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Tecumseh OHH50 - 65 Technician's Handbook

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For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983
TECUMSEH
T E C H N I C I A N ' S
H A N D B O O K
This manual covers engine models:
OHH50 - 65, OHHSK50 - 130, OHV11 - OHV17, OVM120,
OVRM40-675, OVRM120, OVXL/C120, OVXL120, OVXL125.
Other illustrated Tecumseh 2-Cycle Engine, 4-Cycle Engine and
Transmission manuals; booklets; and wall charts are available
through Tecumseh.
For complete listing write or call
CONTAINS SEARS CRAFTSMAN CROSS REFERENCE
4-CYCLE
OVERHEAD
VALVE
ENGINES
www.mymowerparts.com

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  • Page 1 T E C H N I C I A N ' S H A N D B O O K This manual covers engine models: OHH50 - 65, OHHSK50 - 130, OHV11 - OHV17, OVM120, OVRM40-675, OVRM120, OVXL/C120, OVXL120, OVXL125. Other illustrated Tecumseh 2-Cycle Engine, 4-Cycle Engine and Transmission manuals;...
  • Page 2 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CONTENTS CHAPTER 1 GENERAL INFORMATION ....... CHAPTER 4 GOVERNORS AND LINKAGE ....CHAPTER 2 AIR CLEANERS ........CHAPTER 5 RECOIL STARTERS ......... CHAPTER 3 CARBURETORS AND FUEL SYSTEMS . CHAPTER 6 ELECTRICAL SYSTEMS ......
  • Page 3 All rights reserved. No part of this book may be reproduced or transmitted, in any form or by any means, electronic or mechanical, including photocopying, recording or by any information storage and retrieval system, without permission in writing from Tecumseh Products Company Training Department Manager.

  • Page 4: Chapter 1 General Information

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CHAPTER 1 GENERAL INFORMATION THIS ENGINE MEETS 1995-1998 CALIF. EMISSION REGULATIONS FOR ULGE ENGINES AS APPLICABLE FUEL: REGULAR UNLEADED OIL : USE SAE 30 OHV 125 203000A RTP358UIG2RA 358cc 3057D www.mymowerparts.com...
  • Page 5 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 * NOTE: Model OHSK110 with a spec. of 221000 and up, have a capacity of 26 oz. (720 ml.) www.mymowerparts.com...
  • Page 6 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 7 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 8 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 9 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 10 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 11 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 ALTERNATE LOCATION FOR MANUFACTURING NUMBER CARBURETOR MANUFACTURING DATE CODE NUMBER CHOKE PLATE FLAT DOWN www.mymowerparts.com...
  • Page 12 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TYGON TUBE EXTERNAL VENT INTERNAL VENT PRIMER BULB PRIMER BULB VENT MAIN NOZZLE MAIN JET CARBURETOR FITTING VALVE CLOSED VALVE OPEN ATMOSPHERIC DIAPHRAGM VENT FILTER AIR BLEED VALVE CLOSED VALVE OPEN...
  • Page 13 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 14 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CAPPED FIXED IDLE JET MIXING WELL CAST BUT NOT MACHINED IDLE JET CAST BUT NOT MACHINED LOW IDLE MIXTURE SCREW MAY BE ADJUSTABLE OR FIXED www.mymowerparts.com...
  • Page 15 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 16 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 SERIES "7" SERIES "3" & "4" MAIN MIXTURE IDLE MIXTURE SCREW SCREW SERIES "8" SERIES "9" SERIES "10" WALBRO LMK CAPPED FIXED IDLE JET www.mymowerparts.com...
  • Page 17 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CLIP LONG END OPEN END OF CLIP OF CLIP THROTTLE CHOKE www.mymowerparts.com...
  • Page 18 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 WALBRO LMK SERIES SMALL ATMOSPHERIC PIERCE PLUG CHISEL BRASS OR BALL PLUG VENT WITH TIP PRY OUT WELCH PLUG TO PLUG BE REMOVED DO NOT ALLOW CHISEL POINT ABOUT 1/8" TO STRIKE (3.175 mm)
  • Page 19 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 FLOAT FLOAT HINGE AND AXLE FLOAT SETTING 11 / 64" (4.36 mm) ADJUSTING TAB INLET NEEDLE AND SEAT "O" RING RETAINER NUT BRASS WASHER SPRING HIGH SPEED ADJUSTMENT SCREW IDLE FUEL...
  • Page 20 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 FLOAT HINGE SEAT NEEDLE FLOAT NEEDLE & SPRING CLIP SEAT MAIN NOZZLE HINGE PIN EMULSION SEAT RETAINING "O" RING "O" RING RING POSITIONED IN GROOVE NOZZLE SPRING IDLE RESTRICTION "O" RING...
  • Page 21 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 FLAT END PUNCH NEW WELCH PLUG SAME OR LARGER DIAMETER OF PLUG HOLE THROTTLE THROTTLE PLATE LEVER On Walbro LMK and Series 7 carburetors, install the DUST SEALS throttle return spring on the throttle shaft with the squared end up.
  • Page 22 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CHOKE PLATE FLAT DOWN SPRING HOOKUPS PRESS IN PARTIALLY SOME INLET FITTINGS THEN APPLY LOCTITE STRAINER "O" RING RETAINER NUT BRASS WASHER SPRING HIGH SPEED ADJUSTMENT SCREW FLOAT HINGE PIN FLOAT NEEDLE &...
  • Page 23 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 PUSH IN UNTIL SEAT RESTS ON BODY SHOULDER 5/32" (3.969 mm) FLAT PUNCH IF YOUR CARBURETOR SEAT HAS A STEEL SEAT RETAINING RING RE-INTSALL AFTER SEAT INSTALLATION INSERT THIS FACE FIRST...
  • Page 24 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CARBURETOR FITTING VALVE CLOSED VALVE OPEN ATMOSPHERIC DIAPHRAGM VENT FILTER AIR BLEED VALVE CLOSED VALVE OPEN PULSE LINE FUEL SUPPLY TO CRANKCASE CRANKCASE SUCTION AND SUCTION FUEL FLOW DIRECTION CRANKCASE PRESSURE...

