SPEED SCREW WIRE AND CASING CARBURETOR THROTTLE LEVER SCREW Choke control adjustment Carburetor adjustments To adjust throttle control : Note : Engines operated at approximately 3000 to 5000 feet ( 900 to 1500 meters ) or above sea level may require a high Remove air cleaner . Move throttle control to FAST position . altitude carburetor air bleed . If erratic performance is Swivel should be against throttle stop . If not , loosen casing observed , contact a Briggs & Stratton Authorized Service clamp screw . Pull casing and wire in direction shown by arrow Dealer for a high altitude carburetor air bleed . until swivel rotates against throttle stop . Tighten casing clamp screw . THROTTLE STOP CASING CLAMP SWIVEL SCREW Throttle control adjustment In the USA and Canada , a 24 hour hot line , 1 - 800 - 233 - 3723 , has a menu of pre - recorded messages offering you engine maintenance information . 5
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See Maintenance Schedule , page 8 . Follow the hourly or calendar intervals , whichever occur first . Note that more frequent service is required when operating in adverse conditions . Maintenance Air cleaner WIRE To prevent accidental starting when KNOBS servicing engine or equipment , remove spark plug wires from spark plugs and disconnect battery at negative terminal . COVER Oil Check oil level regularly . CARTRIDGE Be sure correct oil level is maintained . Check every 8 hours or PART NO . 499486 daily , before starting engine . See check oil level on page 3 . Change oil ( Follow Maintenance Schedule . ) FOAM PRE – CLEANER PART NO . 273638 Change oil after first 8 hours of operation . Remove drain plug and drain oil while engine is warm . Replace drain plug . Remove dipstick or oil cap andrefill with new oil of recommended grade ( see chart , page 3 ) . Start and run engine at idle for 30seconds . Stop engine . Wait 30 seconds and re - check oil level . Add oil to bring level toFULL mark on dipstick , if required . Note : Change oil after every 50 hours of operation . Change oil Dual element air cleaner every 25 hours if engine is operated under heavy load or in high ambient temperatures . 1 . Remove knobs and cover . Maintenance Schedule . ) Change oil filter ( Follow 2 . Lift out cartridge and foam pre - cleaner . Replace oil filter after every 100 hours of operation . Drain To service pre - cleaner , wash in liquid detergent and water . engine oil and replace with fresh oil . Before installing new Squeeze dry in a clean cloth . Saturate in engine oil . Squeeze filter , lightly oil filter gasket with fresh , clean oil . Screw filter on in clean , absorbent cloth to remove all EXCESS oil . Replace if by hand until gasket contacts oil filter adapter . Tighten 1 / 2 to very dirty or damaged . 3 / 4 turn more . Start and run engine at idle to check for leaks . Stop engine . Re - check oil level . Add oil if required . To service cartridge , clean by tapping gently on a flat surface . Do not oil cartridge . Replace if very dirty or damaged . Note : Do not use petroleum solvents , e.g . , kerosene , which will 3 / 8 � SQUARE rto cause the cartridge to deteriorate . Do not use pressurized ai clean cartridge . Pressurized air can damage the cartridge . 3 . Reinstall pre - cleaner ( mesh side up ) and cartridge . PIPE 4 . Replace cover and knobs . OIL DRAIN OIL FILTER Typical PLUG P / N SEE PAGE 8 drain plugs Oil drain Oil filter Oil Pressure 2 ) , anoil pressure If oil pressure drops below 4 - 6 psi ( . 2 - . 4 kg / cm switch ( if engine is equipped ) will either activate a warning device or stop the engine . Check oil level with dipstick . If oil level is betweenADD andFULL mark on dipstick , Do not try to restart engine . Contact an Authorized Briggs & Stratton Service Dealer . Do not operate engine until oil pressure is corrected . If oil level is belowADD mark on dipstick , add oil to bring level to FULL mark . Restart engine and check oil pressure . If pressure is normal , continue to operate engine . Note : Oil pressure gauge , if engine is equipped , is supplied by manufacturer of equipment . In the USA and Canada , a 24 hour hot line , 1 - 800 - 233 - 3723 , has a menu of pre - recorded messages offering you engine maintenance information . 6
