Briggs & Stratton 610000 Spezifikationen

TABLE OF CONTENTSSAFETY, MAINTENANCE AND ADJUSTMENTS Section 1. . . . . . . . . . . . . . . . . . TROUBLESHOOTING Section 2. . . . . . . . . . . . . .

1LOCKED FOR PRINTING – SELECT SECT. NEEDED >9AIR CLEANER SERVICEAVOID FIRES!WARNING• Never operate an engine with the air cleanerassembly or air cl

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >99Fig. 9429303132Mikuni CarburetorModels 290400, 303400, 350400 (Before950801xx)Carburetor Identificati

4100Fig. 983. Remove float (5) and fuel inlet needle (6),Fig. 99.NOTE: Float hinge pin (7) is swaged on one end.Drive hinge pin out from side oppo

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >101Fig. 1032324252627282925Remove Fuel Inlet Body and SeatThe fuel inlet body must be removed before th

4102Inspect CarburetorInspect all parts for wear, cracks, nicks and burrs.Inspect float for leaks. Replace damaged parts.Assemble CarburetorWhen assem

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >103Fig. 110192018. Assemble inlet needle retainer (21) to inletneedle (22). Assemble to float (23), Fig

4104Nikki CarburetorModel 540000General InformationThe Vanguardt Model 540000 OHV V-Twin utilizes a fixed jet, two barrel, side draft, flo-jet carbure

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >105Remove Carburetor from ManifoldRemove carburetor gaskets (2) and spacer (1),Fig. 114. Discard carbur

4106Fig. 1187. Remove cover plate (10). Discard gasket (11),Fig. 119.Fig. 119118. Remove screws and choke plate (12), Fig. 120.9. Remove choke s

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >107NOTE: Parts containing rubber, such as seals,O-rings, inlet needles, seats or pumpdiaphragms should

4108Fig. 1266. Install emulsion tube body (8) with new gasket(19), Fig. 127. Tighten screw securely.Fig. 127197. Assemble inlet needle (10) to floa

110CAUTION: DO NOT use petroleum solvents toclean paper cartridge. DO NOT oil paper cartridge. DO NOT use pressurized air to clean or dry papercartrid

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >109Aisan CarburetorModel 610000General InformationThe Vanguardt Model 610000 OHV V-Twin utilizes a fixe

4110Disassemble Carburetor1. Remove four screws (1) and float bowl (2),Fig. 130. Discard gasket.2. Use 13 mm thin profile wrench to remove fuelsolenoi

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >111CAUTION• Wear eye protection when using com-pressed air.AVOID EYE INJURY!4. Use only compressed air

4112For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983www.mymowerparts.com

5LOCKED FOR PRINTING – SELECT SECT. NEEDED >113Section 5GovernorPageGENERAL INFORMATION 114. . . . . . . . . . . . . . . . . . . . . . . . . . . .

5114GENERAL INFORMATIONNOTE: See Section 2 for Performance Controltelectronic governor service information.Vanguard OHV V-Twin engines may be equippe

5LOCKED FOR PRINTING – SELECT SECT. NEEDED >1153. Loosen governor lever nut (3).4. Remove governor lever (2) from shaft.Fig. 55. Remove rust, n

5116Fig. 9Install Governor Shaft1. Assemble lower bushing to governor shaft withthrust flange (4) down, Fig. 10.2. Slide shaft up through lower bea

5LOCKED FOR PRINTING – SELECT SECT. NEEDED >117Fig. 139. Perform governor adjustments, see Trouble-shooting, Section 2.Static adjustment of the

5118Fig. 172. If necessary remove the crank from the cylinderblock. Mark the governor lever and the governorcrank to aid in reassembly. Remove t

1LOCKED FOR PRINTING – SELECT SECT. NEEDED >11Fig. 5ARMATURE AIR GAP ADJUSTMENT1. Loosen screws holding armature in place. Slidearmature away fro

6LOCKED FOR PRINTING – SELECT SECT. NEEDED >119Section 6Cylinder Heads and ValvesPageCYLINDER HEAD SERVICE 120. . . . . . . . . . . . . . . . . . .

