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Tecumseh 3-11 HP 4-Cycle L-Head Engines Technician Handbook
Models:
ECV100 - 120, H22 - 80, HH40 - 70, HHM80, HM70 - 100,
HMSK70 - 110, HMXL70, HS40 - 50, HSK30 - 70, HSSK40 - 50,
HT30 - 35, HXL35, LAV30 - 50, LEV80 - 120, TNT100 - 120,
TVM125 - 220, TVXL170 - 220, TVS75 - 120, TVXL105 - 115,
V40 - 80, VH40 - 70, V60 - 70, VM70 - 100
Manuals Includes info on:
CHAPTER 1 GENERAL INFORMATION ................................................................................. 1
ENGINE IDENTIFICATION .................................................................................................... 1
INTERPRETATION OF MODEL NUMBER ............................................................................. 1
SHORT BLOCKS ..................................................................................................................... 2
FUEL ................................................................................................................................................ 2
ENGINE OIL ............................................................................................................................ 3
TUNE-UP PROCEDURE .......................................................................................................... 3
STORAGE ...............................CHAPTER 2 AIR CLEANERS ...............................
INFORMATION ............................................................................................................................ 5
OPERATION .............................................................................................................................. 5
COMPONENTS................................................................................................................................ 5
TROUBLESHOOTING OR TESTING ................................................................................... 5
SERVICE .................................................................................................................................... 6
DISASSEMBLY PROCEDURE ................................................................................................... 6
POLYURETHANE-TYPE FILTER ELEMENT ..................................................................... 6
PAPER-TYPE FILTER ELEMENT ......................................................................................... 6
CHAPTER 3 CARBURETORS AND FUEL SYSTEMS ........................................................... 7
GENERAL INFORMATION ................................................................................................. 7
OPERATION .......................................................................................................................... 8
FUEL PRIMERS ........................................................................................................................... 8
IMPULSE FUEL PUMPS ......................................................................................................... 9
FLOAT STYLE CARBURETORS ....................................................................................... 9
DIAPHRAGM (PRESSURE DIFFERENTIAL) CARBURETORS .......................................... 9
COMPONENTS................................................................................................................... 10
CARBURETOR IDENTIFICATION ................................................................................. 11
DUAL SYSTEM CARBURETORS.................................................................................. 11
SERIES 1 CARBURETORS ................................................................................................. 11
SERIES 3 & 4 CARBURETORS ........................................................................................... 11
DIAPHRAGM CARBURETORS ......................................................................................... 11
SERIES 6 CARBURETORS 4-CYCLE.............................................................................. 12
SERIES 8 ....................................................................................................................... 12
SERIES 9 ...................................................................................................................... 12
SERIES 10 (EMISSION) .................................................................................................. 12
SERIES 11 ......................................................................................................................... 12
SERIES 11 BRIDGED ................................................................................................... 13
NON-TECUMSEH CARBURETORS -- DELLORTO CARBURETOR ............................ 12
ENGINE TROUBLESHOOTING CHART ........................................................................ 13
CARBURETION TROUBLESHOOTING CHART ........................................................... 14
TESTING ............................................................................................................................ 15
SERVICE .............................................................................................................................. 15
CARBURETOR PRE-SETS AND ADJUSTMENTS ............................................................. 15
FINAL ADJUSTMENTS (NON-EMISSION ENGINES)...................................................... 16
NON-ADJUSTABLE CARBURETOR .................................................................................... 16
DISASSEMBLY PROCEDURE .......................................................................................... 17
FLOAT STYLE CARBURETORS ...................................................................................... 17
DIAPHRAGM CARBURETORS ............................................................................................. 19
FLOAT ADJUSTING PROCEDURE..................................................................................... 19
INSPECTION ............................................................................................................................ 20
ASSEMBLY ................................................................................................................................. 21
STANDARD SERVICE CARBURETORS ................................................................................ 24
CHAPTER 4 GOVERNORS AND LINKAGE ........................................................................ 26