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See Maintenance Schedule , page 8 . Follow the hourly or calendar intervals , whichever occur first . Note that more frequent service is required when operating in adverse conditions . Maintenance Keep engine and parts clean . Grass or chaff may clog the air cooling system , especially after prolonged operation cutting tall , dry grass . Remove rota - With a brush or cloth , remove grass , chaff or debris from rotat - ing screen , air cleaner cover and blower housing . To prevent ing screen daily or more often if needed to prevent engine debris from entering carburetor , it is important to cover the damage caused by overheating . Do not clean with a forceful carburetor air intake located above and behind carburetor spray of water because water could contaminate fuel system . ( inset ) when cleaning cooling system . Clean debris and dirt ROTATING SCREEN from flywheel and cylinder cooling fins and cylinder shields to prevent overheating and engine damage . CLEAN AREAS UNDER BLOWER HOUSING AIR CLEANER OF ALL DEBRIS KNOBS Rotating screen To assure smooth operation , keep governor linkage , springs and controls free of debris . SCREWS CARBURETOR CLEAN AIR INTAKE Linkage , springs & controls Keep muffler area clean and muffler in working order . Air cooling system Daily or more often , before running engine , clean muf - . 030 � ( 0.76 mm ) Replace or clean spark fler area to remove all grass and combustible debris . WIRE GAGE plugs . Do not blast clean . If engine muffler is equipped with spark arrester Clean by scraping or wire screen , remove for cleaning and inspection . Replace if brushing and washing damaged or plugged . with a commercial solvent . FILTER Replace in - line fuel filter . See an Use only Briggs & Strat - Authorized Briggs & Stratton Service RESISTOR ton Spark Tester , Part No . PART NO . 491055 ÌÌÌÌ Dealer for correct replacement . 19368 , to check for spark . Drain fuel tank or close fuel ÌÌÌÌÌ ÌÌÌÌ Spark plug shut - off valve before replacing ÌÌÌ Note : In some areas , local law requires using resistor spark plugs fuel filter . PART NO . 493629 to suppress ignition signals . If this engine was originally equipped Fuel filter with resistor spark plugs , use same type for replacement . See any Authorized Briggs & Stratton 273694 Fill in both sides , clip and return to : Service Dealer . Insist on Genuine Briggs & Stratton Corporation Briggs & Stratton parts ! Non - original P.O . Box 1144 parts may not perform as well and Milwaukee , WI 53201 - 1144 U.S.A . may void your warranty . � � � � To obtain a complete Parts List of Genuine Briggs & Stratton Parts for � � � � � � � your engine , fill in both sides of this order form carefully . We cannot fill � � � � � � � � � � � � � � � � � � your order without the correct Engine Model / Type / Code . ( Please Your Engine allow 3 to 4 weeks for delivery . ) Model Type Code In the USA and Canada , a 24 hour hot line , 1 - 800 - 233 - 3723 , has a menu of pre - recorded messages offering you engine maintenance information . 7
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273694 Maintenance Schedule Follow the hourly or calendar intervals , whichever occur first . More frequent service is required when operating in adverse conditions noted below . Every 8 Hours 25 Hours or 50 Hours or 100 Hours or Maintenance Operation Yearly or Daily Every Season Every Season Every Season Check oil level � � Change oil ♦ Note 1 Change oil filter ♦ � � Service air cleaner pre - cleaner Note 2 � Service air cleaner cartridge Note 2 Inspect spark arrester , � if equipped � Clean cooling system Note 2 Replace spark plugs � Replace in - line fuel filter � Check valve clearance � ♦ Change oil after first 8 hours , then after every 50 hours or every season . Note 1 : Change oil every 25 hours when operating under heavy load or in high temperatures . Clean more often under dusty conditions or when airborne debris is present . Note 2 : Replace air cleaner parts , if very dirty . Briggs & Stratton Part Numbers of some Briggs & Stratton Part Numbers of some Genuine Briggs & Stratton Parts : Genuine Briggs & Stratton Parts : Briggs & Stratton Part No . Part Briggs & Stratton Part No . Part Air cleaner cartridge . . . . . . . . . . . . . . . . . . . . . . . . . 