Briggs & Stratton 276535, 271172, 270962, CE8069, 273521 manual Main Bearing

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REJECT DIMENSIONS	STANDARD SIZE	REJECT SIZE
CYLINDER
Main Bearing	1.6248 in. (41.27 mm)	1.629 in. (41.38 mm)
Camshaft Bearing	.5011 in. (15.88 mm)	.504 in. (12.80 mm)
Bore Diameter	3.701 in. (94.01 mm)	3.705 in. (94.11 mm)
Bore Out-Of-Round	N/A	.0015 in. (.04 mm)
CYLINDER HEAD
Valve Guide	.237 in. (6.02 mm)	.240 in. (6.10 mm)
Intake Valve Stem Diameter	.235 in. (5.97 mm)	.233 in. (5.92 mm)
Exhaust Valve Stem Diameter	.235 in. (5.97 mm)	.233 in. (5.92 mm)
CYLINDER COVER
Main Bearing	1.6248 in. (41.27 mm)	1.629 in. (41.38 mm)
Camshaft Bearing	.501 in. (12.72 mm)	.504 in. (12.80 mm)
CRANKSHAFT
Crank Pin Journal	1.6235 in. (41.24 mm)	1.6225 in. (41.21 mm)
Mag-Side Journal	1.6235 in. (41.24 mm)	1.6225 in. (41.21 mm)
PTO-Side Journal	1.6235 in. (41.24 mm)	1.6225 in. (41.21 mm)
Eccentrics	2.681 in. (68.10 mm)	2.6793 in. (68.05 mm)
CAMSHAFT
Mag-Side Journal	.499 in. (12.67 mm)	.498 in. (12.65 mm)
PTO-Side Journal	.499 in. (12.67 mm)	.498 in. (12.65 mm)
Intake Lobes	1.240 in. (31.49 mm)	1.234 in. (31.34 mm)
Exhaust Lobes	1.240 in. (31.49 mm)	1.234 in. (31.34 mm)
CONNECTING ROD
Crank Pin Bearing	1.100 in. (37.06 mm)	1.102 in. (27.99 mm)
Piston Pin Bearing	.6258 in. (15.89 mm)	.6268 in. (15.92 mm)
COUNTERWEIGHT SYSTEM
Pivot Shaft Bore	1.100 in. (37.06 mm)	1.102 in. (27.99 mm)
Counterweight Pin Bore	1.100 in. (37.06 mm)	1.102 in. (27.99 mm)
Link Pin	1.100 in. (37.06 mm)	1.102 in. (27.99 mm)
Connector Link Bore	1.100 in. (37.06 mm)	1.100 in. (27.99 mm)
Eccentric Bearing	.6258 in. (15.89 mm)	.6268 in. (15.92 mm)
PISTON
Piston Pin	.6247 in. (15.86 mm)	.6242 in. (15.85 mm)
Piston Pin Bearing	.6258 in. (15.89 mm)	.6268 in. (15.92 mm)
Ring End Gap (Top)	.006-.010 in. (.15-.35 mm)	.020 in. (.51 mm)
Ring End Gap (Middle)	.012-.020 in. (.30-.51 mm)	.030 in. (.76 mm)
Ring End Gap (Oil Control)	.020-.025 in. (.50-.63 mm)	.035 in. (.89 mm)
Ring Land Clearance (Top)	.002-.003 in. (.05-.08 mm)	.004 in. (.10 mm)
Ring Land Clearance (Middle)	.002-.003 in. (.05-.08 mm)	.004 in. (.10 mm)
Ring Land Clearance (Oil Control)	.002-.003 in. (.05-.08 mm)	.004 in. (.10 mm)

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Contents Single Cylinder OHV Air-CooledEngines Briggs & ledooStrattonQuality Starts With A Master Service Technician Repair Manuals for otherCopyright 2009 Briggs & Stratton Corporation FORWARDAll rights reserved This Engine Repair Manual includes the following Engine ModelsSECTION 1 - Safety, Maintenance and Adjustments 1 2 3 4 5 6 7 8 9 10 11 12SECTION 2 - Troubleshooting Page SECTION 1 - SAFETY, MAINTENANCE, AND ADJUSTMENTS Signal Words in Safety Messages ENGINE SAFETYHazard Symbols and Meanings Before performing adjustments or repairs When testing for sparkExplosion and fire could result BRIGGS & STRATTON MODEL NUMBERING SYSTEM BRIGGS & STRATTON NUMERICAL IDENTIFICATION SYSTEMYOUR KEY TO THE WORLD’S FINEST ENGINES Fuel must meet these requirements ENGINE MAINTENANCEFuel and Oil Recommendations High AltitudeEvery 25 Hours or Annually Maintenance Chart First 5 HoursEvery 8 Hours or Daily Every 50 Hours or AnnuallyInspect Brake and Switches Assemble Flywheel BrakeCombustion Chamber Air FilterFigure Figure Figure Figure Figure FigureRemove InstallSnow Hood InspectionNOTICE Oil and Oil FilterSpark Plug NOTICECooling System Remote Control Wire