6120PARTS IDENTIFICATIONCompression testing information and procedure isdescribed in Section 2 – TROUBLESHOOTING.Fig. 1 shows the components of a typ

6LOCKED FOR PRINTING – SELECT SECT. NEEDED >121Fig. 53. Remove head bolts (5, 6, 7, 8) and cylinderhead, Fig. 6. Discard cylinder head gasket.N

6122• CAUTION: Do not resurface cylinder headmounting surfaces.2. Check valve guide bushings for wear using PlugGauge (2) #19382, Fig. 10. Replace val

6LOCKED FOR PRINTING – SELECT SECT. NEEDED >1231. Measure valve stem diameter approximately1-1/2” (38 mm) from end of valve, Fig. 15.Replace valve

6124Install Cylinder Heads1. Install cylinder head with NEW gasket, Fig. 20.Fig. 20NOTE: Engines manufactured BEFORE 940501xxwere equipped with se

7125Section 7StartersPageGENERAL INFORMATION 126. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7126GENERAL INFORMATIONThe starter motor uses a gear engagement method,similar to an automotive starter. When the startermotor is activated, the pinio

7127C-Ring StyleDisassembleCAUTIONPREVENT EYE INJURY!• Wear eye protection when removingC-ring.1. Place the counterbored side of C-ring Remover#19436

7128Assemble1. Assemble clutch drive (5) to starter shaft. Rotateclutch until it drops into place, Fig. 11.2. Install pinion gear (4) with beveled sid

112Fig. 8Final AdjustmentAll carburetor adjustments performed with the en-gine running must be made with the air cleanerinstalled.• Tools Requir

7129Fig. 13111213141. Remove pinion gear assembly.2. Remove thru bolts (2) and drive end cap (4).Fig. 141112133. Hold the armature

7130Fig. 17ABReplace BrushesThree different brush end caps are used. Refer toFig. 18 for radial flat coil spring end caps.Fig. 18Refer to Fig.

7131Brush retainers can be made from Part #26634control wire or similar material. The retainer is Ushaped, with two legs 1/2” (13 mm) high (2), 3/4”(1

71321. Push down on armature and brush end cap.2. Slide starter housing (1) over armature (2),aligning notch with insulated terminal.NOTE: Use care to

7133Pinion GearPinion gear replacement requires complete startermotor disassembly. A thorough inspection of allcomponents should be performed at that

7134Clean and inspect helix. If helix is damaged, replacestarter. Inspect bearing journals on armature shaftfor wear or damage. If bearing journals ar

7135Fig. 40Assemble Pinion Gear1. Lubricate helix with a light coat of grease.Assemble pinion gear and clutch.2. Assemble new retainer to shaft.3. Ins

7136Fig. 444. Insert brushes into brush holder, Fig. 45.5. Compress springs with needle nose pliers andinsert spring behind brushes.Fig. 456. Inst

7137REWIND STARTER IDENTIFICATIONTwo rewind starters are used on V-Twin engines. The rewind starter components (including the starter and cup)are NOT

7138Replace RopeRemove Rope1. Pull rope out partially. Tie a temporary knot (4),Fig. 51.2. Remove insert (1) from rope handle (2). Pullknot out of rop

1LOCKED FOR PRINTING – SELECT SECT. NEEDED >13Fig. 1210. If the carburetor is equipped with an idle mixturelimiter cap install it at this time.a.