4.99486 Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . 0 . 0 . 005 or 100028 Air cleaner pre - cleaner . . . . . . . . . . . . . . . . . . . . . . . 2.73638 Oil filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.9.2932 or 5049 Resistor spark plug ( Champion RC12YC ) . . . . . . . 491055 Fuel filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.9.3629 Spark plug elbow . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 . 0 . 5529 Gas additive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0.4.1 Spark plug wrench . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.9.374 Spark tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.9.3.68 Genuine Briggs Only Fill in both sides of this order form carefully Payment Method : & Stratton Parts have the Briggs & � Check or money order enclosed payable to Stratton logo ! Briggs & Stratton Corporation in the amount of $ ________ ( U.S . Dollars , please ) � Please charge my � MasterCard � VISA __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ CREDIT CARD NUMBER SIGNATURE ( REQUIRED FOR CREDIT CARD ORDERS EXPIRATION DATE Parts List $ 2.00 Shipping & Handling $ 1.50 Add sales tax if you live in any of the following states : * * Add State Sales Tax Look for Briggs & Stratton logo � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Total � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � stamped on part and / or package ! In the USA and Canada , a 24 hour hot line , 1 - 800 - 233 - 3723 , has a menu of pre - recorded messages offering you engine maintenance information . 8
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Service , Storage & Specifications For service Storage instructions See an Authorized Briggs & Stratton Service Dealer . Each Engines stored over 30 days need to be protected or drained one carries a stock of Genuine Briggs & Stratton Parts and is of fuel to prevent gum from forming in fuel system or on equipped with special service tools . Trained mechanics essential carburetor parts . assure expert repair service on all Briggs & Stratton engines . Only dealers advertising as “ Authorized Briggs & Stratton � 1 . For engine protection , we recommend use of are required to meet Briggs & Stratton standards . Briggs & Stratton Gasoline Additive , Part No . When you purchase equipment powered by a 5041 , available from an Authorized Briggs & Briggs & Stratton engine , you are assured of Stratton Service Dealer . Mix Additive with highly skilled , reliable service at more than fuel in fuel tank or storage container . Run 30,000 Authorized Service Dealers worldwide , engine for a short time to circulate Additive including more than 2,700 Master Service through carburetor . Engine and fuel can be Technicians . Look for these signs wherever P / N 5041 stored up to 24 months . Briggs & Stratton service is offered . Your Service Dealer has single - use You may locate your nearest Authorized Briggs & pouches of Gasoline Additive available . Stratton Service Dealer in the “ Yellow Pages  � directory under “ Engines , Gasoline � or “ Gasoline  Engines , � or “ Lawn Mowers � or similar category . Note : If engine is operating on oxygenated or reformulated Or log on to our dealer locator map on our web site gasoline ( gasoline blended with an alcohol or an ether ) , www.briggsandstratton.com remove all fuel from tank and run engine until it stops from Note : Walking fingers logo and “ Yellow Pages � are registered lack of fuel . If engine is stored with gasoline in fuel tank , we trademarks in various jurisdictions . recommend the use of Gasoline additive , Part No . 5041 . The illustrated shop manual shown here 2 . While engine is still warm , drain oil from crankcase includes “ Theories of Operation , � com - ( see page 6 ) . Refill with fresh oil of recommended grade mon specifications and detailed informa - ( see chart page 3 ) . tion covering adjustment , tune - up and repair of Briggs & Stratton V - Twin cylinder 3 . Remove spark plugs and pour about 1 oz ( 30 ml ) of OHV , 4 cycle engines . It is available from engine oil into cylinders . Replace spark plugs and crank an Authorized Briggs & Stratton Service slowly to distribute oil . Dealer or you can order it from the factory . 