GENERAL INFORMATION ..................................................................................................... 26
OPERATION ........................................................................................................................... 26
INTERNAL COMPONENTS (VARIOUS STYLES) ................................................................ 26
TROUBLESHOOTING ........................................................................................................... 26
ENGINE OVERSPEEDING ....................................................................................................... 27
ENGINE SURGING .................................................................................................................... 27
SERVICE ............................................................................................................................. 27
GOVERNOR ADJUSTMENT ................................................................................................ 27
GOVERNOR ADJUSTMENT PROCEDURE FOR SHORT BLOCK INSTALLATIONS .. 27
GOVERNOR GEAR AND SHAFT SERVICE ........................................................... 28
SPEED CONTROLS AND LINKAGE ...................................................................... 29
CHAPTER 5 REWIND STARTERS ............................................................................... 35
GENERAL INFORMATION ............................................................................................. 35
OPERATION ................................................................................................................... 35
COMPONENTS................................................................................................................... 35
SERVICE ............................................................................................................................... 35
ROPE SERVICE ..................................................................................................................... 35
RETAINER REPLACEMENT ............................................................................................ 36
STYLIZED REWIND STARTER (TVS, HM, TVM, TVXL), AND STAMPED STEEL STARTER
(HM, VM, TVM, TVXL)............................................. 36
STYLIZED REWIND STARTER WITH PLASTIC RETAINER ................................................ 37
STANDARD STAMPED STEEL AND CAST ALUMINUM STARTER (HM, VM) ................. 38
VERTICAL PULL STARTER HORIZONTAL ENGAGEMENT TYPE ........................... 39
VERTICAL PULL STARTER VERTICAL ENGAGEMENT TYPE ................................... 40
CHAPTER 6 ELECTRICAL SYSTEMS ...................................................... 42
GENERAL INFORMATION .............................................................................. 42
OPERATION .................................................................................................................. 42
STARTING CIRCUIT AND ELECTRIC STARTERS ...................................................... 42
CHARGING CIRCUIT .......................................................................................... 42
CONVERTING ALTERNATING CURRENT TO DIRECT CURRENT ............................... 43
HALF WAVE RECTIFIER SINGLE DIODE ............................................................. 43
FULL WAVE RECTIFIER BRIDGE RECTIFIER................................................... 43
COMPONENTS..................................................................................................... 43
BATTERY .......................................................................................................................... 43
WIRING ............................................................................................................................. 43
ELECTRICAL TERMS..................................................................................................... 44
BASIC CHECKS............................................................................................................ 45
TROUBLESHOOTING ELECTRICAL STARTER CIRCUIT FLOW CHART ........................ 46
TROUBLESHOOTING ELECTRICAL CHARGING CIRCUIT FLOW CHART ................. 47
TESTING PROCEDURE ................................................................................................ 48
STARTING CIRCUIT...................................................................................................... 48
CHARGING CIRCUIT ........................................................................................................... 48
VOLTAGE REGULATIONS .................................................................................................... 56
LOW OIL SHUTDOWN SWITCHES ...................................................................................... 56
SERVICE .............................................................................................................................. 57
12 VOLT OR 120 VOLT ELECTRIC STARTERS WITH EXPOSED SHAFT ...................... 57
12 VOLT D.C. OR 120 VOLT A.C. ELECTRIC STARTERS WITH THE STARTER GEAR UNDER
THE CAP ASSEMBLY......................................................................................... 57
INSPECTION ..................................................................................................................... 58
CHAPTER 7 FLYWHEEL BRAKE SYSTEMS.................................................................... 59
GENERAL INFORMATION ............................................................................................. 59
OPERATION ...................................................................................................................... 59
BOTTOM SURFACE SYSTEM .............................................................................................. 59
INSIDE EDGE SYSTEM ................................................................................................ 60
COMPONENTS................................................................................................................... 60
SERVICE .............................................................................................................................. 61
FLYWHEEL REMOVAL .................................................................................................. 61
BRAKE LEVER AND PAD ................................................................................................ 61