  • Page 25: Governor Shaft

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 SPRING THROTTLE GOVERNOR SHAFT GOVERNOR WEIGHTS SPOOL GOVERNOR GEAR www.mymowerparts.com...
  • Page 26 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 THROTTLE OPEN PUSH (PUSH COUNTERCLOCKWISE) LEVER TO WIDE OPEN STANDARD THROTTLE LOCATION GOVERNOR GOVERNOR LEVER CLAMP GOVERNOR SCREW SCREW GOVERNOR GOVERNOR CLAMP TURN CLIP COUNTERCLOCKWISE ON ALL VERTICAL ROTATE CLAMP COUNTERCLOCKWISE SHAFT ENGINES EXCEPT VLV &...
  • Page 27 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 SERVICED AS ASSEMBLY RETAINING RETAINING RING RING SPOOL SPOOL SPOOL SPOOL SPOOL WASHER UPSET WASHER RETAINING RETAINING RING RETAINING RING RING SHAFT GEAR ASSY. GEAR ASSY. SHAFT GEAR ASSY. (GOV.) (GOV.) (GOV.)
  • Page 28 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 HIGH SPEED STOP www.mymowerparts.com...
  • Page 29 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 WINTER APPLICATION CONTROL GOVERNED IDLE LINK ADJUSTMENT HIGH SPEED HIGH SPEED ADJUST ADJUSTMENT BEND TO ADJUST SPEED DECREASE INCREASE OHH REMOTE & MANUAL OHH FIXED SPEED THROTTLE CRACK SCREW T-10 GOVERNED...
  • Page 30 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 HIGH SPEED ADJUST GOVERNED IDLE ADJUST OHV11 - 17 SPEED CONTROL OVM / OVXL GOVERNOR OVERRIDE www.mymowerparts.com...
  • Page 31 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 OHV VERTICAL CONTROL OHV 11 - 17 HORIZONTAL CONTROL www.mymowerparts.com...