4 . Clean dirt and chaff from cylinders , cylinder head fins , blower Write : housing , rotating screen and muffler area ( see page 7 ) . Briggs & Stratton Corporation Part No . 273521 Attn : Service Division 5 . Store in a clean and dry area , but NOT near a stove , P . O . Box 1144 furnace or water heater which uses a pilot light or any Milwaukee , WI 53201 device that can create a spark . General information Note : For practical operation , the horsepower loading should not exceed 85 % of rated horsepower . Engine power will This is a twin cylinder , overhead valve , air cooled engine . SAE decrease 3 - 1 / 2 % for each 1,000 feet ( 300 meters ) above sea standards apply to all drilled / tapped holes and fasteners on this level and 1 % for each 10 ° F ( 5.6 ° C ) above 77 ° F ( 25 ° C ) . engine except the rocker arm screws which are ISO metric . On mobile equipment , this engine will operate satisfactorily at Tune - up specifications any angle at which operator and equipment can function safely . Armature air gap is . 008 - . 012 in . ( . 20 - . 30 mm ) Model Series 405700 , 406700 , 407700 Spark plug gap is . 030 in . ( . 76 mm ) Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . 9.7 in . ( 75.44 mm ) Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . 8 . 9 in . ( 73.4 mm ) Valve clearance is : Displacement . . . . . . . . . . . . . . . . . . . . 4 . 0 . . 0 cu . in . ( 656 cc ) Intake * . . . . . . . . . . . . . . . . . . . . . . 0.04 - . 006 in . ( . 10 - . 15 mm ) Torque ( Max . ) . . . . . . . . . . . . . . . . . 3.3.0 ft . lbs . @ 2400 rpm Exhaust * . . . . . . . . . . . . . . . . . . . . 0 . 04 - . 006 in . ( . 10 - . 15 mm ) * Check when engine is cold . Model Series 445700 Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 . . 1.2 in . ( 79.25 mm ) Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . 8 . 9 in . ( 73.4 mm ) Displacement . . . . . . . . . . . . . . . . . . . . 4 . 4 . . 2 cu . in . ( 725 cc ) Torque ( Max . ) . . . . . . . . . . . . . . . . . 3.6.0 ft . lbs . @ 2400 rpm and the United States Environmental Protection Agency ( U.S . EPA ) Emission Control System Warranty Statement ( Owner’s Defect Warranty Rights and Obligations ) In the USA and Canada , a 24 hour hot line , 1 - 800 - 233 - 3723 , has a menu of pre - recorded messages offering you engine maintenance information . 9
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273694 Briggs & Stratton Corporation ( B & S ) , the California Air Resources Board ( CARB ) TO CERTIFIED ENGINES PURCHASED IN CALIFORNIA IN 1995 In the interest of the environment , B & S engines that meet strict emis - AND THEREAFTER , WHICH ARE USED IN CALIFORNIA , AND sion requirements are labeled , “ This engine conforms to 1995 - 1998 TO CERTIFIED MODEL YEAR 1997 AND LATER ENGINES California emission regulations for ULGE engines and U.S . EPA WHICH ARE PURCHASED AND USED ELSEWHERE IN THE Phase I regulations for small non - road engines . � UNITED STATES . EMISSION CONTROL WARRANTY COVERAGE IS APPLICABLE California and United States Emission Control Defects Warranty Statement CARB , U.S . EPA and B & S are pleased to explain the Emission Con - there has been no abuse , neglect or improper maintenance of your trol System Warranty on your 1996 and later utility or lawn and gar - ULGE engine . den equipment ( ULGE ) engine . In California , new ULGE engines Your emission control system includes parts such as the carburetor , produced on or after August 1 , 1995 must be designed , built and air cleaner , ignition system , muffler and catalytic converter . Also in - equipped to meet the State’s stringent anti - smog standards . Else - cluded may be connectors and other emission related assemblies . where in the United States , new non - road , spark - ignition engines Where a warrantable condition exists , B & S will repair your ULGE en - certified for model year 1997 and later , must meet similar standards gine at no cost to you including diagnosis , parts and labor . set forth by the U.S . EPA . B & S must warrant the emission control system on your engine for the periods of time listed below , provided Briggs & Stratton Emission Control Defects Warranty Coverage ULGE