7139Fig. 55Replace Pulley and SpringCurrent StyleCAUTIONPREVENT EYE INJURY!• Wear eye protection when working onstarter pulley and spring.• Pulle

7140Assemble Pulley To Housing1. Lay starter housing on work bench.2. Assemble starter pulley (1) and spring assemblyto center pivot post (2) in housi

7141Fig. 643. Lift out dogs (6) and dog springs (7).4. Rotate pulley (8) until it disengages spring.5. Carefully lift out pulley, Fig. 65.Fig. 65

71422. Note location of spring tab (5) and location ofspring anchor (4) on center post of starterhousing.3. Lower starter housing onto pulley and spri

8LOCKED FOR PRINTING – SELECT SECT. NEEDED >143Section 8Lubrication SystemsPageCRANKCASE BREATHER IDENTIFICATION 144. . . . . . . . . . . . . . . .

8144GENERAL INFORMATIONBriggs & Stratton Vanguardt OHV V-Twins use afull pressure lubrication system with an oil filter. Thegear driven oil pump (

8LOCKED FOR PRINTING – SELECT SECT. NEEDED >145CRANKCASE BREATHER SERVICEModels 290000 – 351000Remove the air cleaner assembly.Remove breather asse

8146Model 380000Remove two screws. Separate breather assemblyfrom valve cover, Fig. 10.Fig. 10Checking Breather1. Remove two screws, reed stop and ree

8LOCKED FOR PRINTING – SELECT SECT. NEEDED >147Models 540000, 6100001. Remove two screws (6) and breather cover (5),Fig. 15.2. Lift off the outer b

8148Models 540000, 610000For proper sealing on these models, the oil fill cap (5)has an O-ring, the dipstick has a grommet (6), Fig. 18.NOTE: The oil

114NOTE: Idle speed may vary according to OEMspecifications.Fig. 168. Deactivate idle-down device, or remove jumperwire. Engine should accelerate s

9LOCKED FOR PRINTING – SELECT SECT. NEEDED >149Section 9Cylinders and Crankcase Covers/SumpsPageCYLINDERS 150. . . . . . . . . . . . . . . . . . .

9150CYLINDERSInspect and Measure1. Check cylinder for cracks, stripped threads orbroken fins. Check cylinder bores for damage orscoring.2. Check cylin

9LOCKED FOR PRINTING – SELECT SECT. NEEDED >151NOTE: Recondition the cylinder bores to restore thecrosshatch finish whenever new pistonrings are in

9152ENGINE BEARINGSMag Bearing – After 970430xxCheck1. Check magneto bearing for damage. Check forwear at several locations using plug gauge#19219 (1)

9LOCKED FOR PRINTING – SELECT SECT. NEEDED >153Insert Bushing Driver #19349 into bearing from oilseal side. Place a reference mark on driver toindi

9154The following tools are recommended to replace theball bearing, Fig. 15.(1) Washer #224061(2) Puller Screw #19318(3) Pilot #19396(4) Driver #19401

10155Section 10Crankshafts and CamshaftsPageINSPECT CAMSHAFT 156. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10156INSPECT CRANKSHAFTInspect crankshaft threads (1) and keyways (2, 8),Fig. 1. Replace crankshaft if threads or keyways aredamaged or worn. Check ma

10157INSPECT CAMSHAFTInspect gear teeth (4), lobes (9, 10), compressionrelease balls (7) and camshaft bearing journals (6,11) for wear and nicks, Fig.

10158For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983www.mymowerparts.com

1LOCKED FOR PRINTING – SELECT SECT. NEEDED >154. While holding throttle lever, SLOWLY turn idlemixture screw for #1 cylinder CLOCKWISE untilengine

11LOCKED FOR PRINTING – SELECT SECT. NEEDED >159Section 11Pistons, Rings and Connecting RodsPageASSEMBLE PISTON AND CONNECTING ROD 161. . . . . . .