  • Page 32: Starter Housing

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 ROPE STARTER HOUSING HANDLE PULLEY AND REWIND SPRING ASSY. STARTER DOG DOG SPRING WASHER RETAINER BRAKE SPRING WASHER SPRING PIN www.mymowerparts.com...
  • Page 33 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 STAPLE ONE PIECE ROPE RETAINER ROPE STARTER HOUSING HANDLE PULLEY AND REWIND SPRING ASSY. STARTER DOG DOG SPRING WASHER RETAINER LEFT-HAND BRAKE SPRING KNOT WASHER SPRING PIN www.mymowerparts.com...
  • Page 34 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 STARTER HOUSING HANDLE HANDLE INSERT ROPE PULLEY AND REWIND SPRING ASSY. SPRING WASHER STARTER DOG RETAINER BRAKE SPRING WASHER SPRING PIN STARTER HOUSING HANDLE ROPE PULLEY AND REWIND SPRING ASSY. DOG SPRING...
  • Page 35 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 STARTER HOUSING STARTER PULLEY SPRING & COVER DOG SPRING STARTER DOG DOG RETAINER STARTER HOUSING REWIND HANDLE SPRING AND KEEPER ASSY. ROPE HANDLE INSERT DOG SPRING PULLEY STARTER DOG DOG RETAINER...
  • Page 36 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 HOUSING HANDLE SPRING & KEEPER ASSY. PULLEY BRAKE SPRING DOG SPRNG RETAINER RETAINER SCREW CENTER PIN "STAMPED STEEL" STARTER HOUSING REWIND HANDLE SPRING AND KEEPER ASSY. ROPE HANDLE INSERT DOG SPRING...
  • Page 37 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 STARTER HOUSING REWIND SPRING PULLEY BRAKE SPRING STARTER DOGS STARTER DOG SPRING LEFT-HAND STARTER DOG RETAINER KNOT WASHER LOCKWASHER 6mm METRIC NUT TYPE I STARTER HOUSING SPRING AND KEEPER PULLEY STARTER DOG...
  • Page 38 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 BOLT END CAP BRUSHES WASHER BRUSH SPRINGS NUTS BRUSH CARD HOUSING ARMATURE SPRING RETAINER END CAP RETAINER ENGAGING NUT GEAR SPRING ROTATION OF FLYWHEEL www.mymowerparts.com...
  • Page 39 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CATHODE ANODE BAND OR OTHER MARKING INDICATES CATHODE END HALF WAVE RECTIFIER + VOLTAGE (SINGLE DIODE) + VOLTAGE A.C. INPUT D.C. OUTPUT - VOLTAGE - VOLTAGE FULL WAVE RECTIFIER (BRIDGE RECTIFIER)
  • Page 40 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 THE LARGER THE NUMBER THE SMALLER THE WIRE # 18 www.mymowerparts.com...
  • Page 41 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 42 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 43 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CAUTION: FOLLOW ALL SAFETY PRECAUTIONS WHEN TESTING FOR A.C. VOLTAGE, ELECTRIC SHOCK CAN KILL. www.mymowerparts.com...
  • Page 44 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 ENGINE YELLOW #4414 BULB YELLOW YELLOW A.C. GREEN IGNITION STOP YELLOW TWO DIODES D.C. D.C. NEGATIVE OUTPUT LEAD (BROWN D.C.) D.C. POSITIVE OUTPUT LEAD (RED D.C.) D.C. A.C. www.mymowerparts.com...
  • Page 45 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 DIODE GREEN D.C. SOLDERLESS SPADE CONNECTOR CONNECTOR FUSE HOLDER IF BULB DOES NOT LIGHT OR LIGHTS WHEN POLARITY REVERSED, DISCARD DIODE. www.mymowerparts.com...
  • Page 46 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 INSERT PROBES INTO CONNECTOR SLOTS. DO NOT REMOVE CONNECTOR WIRES. YELLOW NOTE: D.C. OUTPUT MUST BE DISCONNECTED TO PERFORM A.C. OUTPUT TEST. A.C. VOLTMETER CAUTION: BLOWER HOUSING MUST BE INSTALLED WHEN RUNNING ENGINE...
  • Page 47 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 DIODE YELLOW D.C. DIODE YELLOW A.C. DIODE A.C. www.mymowerparts.com...
  • Page 48 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 A.C. INSERT PROBES INTO CONNECTOR SLOTS DO NOT REMOVE CONNECTOR WIRES YELLOW CAUTION: BLOWER HOUSING MUST BE INSTALLED WHEN RUNNING ENGINE A.C. VOLTMETER www.mymowerparts.com...
  • Page 49 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 A.C. OUTPUT YELLOW D.C. OUTPUT - RED SOLENOID LIGHT SWITCH GREEN MAGNETO GROUND FUSE BATTERY AMMETER REGULATED D.C. OUTPUT YELLOW NOTE: D.C. OUTPUT MUST BE DISCONNECTED TO PERFORM A.C. OUTPUT TEST.
  • Page 50 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 FLOAT SWITCH If equipped, the indicator light will flash if the oil level is at or below the add mark and the engine is turned over while attempting to start. Test by turning the engine over with the oil level below the add mark.
  • Page 51 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 BRUSHES GASKET ARMATURE THRUST WASHER RETAINER & SPRING BENDIX ASSEMBLY RETAINING RING DUST COVER www.mymowerparts.com...
  • Page 52 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 FIELD COIL FIELD COIL CONNECTORS CONNECTORS BRUSH CONNECTION POINT OF SPRINGS POWER CORD LEADS 12 VOLT 120 VOLT www.mymowerparts.com...
  • Page 53 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 54 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 MOUNTING HOLES MECHANISM FULL DOWN BEFORE SCREWS TORQUED ELECTRIC START INTERLOCK SWITCH www.mymowerparts.com...
  • Page 55 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 MOUNTING HOLES MECHANISM FULL DOWN BEFORE SCREWS TORQUED ELECTRIC START INTERLOCK SWITCH SCREW END MUST NOT BLOCK LEVER ACTION CABLE CLAMP SCREW MOUNTING HOLES MECHANISM FULL DOWN BEFORE SCREWS TORQUED www.mymowerparts.com...
  • Page 56 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 STANDARD PLUG www.mymowerparts.com...
  • Page 57 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 MAGNETS www.mymowerparts.com...
  • Page 58 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 59 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Carbon Deposit Normal www.mymowerparts.com...
  • Page 60 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 .0125" (.3175 mm) www.mymowerparts.com...