Travel ENGINE ADJUSTMENTSRemote Controls Horizontal Models 110000, 120000,2.Move throttle lever to fast position Static Adjustment Governor AdjustmentsTop No Load Adjustment Vertical Models 97700, 2.Place throttle in FAST position Initial Adjustment All Models Final Adjustment All ModelsAdjust Valve Clearance Vertical Models 110000, 120000 Early Production SECTION 2 - TROUBLESHOOTING OIL GARD SYSTEMS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49 ENGINE WILL NOT START - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49 ENGINE STARTS AND RUNS WITH LOW OIL Engine Stopped SYSTEMS CHECK1 Check Ignition Engine Running2 Check Carburetion Testing Fuel Shut Off SolenoidSolenoid Wiring Test Solenoid Plunger Test3 Check Compression Possible Causes for Poor CompressionDigital Multimeter ELECTRICAL SYSTEMSEquipment Used for Testing DC ShuntComplaint Alternator System DiagnosisPossible Causes Alternator Identification 3.3 Amp DC Only Figure 1.0.5 Amp DC Only Figure2.14 Volt AC Only Figure 4.Dual Circuit Figure7.10/16 Amp DC Figure 6.5/9 Amp DC Figure8.20 Amp DC Figure 5 Amp DC Only Alternator Testing Alternator OutputFlywheel Identification 3-AmpDC Only Alternator14-VoltAC Alternator Test DiodeTest Alternator Output-AC Dual Circuit AlternatorTest Alternator Output Test Alternator Output-DCTri-CircuitAlternator Test DiodeTest Alternator Output Charging Circuit Test RED WireLighting Circuit Test WHITE Wire Test DiodeTest Alternator Output 5 & 9 Amp DC Regulated AlternatorTest Regulator-Rectifier receptacle 10 & 16 Amp DC Regulated AlternatorTest Alternator Output Test Regulator - Rectifier2.Install shunt to negative -battery terminal NOTICE DC Output Charging Wire Test20 Amp DC Regulated Alternator Test Alternator OutputFigure 5.Rotate selector to DC volts positionSYSTEM 3, SYSTEM ELECTRIC STARTERSModel Series 97700, 99700, 110000, Test Interlock Switch Test Starter Motor12 Volt DC Starter Motor Test Interlock Switch WiringTest Starter Motor Model Series 120000, 150000, 200000, 120-VoltAC Starter MotorTest Solenoid Battery Installation BATTERIESBattery and Cable Recommendations Charging BatteryTesting Battery Hard Starting or Will Not Start EQUIPMENT AFFECTING ENGINE OPERATIONOIL GARD SYSTEMS Engine Won’t StopOn/Off Switch Light Does Not Flash Engine Starts and Runs With Low OilSECTION 3 - EXHAUST SYSTEMS Horizontal Models 110000, 120000, MUFFLER SERVICESpark Arresters Remove Guard and MufflerInstall Muffler and Guard Never reinstall broken or damaged componentsInspect Exhaust System Remove Guard and Muffler Horizontal Models 200000,Shown is a typical muffler application Figure 3.Remove muffler support screws A, FigureInspect Exhaust System Never reinstall broken or damaged componentsInstall Muffler and Guard All exhaust system components must be inspected whenever the exhaust system is disassembled. Check muffler mounting bracket and/or muffler adapters for cracked welds or breakage. Check muffler for split seams, loose internal parts, or cracked welds. Replace any damaged parts with new OEM partsVertical Models 97700, 99700, 110000, Never reinstall broken or damaged componentsInstall Muffler and Guard Inspect Exhaust SystemInspect Exhaust System Never reinstall broken or damagedInstall Muffler and Guard componentsRemove Muffler Never reinstall broken or damaged componentsInspect Exhaust System Install Muffler Shown is a typical muffler application Figure Never