11160GENERAL INFORMATIONInstall new piston rings whenever the engine isdisassembled for major servicing or overhaul,providing that cylinder bores are

11LOCKED FOR PRINTING – SELECT SECT. NEEDED >161Models 540000, 610000• Top Compression Ring – 0.030” (0.76 mm)• Center Compression Ring – 0.030” (0

11162Fig. 8#13. Lubricate parts with engine oil. Assemble #2piston and connecting rod, Fig. 9.• Arrow, notch or casting mark on piston mustface flywhe

12LOCKED FOR PRINTING – SELECT SECT. NEEDED >163Section 12Engine AssemblyPageENGINE ASSEMBLY 164. . . . . . . . . . . . . . . . . . . . . . . . . .

12164ENGINE ASSEMBLYInstall CrankshaftLubricate mag bearing and lips of oil seal with engineoil. Install crankshaft, Fig. 1.Fig. 1Install Piston and C

12LOCKED FOR PRINTING – SELECT SECT. NEEDED >1653. Align timing marks on camshaft and crankshafttiming gear. Install camshaft, Fig. 5.4. Assemble g

12166Crankshaft end play is adjusted by adding orremoving a thrust washer. Thrust Washer Kit#807625 contains shims with the following thickness;0.039”

12LOCKED FOR PRINTING – SELECT SECT. NEEDED >167Fig. 132. Install valve covers with new gaskets and valvecover seals (6), Fig. 14. Torque nuts (

12168Models 350000, 3800001. Install washer and flywheel nut.2. Assemble Flywheel Holder #19321 (2) toretainer, Fig. 17.3. Use a torque wrench (1) and

116Fig. 2311Choke Control Adjustment NOTE: Be sure choke control wire is installed in #2hole (2) in choke lever, Fig. 24.Fig. 241. Place choke

12LOCKED FOR PRINTING – SELECT SECT. NEEDED >169Install Armatures1. Assemble armature to engine, Fig. 20.2. Install ground wire onto tab terminal o

121702. Assemble carburetor onto mounting studs,Fig. 24.Fig. 24All Models1. Connect governor link (3) to throttle lever (1).Snap retainer (2) over l

12LOCKED FOR PRINTING – SELECT SECT. NEEDED >171Fig. 29a. Be sure locating pin (2) in spacer fits inrecess (4) in manifold.b. Torque screws to

121723. Assemble choke link (6) to choke lever, Fig. 33.Fig. 334. Assemble carburetor (3), gasket (7), spacer (8)and gasket (9) to intake manifo

12LOCKED FOR PRINTING – SELECT SECT. NEEDED >1734. Install breather deflector (4) and three screws(3). Torque nuts and screws to 65 in. lbs.(7 Nm).

12174Fig. 413. Install breather deflector (2) and two screws (3).Do not tighten at this time.4. Install two air cleaner support screws (4). Torque

12LOCKED FOR PRINTING – SELECT SECT. NEEDED >175Final Engine Assembly• Install muffler and exhaust manifold. Torque to150 in. lbs. (17 Nm).NOTE: Mo

12176For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983www.mymowerparts.com

13177Section 13Engine SpecificationsPageENGINE SPECIFICATIONS 178. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13178Models 290000, 300000Common SpecificationsNOTE: All dimensions in Inches (Millimeters)Armature Air Gap 0.008 – 0.012 (0.20 – 0.30). . . . . . . .

1LOCKED FOR PRINTING – SELECT SECT. NEEDED >17Models 540000, 6100001. Use a coin or screwdriver to twist the Easy CleanAccess panel fasteners (1),

13LOCKED FOR PRINTING – SELECT SECT. NEEDED >179Torque ValuesDescription TorqueAir Cleaner Mounting 90 in. lbs. (10 Nm). . . . . . . . . . . . . .

13180Model 350000Common SpecificationsNOTE: All dimensions in Inches (Millimeters)Armature Air Gap 0.008 – 0.012 (0.20 – 0.30). . . . . . . . . . . .

13LOCKED FOR PRINTING – SELECT SECT. NEEDED >181Torque ValuesDescription TorqueAir Cleaner Mounting 90 in. lbs. (10 Nm). . . . . . . . . . . . . .