engines are warranted relative to emission control parts de - any covered part on your engine is defective , the part will be repaired fects for a period of two years , subject to provisions set forth below . If or replaced by B & S . Owner’s Warranty Responsibilities As the ULGE engine owner , you are responsible for the performance You are responsible for presenting your ULGE engine to an Autho - rized B & S Service Dealer as soon as a problem exists . The undis - of the required maintenance listed in your Operator / Owner Manual . puted warranty repairs should be completed in a reasonable amount B & S recommends that you retain all your receipts covering mainte - of time , not to exceed 30 days . nance on your ULGE engine , but B & S cannot deny warranty solely for the lack of receipts or for your failure to ensure the performance of If you have any questions regarding your warranty rights and re - all scheduled maintenance . sponsibilities , you should contact a B & S Service Representative at 1 - 414 - 259 - 5262 . As the ULGE engine owner , you should however be aware that B & S may deny you warranty coverage if your ULGE engine or a part has The emission warranty is a defects warranty . Defects are judged on failed due to abuse , neglect , improper maintenance or unapproved normal engine performance . The warranty is not related to an in - use modifications . emission test . Briggs & Stratton Emission Control Defects Warranty Provisions The following are specific provisions relative to your Emission Control Defects Warranty Coverage . It is in addition to the B & eSngine warranty for non - regulated engines found in the Operator / Owner Manual . 3 . No Charge 1 . Warranted Parts Repair or replacement of any Warranted Part will be performed Coverage under this warranty extends only to the parts listed be - at no charge to the owner , including diagnostic labor which leads low ( the emission control systems parts ) to the extent these to the determination that a Warranted Part is defective , if the parts were present on the engine purchased . diagnostic work is performed at an Authorized B & S Service a . Fuel Metering System Dealer . For emissions warranty service contact your nearest Au - • Cold start enrichment system ( soft choke ) thorized B & S Service Dealer as listed in the “ Yellow Pages � un - der “ Engines , Gasoline , � “ Gasoline Engines , � “ Lawn Mowers , � • Carburetor and internal parts or similar category . • Fuel Pump 4 . Claims and Coverage Exclusions b . Air Induction System Warranty claims shall be filed in accordance with the provisions • Air cleaner of the B & S Engine Warranty Policy . Warranty coverage shall be • Intake manifold excluded for failures of Warranted Parts which are not original B & S parts or because of abuse , neglect or improper mainte - c . Ignition System nance as set forth in the B & S Engine Warranty Policy . B & S is not • Spark plug ( s ) liable to cover failures of Warranted Parts caused by the use of • Magneto ignition system add - on , non - original , or modified parts . 5 . Maintenance d . Catalyst System Any Warranted Part which is not scheduled for replacement as • Catalytic converter required maintenance or which is scheduled only for regular in - • Exhaust manifold spection to the effect of “ repair or replace as necessary � shall be • Air injection system or pulse valve warranted as to defects for the warranty period . Any Warranted Part which is scheduled for replacement as required mainte - e . Miscellaneous Items Used in Above Systems nance shall be warranted as to defects only for the period of time • Vacuum , temperature , position , time sensitive valves up to the first scheduled replacement for that part . Any replace - and switches ment part that is equivalent in performance and durability may • Connectors and assemblies be used in the performance of any maintenance or repairs . The owner is responsible for the performance of all required mainte - 2 . Length of Coverage nance , as defined in the B & S Operator / Owner Manual . B & S warrants to the initial owner and each subsequent purchaser 6 . Consequential Coverage that the Warranted Parts shall be free from defects in materials and workmanship which caused the failure of the Warranted Coverage hereunder shall extend to the failure of any engine Parts for a period of two years from the date the engine is deliv - components caused by the failure of any Warranted Part still un - ered to a retail purchaser . der warranty . In the USA and Canada , a 24 hour hot line , 1 - 800 - 233 - 3723 , has a menu of pre - recorded messages offering you engine maintenance information . 10