IGNITION GOUNDOUT TERMINAL .................................................................................... 61
STARTER INTERLOCK SWITCH .......................................................................................... 62
CONTROL CABLE .......................................................................................................... 62
BRAKE BRACKET REPLACEMENT ................................................................................... 62
CHAPTER 8 IGNITION ........................................................................................................... 63
GENERAL INFORMATION ................................................................................................. 63
OPERATION ............................................................................................................................ 63
SOLID STATE IGNITION SYSTEM (CDI) ............................................................................ 63
MAGNETO IGNITION SYSTEM (POINTS)
IDENTIFICATION OF TECUMSEH IGNITION SYSTEMS ............................................. 64
COMPONENTS............................................................................................................ 64
IGNITION TROUBLESHOOTING ..................................................................................... 66
TESTING PROCEDURE ............................................................................................... 67
SERVICE .............................................................................................................................. 68
SPARK PLUG SERVICE ..................................................................................................... 68
CONDITIONS CAUSING FREQUENT SPARK PLUG FOULING .......................................... 68
IGNITION TIMING PROCEDURE ......................................................................................... 68
SERVICE TIPS................................................................................................................ 71
CHAPTER 9 INTERNAL ENGINE AND CYLINDER ............................................................. 72
GENERAL INFORMATION .................................................................................................... 72
OPERATION .......................................................................................................................... 72
4-CYCLE ENGINE THEORY ............................................................................................... 72
LUBRICATION SYSTEMS .................................................................................................. 73
COUNTERBALANCE SYSTEMS ..................................................................................... 73
COMPONENTS.............................................................................................................. 74
ENGINE OPERATION PROBLEMS................................................................................... 75
TESTING .......................................................................................................................... 77
ENGINE KNOCKS .............................................................................................................. 77
ENGINE OVERHEATS ........................................................................................................... 77
SURGES OR RUNS UNEVENLY .............................................................................................. 77
ENGINE MISFIRES .................................................................................................................... 77
ENGINE VIBRATES EXCESSIVELY ..................................................................................... 78
BREATHER PASSING OIL .............................................................................................. 78
EXCESSIVE OIL CONSUMPTION ..................................................................................... 78
LACKS POWER ................................................................................................................. 78
SERVICE ..................................................................................................................................... 79
DISASSEMBLY PROCEDURE ................................................................................................. 79
CYLINDERS .............................................................................................................. 81
CYLINDER HEADS ..................................................................................................................... 82
PISTONS, RINGS AND CONNECTING RODS ......................................................................... 82
CRANKSHAFTS AND CAMSHAFTS ..................................................................................... 84
VALVES ....................................................................................................................................... 85
CRANKCASE BREATHERS ....................................................................................................... 86
CYLINDER COVER, OIL SEAL, AND BEARING SERVICE ........................................ 87
CRANKSHAFT BEARING SERVICE .................................................................................... 88
COUNTERBALANCE SERVICE ............................................................................................ 89
FLYWHEEL SERVICE ........................................................................................................ 89
CHAPTER 10 ENGINE SPECIFICATIONS .......................................................................... 90
FOUR CYCLE TORQUE SPECIFICATIONS .............................................................................. 91
ENGINE SPECIFICATIONS STANDARD POINT IGNITION ................................................ 93
SOLID STATE AND EXTERNAL IGNITION ................................................................ 97
CHAPTER 11 EDUCATION MATERIALS AND TOOLS ....................................................... 102
DECIMAL / FRACTION CONVERSIONS ..................................................................... 105
SEARS CRAFTSMAN CROSS REFERENCE SUPPLEMENT INCLUDED IN BACK OF BOOK
Index
File Format: PDF
Compatible: All Versions of Windows & Mac
Language: English
Requirements: Adobe PDF Reader
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