reinstall broken or damaged componentsInstall Muffler Remove MufflerSECTION 4 - FUEL SYSTEMS AND CARBURETION FUEL SYSTEMS Removal InstallationFuel Pump InspectionHorizontal Models 110000, 120000, 150000, 200000, Fuel FilterFuel Tanks and Shut-offValves RemovalVertical Models 97700, 99700, 110000, InstallationInstallation Vertical ModelInspection Installation2.Inspect fuel tank for •Corrosion •Leaks CARBURETION Carburetor IdentificationVertical Models 97700, 99700, 110000, Carburetor Service LMS CarburetorRemove Carburetor Disassemble Carburetor Inspect and Clean Carburetor Components Assemble CarburetorInstall Carburetor LMS Carburetor Horizontal Models 110000, 120000, Remove Carburetor•Passages in the fixed main jet bowl nut Inspect and Clean Carburetor ComponentsDisassemble Carburetor Assemble Carburetoredge of the plug with a non-hardeningsealant ReadyStart Carburetor Vertical Model Install CarburetorRemove Carburetor Disassemble Carburetor Inspect and Clean CarburetorAssemble Carburetor LMT Carburetor 3.Move clamp and disconnect hose from carburetor Remove CarburetorDisassemble Carburetor Inspect and Clean Carburetor Assemble CarburetorPage Install Carburetor bracket.4Remove Carburetor Nikki Carburetor Vertical Models 280000, 310000,Disassemble Carburetor Inspect and Clean Carburetor 11.Remove the main jet and seal•Choke shaft and choke valve Assemble Carburetor12.Install new o-ringon fuel transfer tube E Install CarburetorNikki LP/NG Mixer Vertical Model 310000 Gaseous FuelSECTION 5 - GOVERNOR SYSTEMS GOVERNOR SYSTEMS Linkage and Spring OrientationHorizontal Models 110000, 120000, 150000, 200000, Governor ServiceGoverned RPM Limits DisassembleInspect Governor AssembleInspect Governor DisassembleAssemble Governor 8. Adjust governor system per Section SECTION 6 - CYLINDER HEAD AND VALVES CYLINDER HEADS AND VALVES Remove Cylinder HeadDisassemble Cylinder Head InspectionAssemble Cylinder Head Install Cylinder Head NOTE: Do not torque each screw in one step as it may result in a warped cylinder head. Step- torque all screws to approximately 1/3 of final torque value, then to 2/3 final torque value, then finish at final torque value Disassemble Cylinder Head Remove Cylinder HeadModels 200000, 210000, 280000, 310000, InspectionInstall Cylinder Head mm or more, replace the entire head. If plug gauge is not available, see Section 12 - Engine Specifications for the valve guide reject dimensionAssemble Cylinder Head 4.Install push rods through guides and into same positions as removed. Ensure rods are seated in valve tappets. Place valve stem caps if used on valve stems Figure Page SECTION 7 - STARTERS Horizontal Models 110000, 120000, 150000, 200000, REWIND STARTERSRemove Blower Housing / Rewind Starter Vertical Models 97700,Vertical Models 110000, Vertical Model Service Rewind StarterDisassemble Rewind Starter Inspect Rewind Starter Parts Assemble Rewind StarterVertical Models 97700, 2.Install the oil fill tube and dipstick CVertical Models 110000, Disassemble Starter Clutch Service Starter ClutchVertical Model Inspect Clutch PartsSystem 3, System ELECTRIC STARTERSReplace Ring Gear Check Starter Drive and ClutchRemove Starter Drive and Clutch Install Starter Drive and Clutch12 Volt Starters Check Starter Drive and ClutchAssemble Starter Motor Drive - C-Ring Retainer Disassemble Starter Drive - Roll Pin Retainer 120-VoltStarters Assemble Starter Drive - Roll Pin