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About your engine warranty : ( see back cover for statement of LIMITED WARRANTY ) . 4 . Parts which are scored or broken because an engine was Briggs & Stratton welcomes warranty repair and apologizes operated with insufficient or contaminated lubricating oil , to you for being inconvenienced . Any Authorized Service or an incorrect grade of lubricating oil ( check oil level daily Dealer may perform warranty repairs . Most warranty repairs or after every 8 hours of operation . Refill when necessary are handled routinely , but sometimes requests for warranty and change at recommended intervals . ) Read “ Owner’s service may not be appropriate . For example , warranty would Manual . � not apply if engine damage occurred because of misuse , lack of routine maintenance , shipping , handling , warehousing or 5 . Repair or adjustment of associated parts or assemblies improper installation . Similarly , warranty is void if the serial such as clutches , transmissions , remote controls , etc . , number of the engine has been removed or the engine has which are not manufactured by Briggs & Stratton . been altered or modified . 6 . Damage or wear to parts caused by dirt , which entered the engine because of improper air cleaner maintenance , If a customer differs with the decision of the Service Dealer , an re - assembly , or use of a non - original air cleaner element investigation will be made to determine whether the warranty or cartridge . ( At recommended intervals , clean and re - oil applies . Ask the Service Dealer to submit all supporting facts to element or the foam pre - cleaner , and re - the Oil - Foam  his Distributor or the Factory for review . If the Distributor or the place the cartridge . ) Read “ Owner’s Manual . � Factory decides that the claim is justified , the customer will be 7 . Parts damaged by overspeeding , or overheating caused fully reimbursed for those items that are defective . To avoid by grass , debris , or dirt , which plugs or clogs the cooling misunderstanding which might occur between the customer fins , or flywheel area , or damage caused by operating the and the Dealer , listed below are some of the causes of engine engine in a confined area without sufficient ventilation . failure that the warranty does not cover . ( Clean fins on the cylinder , cylinder head and flywheel at recommended intervals . ) Read “ Owner’s Manual . � Improper maintenance : 8 . Engine or equipment parts broken by excessive vibration caused by a loose engine mounting , loose cutter blades , The life of an engine depends upon the conditions under unbalanced blades or loose or unbalanced impellers , im - which it operates , and the care it receives . Some applications , proper attachment of equipment to engine crankshaft , such as tillers , pumps and rotary mowers , are very often used overspeeding or other abuse in operation . in dusty or dirty conditions , which can cause what appears to 9 . A bent or broken crankshaft , caused by striking a solid ob - be premature wear . Such wear , when caused by dirt , dust , ject with the cutter blade of a rotary lawn mower , or exces - spark plug cleaning grit , or other abrasive material that has sive v - belt tightness . entered the engine because of improper maintenance , is not 10 . Routine tune - up or adjustment of the engine . covered by warranty . 11 . Engine or engine component failure , i.e . , combustion chamber , valves , valve seats , valve guides , or burned This warranty covers engine related defective material starter motor windings , caused by the use of alternate and / or workmanship only , and not replacement or refund fuels such as , liquified petroleum , natural gas , altered of the equipment to which the engine may be mounted . gasolines , etc . Nor does the warranty extend to repairs required be - cause of : 1 . PROBLEMS CAUSED BY PARTS THAT ARE NOT ORIGINAL BRIGGS & STRATTON PARTS . 