13182Model 380000Common SpecificationsNOTE: All dimensions in Inches (Millimeters)Armature Air Gap 0.008 – 0.012 (0.20 – 0.30). . . . . . . . . . . .

13LOCKED FOR PRINTING – SELECT SECT. NEEDED >183Torque ValuesDescription TorqueAir Cleaner Mounting 90 in. lbs. (10 Nm). . . . . . . . . . . . . .

13184Models 540000, 610000Common SpecificationsNOTE: All dimensions in Inches (Millimeters)Armature Air Gap 0.005 – 0.007 (0.13 – 0.18). . . . . . . .

13LOCKED FOR PRINTING – SELECT SECT. NEEDED >185Torque ValuesDescription TorqueAir Cleaner Mounting 190 in. lbs. (21 Nm). . . . . . . . . . . . . .

13186Vanguardt Engines – Honing Fixture 1-7/8”6-11/32”Cylinder Mounting Hardware Fasteners Required:4 @ Crankcase Cover Screws, 4 @ Flat Washers 3/8”

13LOCKED FOR PRINTING – SELECT SECT. NEEDED >187Starter Motor Support BlockA starter motor support block can be made fromstock 1” (25.4 mm) thick a

13188FUEL SYSTEM IDENTIFICATIONModel Fuel SystemTypeColorCode290400 Gravity Yellow290400 Pump White294400 Gravity Pump294400 Pump None303400 Gravity B

118The crankcase capacity of Vanguard V-Twinengines is approximately:• All (except Model 540000) – 48 oz. (1.4liters) with filter• Models 540000, 610

13LOCKED FOR PRINTING – SELECT SECT. NEEDED >189Drill Size – Decimal Equivalent (Inches)60 0.040 9/64 0.1406 E, 1/4 0.25059 0.041 27 0.144 F

13190English to Metric Conversion TableFraction Decimal mm Fraction Decimal mm1/64 0.0156 0.39633/64 0.5156 13.0961/32 0.0313 0.795 17/32 0.5313 13.49

1LOCKED FOR PRINTING – SELECT SECT. NEEDED >1Section 1Safety, Maintenance and AdjustmentsPageAIR CLEANER SERVICE 9. . . . . . . . . . . . . . . . .

1LOCKED FOR PRINTING – SELECT SECT. NEEDED >19Fig. 323. With equipment control lever in SLOW positionand engine running at governed idle RPM, us

1205. Turn fixed speed adjustable control nut (6)clockwise (8) to increase or counter-clockwise(7) to decrease engine speed until desired TopNo-Load R

1LOCKED FOR PRINTING – SELECT SECT. NEEDED >21TABLE NO. 1GeneratorTypeTop No-LoadRPMRegulatedNo-Load RPM3600 RPM60 Cycle4250 RPM 3750 RPM3000 RPM50

122Fig. 437. With equipment control lever in SLOW positionand engine running at governed idle RPM, useTang Bender #19352 (1), and bend throttlerestr

1LOCKED FOR PRINTING – SELECT SECT. NEEDED >23Fig. 47All Except Models 540000, 610000Resistor spark plugs recommended by Briggs &Stratton:• B&

124TUNE-UP PROCEDUREA “Tune-Up,” see the steps listed below, would normally be performed on relatively new engines brought in forminor difficulties. B

1LOCKED FOR PRINTING – SELECT SECT. NEEDED >2523. Cylinder – check cylinder bores and bearings.Remove oil seal.24. Disassemble and check connecting

126For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983www.mymowerparts.com

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >27Section 2TroubleshootingPageELECTRICAL SYSTEMS 32. . . . . . . . . . . . . . . . . . . . . . . . . .