RetainerSECTION 8 - LUBRICATION SYSTEMS Install Breather EXTENDED OIL FILL AND DIPSTICKBREATHERS Horizontal Models 110000, 120000,Check Breather 3.Inspect oil drain-backholes C, Figure 3 to make sure they are open. Clean as neededInstall Breather Remove BreatherRemove Breather Install Breather8Current Production Check BreatherOil Dipper Lubrication LUBRICATION SYSTEMSInstall Breather Oil Slinger LubricationPressure Lubrication Oil Pump ServiceOil Slinger with Pressure Filtration Vertical Models 120000, 210000, 280000, 310000,Remove Pump Screen Inspect Oil Pump Parts Install Screen and Gerotor PumpOil Filter and Adapters Remove Test Oil Pressure Switch Oil Pressure SwitchInstall Oil Gard SystemsTroubleshooting Lead Wire ColorsLead Wire Colors IdentificationSECTION 9 - CYLINDERS, COVERS AND SUMPS Reconditioning Bore CYLINDERInspect Cylinder Resizing BoreCheck Bearings MAIN BEARINGSCleaning Cylinder Check Plain BearingsMagneto Bearing Tools Replace BearingsReplace DU Bearings PTO Bearing ToolsReplace Ball Bearing Horizontal Models 120000, Bearing Removal Tools Bearing Installation ToolsReplace Ball Bearing Horizontal Models 200000, Tool/PartReplace Ball Bearing All Vertical Models COVERS AND SUMPS InstallationFigure Figure FigurePage SECTION 10 - CRANKSHAFTS, CAMSHAFTS, BALANCING SYSTEMS, AND GEAR REDUCTIONSInspect CRANKSHAFTS AND CAMSHAFTSRemove Crankshaft and Camshaft Check CrankshaftInstall Crankshaft and Camshaft Install Crankcase Cover or Sump Check and Adjust Crankshaft End Play Assemble Gear Reduction GEAR REDUCTIONDisassemble Gear Reduction Inspect Gear Reduction PartsFill Gear Case with Lubricant Remove Auxiliary PTO Drive Shaft AUXILIARY PTOInspection Assemble Auxiliary PTO Drive ShaftDisassemble COUNTERBALANCE SYSTEMSSynchro-BalanceSystem Remove Counterbalance SystemInstall AssembleRemove InstallAVS Balance System DisassemblePage SECTION 11 - PISTONS, RINGS AND CONNECTING RODS Disassemble PISTONS, RINGS, & CONNECTING RODSRemove Piston and Connecting Rod InspectAssemble Check Connecting RodCheck Ring End Gap Install Piston and Connecting Rod SECTION 12 - ENGINE SPECIFICATIONS FASTENER TORQUE SPECIFICATIONS MODEL 110000 HORIZONTAL SERIESENGINE SPECIFICATIONS TORQUEREJECT DIMENSIONS FASTENER TORQUE SPECIFICATIONS MODEL 120000 HORIZONTAL SERIESENGINE SPECIFICATIONS TORQUEMain Bearing FASTENER TORQUE SPECIFICATIONS MODEL 150000 HORIZONTAL SERIESENGINE SPECIFICATIONS TORQUEREJECT DIMENSIONS FASTENER TORQUE SPECIFICATIONS MODEL 200000 HORIZONTAL SERIESENGINE SPECIFICATIONS TORQUEMain Bearing FASTENER TORQUE SPECIFICATIONS MODEL 210000 HORIZONTAL SERIESENGINE SPECIFICATIONS TORQUEMain Bearing FASTENER TORQUE SPECIFICATIONS MODELS 97700 & 99700 VERTICAL SERIESENGINE SPECIFICATIONS TORQUEREJECT DIMENSIONS FASTENER TORQUE SPECIFICATIONS MODEL 110000 VERTICAL SERIESENGINE SPECIFICATIONS TORQUEREJECT DIMENSIONS FASTENER TORQUE SPECIFICATIONS MODEL 120000 VERTICAL SERIESENGINE SPECIFICATIONS TORQUEREJECT DIMENSIONS FASTENER TORQUE SPECIFICATIONS MODEL 210000 VERTICAL SERIESENGINE SPECIFICATIONS TORQUEREJECT DIMENSIONS FASTENER TORQUE SPECIFICATIONS MODEL 280000 VERTICAL SERIESENGINE SPECIFICATIONS TORQUEMain Bearing FASTENER TORQUE SPECIFICATIONS MODEL 310000 VERTICAL SERIESENGINE SPECIFICATIONS TORQUEMain Bearing FASTENER TORQUE SPECIFICATIONS MODEL 330000 VERTICAL SERIESENGINE SPECIFICATIONS TORQUEMain Bearing

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