2 . Equipment controls or installations that prevent starting , cause unsatisfactory engine performance , or shorten en - Warranty is available only through service dealers which gine life . ( Contact equipment manufacturer . ) have been authorized by Briggs & Stratton Corporation . 3 . Leaking carburetors , clogged fuel pipes , sticking valves , Your nearest Authorized Service Dealer is listed in the or other damage , caused by using contaminated or stale “ Yellow Pages  � of your telephone directory under “ En - fuel . ( Use clean , fresh , lead - free gasoline and Briggs & gines , Gasoline � or “ Gasoline Engines , � “ Lawn Mow - Stratton gasoline stabilizer , Part No . 5041 . ) ers , � or similar category . Briggs & Stratton Engines Are Made Under One Or More Of The Following Patents : Design D - 247,177 ( Other Patents Pending ) 5,642,701 5,320,795 5,197,425 5,105,331 5,009,208 4,875,448 4,522,080 DES . 309,458 5,606,948 5,271,363 5,197,422 5,086,890 4,996,956 4,819,593 4,520,288 DES . 309,457 5,548,955 5,269,713 5,191,864 5,070,829 4,995,357 4,719,682 4,453,507 DES . 308,872 5,546,901 5,265,700 5,188,069 5,058,544 4,977,879 4,694,792 4,430,984 DES . 308,871 5,503,125 5,243,878 5,186,142 5,040,644 4,971,219 4,633,556 4,355,253 5,497,679 5,235,943 5,138,996 5,040,503 4,895,119 4,630,498 4,270,509 In the USA and Canada , a 24 hour hot line , 1 - 800 - 233 - 3723 , has a menu of pre - recorded messages offering you engine maintenance information . 11
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BRIGGS & STRATTON ENGINE OWNER WARRANTY POLICY effective July 1 , 1998 Replaces all undated Warranties and all Warranties dated before July 1 , 1998 LIMITED WARRANTY “ Briggs & Stratton Corporation will repair or replace , free of charge , any part , or parts of the engine that are 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 the time periods and subject to the conditions provided for in this policy . For warranty service contact your nearest Authorized Service Dealer as listed in the ‘ Yellow Pa  ge ’ sunder ‘ Engines , Gasoline , ’ ‘ Gasoline Engines , ’ ‘ Lawn Mowers ’ or similar category . THERE IS NO OTHER EXPRESS WARRANTY . IM - PLIED WARRANTIES , INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED TO ONE YEAR FROM PURCHASE , OR TO THE EXTENT PERMITTED BY LAW ANY 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 or limitation of incidental or consequential dam - ages , 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 WITHIN U.S.A . AND CANADA OUTSIDE U.S.A . AND CANADA CONSUMER COMMERCIAL CONSUMER COMMERCIAL ENGINES USE * USE * USE * USE * All Vanguard  engines . 2 year – engine � / Lifetime * * – Magnetron  ignition All Diamond Plus  , Industrial Plus  , I / C  2 year 1 year 1 year 2 year � engines and sleeve bore Intek series . Quantum  and Diamond Power  . 2 year 90 days 90 days � 2 year � � All standard engines and Kool Bore  Intek series installed on lawn mowers , riders , edgers , 2 year 90 days 1 year 90 days chippers , shredders , tillers , fun carts , and all Sno / Gard engines . All other standard engines and Classic  series . 1 year 90 days 1 year 90 days * For purposes of this warranty policy , “ consumer use � means personal residential household use by the original 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 purposes of this warranty . Engines used in competitive racing or on commercial or rental tracks are not warrantied . * * Lifetime limited warranty of the Magnetron  ignition covers parts and labor for the first five ( 5 ) years from the date of purchase ; thereafter only parts . “ Lifetime � means lifetime of the engine in the hands of the original purchaser . � One ( 1 ) year in Australia , New Zealand , Middle East and Africa . � One ( 1 ) year in India . NO WARRANTY REGISTRATION CARD IS NECESSARY TO OBTAIN WARRANTY ON BRIGGS & STRATTON ENGINES . YOU MUST SAVE THE PURCHASE RECEIPT . A PROOF OF PURCHASE DATE WILL BE REQUIRED TO OBTAIN WARRANTY . In the USA and Canada , a 24 hour hot line , 1 - 800 - 233 - 3723 , has a menu of pre - recorded messages offering you engine maintenance information . 12