228Most complaints concerning engine operation can beclassified as one or more of the following:1. Will not start2. Hard starting3. Lack of power4. Ru

12IN THE INTEREST OF SAFETYDANGER• Before attempting to service this equipment,read and understand this manual and theoperating instructions.• Failure

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >29Fouled Plug or Dead CylinderTo test for a fouled spark plug or a non-functioningcylinder, attach Igni

230Cylinder Leakdown TestUse a leakdown tester to test the sealing capabilityof each cylinder. Follow the instructions for the leak-down tester you ar

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >31Fig. 64. Ground the other spark plug and again note theRPM loss.If the difference between the two

232ELECTRICAL SYSTEMSAlternatorsAlternator System DiagnosisThe following list is provided to help diagnose alternator system problems.COMPLAINT POSSIB

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >33Charging System IdentificationTable No. 1 provides a means of identifying the various alternator syst

234Flywheel Magnet IdentificationNOTE: Does NOT include engines with the Power-Linkt system.The V-Twin flywheels have a ring of magnets (1) onthe insi

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >35Testing Alternator OutputWhen testing alternators, perform the tests in thefollowing sequence.NOTE: B

236DC AlternatorThe DC alternator provides DC current for charginga 12 volt battery. The current from the alternator isunregulated and is rated at 3 a

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >37AFig. 14NOTE: Service replacement diode harnesses areavailable. Use resin core solder wheninstalli

238Diode TestIn the DIODE TEST position, the meter will displaythe forward voltage drop across the diode(s). If thevoltage drop is less than 0.7 volts

1LOCKED FOR PRINTING – SELECT SECT. NEEDED >3Gasoline and its vapors are extremelyflammable and explosive.Fire or explosion can cause severeburns o

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >39The battery is not used for the lights, so lights areavailable even if the battery is disconnected or

240Fig. 21ALighting Circuit Test (WHITE Wire)1. Insert RED test lead into V receptacle in meter.2. Insert BLACK test lead into COM receptacle.3. R

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >41Output TestWHEN CHECKING ALTERNATOR COMPONENTSMAKE TESTS IN THE FOLLOWING SEQUENCE:Temporarily discon

2422. Two BLACK leads (2) from stator.3. YELLOW connector (3) with two pin terminals.4. Two YELLOW leads (4) to regulator-rectifier.5. Regulator-recti

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >437. If NO or LOW output is found, be sure thatregulator-rectifier is grounded properly and allconnect

2444. Attach RED (2) and BLACK (1) test lead probesto the YELLOW wire (4) AC output terminals (6),of the connector (3), as shown in Fig. 31. (Metertes

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >45POWERLINKt SYSTEMSome V-Twin engines are equipped with the Power-LinktSystem, an on-board generator s

2464. Test for continuity between the inverter case andthe GFCI ground.There should be CONTINUITY in Step 3 and Step 4.If there is NO CONTINUITY a pro

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >47If the previous tests have not revealed a faultycomponent it is necessary to check the alternatoroutp

248Test EquipmentDigital Multimeter #19464.The following tests will be performed with the meterin the V== (DC volts) position, Fig. 40.Fig. 40Equipmen

14WARNINGEngines give off carbonmonoxide, an odorless, colorless,poison gas.Breathing carbon monoxide cancause nausea, fainting or death.• Start and r

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >49Installation1. Before installing battery, connect all equipmentto be operated. See typical wiring dia

250A jumper wire is required for this test.Make sure key switch is OFF before connectingjumper wire.NOTE: Mark or identify the charging indicator wire

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >51Fig. 46Engine Wiring1. With key switch OFF, re-connect equipmentwiring harness to engine wiring ha

252ENGINE HARNESS CONNECTOREngine Runs (Both Cylinders)1 Closed DiodeEngine Won’t Shut OffOnly One Cylinder Shuts Off1 Open Diode2 Closed Diodes2 Open

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >53Oil PressureTest SwitchUse Digital Multimeter #19464. Set meter to test forcontinuity.Remove pressure

254NOTE: Terminals #1, #3 and #6 are grounded to keyswitch case when key switch is OFF. Metermust indicate CONTINUITY between theseterminals and the k

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >55Terminal No. Wire Color Function1 Not Used2 White To Carburetor Solenoid (when used)3 Black To Stop S

256Starter MotorConditions Affecting Starter Motor Performance1. Bound or seized starter motor bearings.2. A shorted, open or grounded armature.a. Sho

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >57Fig. 51Solenoid TestThe starter solenoid is a normally open, electricallyactivated switch. When

258PERFORMANCE CONTROLELECTRONIC GOVERNORSome V-Twin engines are equipped with thePerformance Control electronic governor systemfor generator or wel

1LOCKED FOR PRINTING – SELECT SECT. NEEDED >5Additional PrecautionsBefore working on the engine, read and understandthe applicable sections of this

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >59Governor TestDynamic CheckPerform dynamic check exactly in order shown.1. Start engine and check RPM.

2602. Remove air cleaner assembly.3. Disconnect governor link at carburetor.4. Remove governor control bracket with actuator.5. Disconnect governor li

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >61GASEOUS FUELED ENGINESTROUBLESHOOTING GUIDESymptom Potential Cause ActionPlugged vent ports on the re

262TROUBLESHOOTING GUIDE (CONTINUED)Out of fuel. Refuel the tank.Fuel supply shut off. Open fuel tank.Engine will not start.Filter or vacuum lock off

2LOCKED FOR PRINTING – SELECT SECT. NEEDED >63GASEOUS FUEL CARBURETORADJUSTMENTSome Briggs & Stratton V-Twin engines wereavailable factory-bui

264EQUIPMENT PROBLEMS AFFECTING ENGINE OPERATIONFrequently, what appears to be an engine problemmay be the fault of the equipment powered ratherthan t

3LOCKED FOR PRINTING – SELECT SECT. NEEDED >65Section 3Engine DisassemblyPageAFTER DISASSEMBLY 74. . . . . . . . . . . . . . . . . . . . . . . . .

366PARTS IDENTIFICATIONCARBURETOR COVERVALLEY COVERBLOWER HOUSINGROTATING SCREENGOVERNOR LEVERINTAKE MANIFOLDAND CARBURETORCHOKE BRACKETGOVERNOR CONTR

3LOCKED FOR PRINTING – SELECT SECT. NEEDED >67ARMATURESCRANKSHAFTBACKPLATEALTERNATOR#2 PISTON AND CONNECTINGROD ASSEMBLYSTARTER MOTORBREATHER#1 PIS

368ENGINE DISASSEMBLYPreparation• Drain oil. Remove and discard oil filter.• Disconnect choke and throttle control cables.• Remove engine from equipme

6BRIGGS & STRATTON NUMERICAL IDENTIFICATION SYSTEMYOUR KEY TO THE WORLD'S FINEST ENGINESThis chart explains the unique Briggs & Stratton

3LOCKED FOR PRINTING – SELECT SECT. NEEDED >69Fig. 4Horizontal Crankshaft – Models 351400 – 3804001. Remove air cleaner cover, cartridge and pre-

370Remove Carburetor and Intake ManifoldVertical Crankshaft, All Models1. Remove air cleaner assembly.2. Remove two screws (2) and choke controlbracke

3LOCKED FOR PRINTING – SELECT SECT. NEEDED >71Fig. 13Remove FlywheelFlywheel Nut – Models 290000, 303000, 540000,6100001. Prevent the flywheel fro

372Flywheel – Models WITH PowerLinktCAUTION• The flywheel magnets are VERY POWERFULand can rapidly draw the flywheel to theengine. Exercise caution an

3LOCKED FOR PRINTING – SELECT SECT. NEEDED >73Remove Breather and Starter Motor1. Remove breather (3), alternator (6), backplate(5) and starter mot

374Fig. 24Fig. 25Remove Camshaft1. Remove governor spool (8) from camshaft (7),Fig. 26. Discard gasket and O-ring.2. Rotate crankshaft and camsha

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >75Section 4Fuel Systems and CarburetionPageCARBURETION 79. . . . . . . . . . . . . . . . . . . . . . .

476FUEL SYSTEMS7 Quart Fuel TankRemoval1. Remove air cleaner knob (1) and cover (2),Fig. 1.2. Remove air cleaner nut (3), top plate (4) andelement (5)

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >77NOTE: Install the supports over the governorcontrol bracket, one side at a time to avoiddisturbing th

4785. Lift the fuel tank. Disconnect the fuel hose fromthe carburetor fuel inlet (6), Fig. 10. Remove thefuel valve shut-off knob from the shut-off li

1LOCKED FOR PRINTING – SELECT SECT. NEEDED >7FUEL & OIL RECOMMENDATIONSFuel RecommendationsGasoline Engines• Use clean, fresh regular unleaded

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >79Fuel FilterReplace the inline fuel filter yearly or every 100hours, whichever occurs first. Replace t

480Fig. 16Models 351400 and 380400The blower housing must be removed so that anti-afterfire solenoid wire can be properly routed duringreassembly.1

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >81Fig. 20111213141511Carburetor ServiceAisan CarburetorModels 290700, 303700, 350700(After 950930xx)Che

482Fig. 244. Remove fixed main jet (7) using Screwdriver#19062, Fig. 25.5. Reach into carburetor throat with flat bladescrewdriver and push down on e

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >83Fig. 301517181613. Remove screw (25) and choke plate (24),Fig. 31.CAUTION• Carburetor body has a dete

484NOTE: Do not use wire, drills or other mechanicaldevices to clean out metering holes orpassages.Inspect CarburetorInspect all parts for wear, crack

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >85Fig. 3716161718. Install idle jet (18), plug (19) and gasket (20),Fig. 38.Fig. 3818192019. Install id

486Fig. 42Replace either shaft if worn.Replace the carburetor if the body is worn or if eithershaft clearance exceeds 0.010” (0.25 mm) when anew shaf

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >87NOTE: The top and bottom edges of the throttleplate are beveled. Mark throttle plate beforeremoving t

488Clean Carburetor1. Disassemble carburetor.2. Remove and discard all old gaskets, seals andsealing material.AVOID INJURY!• Wear suitable protection

18Oil RecommendationsOil has four purposes. It cools, cleans, seals and lu-bricates. During normal operation, small particles ofmetal from the cylinde

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >89NOTE: Use LOCTITE 222 on screw threads.Fig. 53141516111213121312. Assemble inlet needle retainer (19

490Nikki CarburetorModels 351700, 351400, 380700, 380400Check Throttle, Choke Shaft and Body For WearNOTE: The measurement in Step 1 is taken with the

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >91Fixed Main Jet SizesModel 351700Left (#1) cylinder is equipped with #98 main jet. Right (#2) cylinder

492NOTE: If idle mixture screws are equipped withadjustment limiter caps, remove the caps(18) BEFORE removing idle mixturescrews, inset, Fig. 65.Fig.

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >93Inspect CarburetorInspect all parts for wear, cracks, nicks and burrs.Inspect float for leaks. Replac

494Fig. 7217181912. Install fixed main jets (20), Fig. 73, plugs andwashers.Model 351700Left (#1) cylinder is equipped with #98 main jet.Right (#2) cy

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >95Fig. 76NOTE: The inspection in Step 2 is performed afterthe carburetor has been disassembled.2. Ins

4968. The top and bottom edges of the throttle plateare beveled. Mark throttle plate (11), Fig. 82before removal to ensure reinstallation in theorigin

4LOCKED FOR PRINTING – SELECT SECT. NEEDED >97Inspect CarburetorInspect all parts for wear, cracks, nicks and burrs.Inspect float for leaks. Replac

498NOTE: Use brass inlet needle for fuel pumpcarburetors. Use aluminum inlet needle forgravity feed carburetors.Fig. 9018The fuel inlet seat orifice s