  • Page 61: Chapter 9 Internal Engine And Cylinder

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CHAPTER 9 INTERNAL ENGINE AND CYLINDER GENERAL INFORMATION OPERATION 4-CYCLE ENGINE THEORY INTAKE COMPRESSION POWER EXHAUST www.mymowerparts.com...

  • Page 62: Lubrication Systems

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 LUBRICATION SYSTEMS The rotary pump is driven by the camshaft. It uses a lobed gear in a rotating ring to provide positive oil displacement (diag. 9). COUNTERBALANCE SYSTEMS COUNTER- BALANCE SHAFT...
  • Page 63 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 COMPONENTS cylinder block piston piston rings connecting rod cylinder head crankshaft camshaft valves valve springs valve lifters push rods rocker arms crankcase breather cylinder cover oil pump flywheel SHAFT ROTOR ROTARY PUMP RING www.mymowerparts.com...

  • Page 64: Engine Operation Problems

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 ENGINE OPERATION PROBLEMS SURGES OR RUNS UNEVENLY ENGINE KNOCKS OVERHEATS Associated equipment loose or Excessive engine loading Fuel cap vent obstructed improperly adjusted Check for excessive carbon in Low oil level or wrong viscosity oil...
  • Page 65 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 ENGINE OPERATION PROBLEMS ENGINE VIBRATES EXCESSIVELY BREATHER PASSING OIL ENGINE MISFIRES Oil level too high Carburetor improperly adjusted Bent crankshaft Excessive RPM or improper governor Wrong or fouled spark plug Attached equipment out of balance...

  • Page 66: Engine Overheats

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TESTING ENGINE KNOCKS ENGINE OVERHEATS SURGES or RUNS UNEVENLY ENGINE MISFIRES www.mymowerparts.com...

  • Page 67: Engine Vibrates Excessively

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 ENGINE VIBRATES EXCESSIVELY BREATHER PASSING OIL 2 and 4-CYCLE RPM SETTINGS NOTE: NOTE: EXCESSIVE OIL CONSUMPTION www.mymowerparts.com...

  • Page 68: Lacks Power

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 LACKS POWER SERVICE DISASSEMBLY PROCEDURE NOTE: www.mymowerparts.com...
  • Page 69 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 NOTE: ON SOME OHV ENGINES THE EXHAUST PUSH ROD CAN ONLY BE REMOVED AFTER THE HEAD IS OFF. YOU MUST HAVE IT BACK IN BEFORE RE- ASSEMBLY. www.mymowerparts.com...
  • Page 70 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 71 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CYLINDERS www.mymowerparts.com...
  • Page 72 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CYLINDER HEAD AND VALVE TRAIN SERVICE TORQUE SEQUENCE Valves, Springs, And Push Rods TORQUE SEQUENCE www.mymowerparts.com...

  • Page 73: Pistons, Rings, And Connecting Rods

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 PISTONS, RINGS, AND CONNECTING RODS Piston Piston Rings Piston Ring Orientation NOTE: www.mymowerparts.com...

  • Page 74: Connecting Rods

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CONNECTING RODS On all engine models, the match marks on the connecting rod and cap must align and face out when installing the piston assembly into the engine (diag. 33 &...
  • Page 75 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CRITICAL NOTE: Valve Seats www.mymowerparts.com...

  • Page 76: Valve Lifters

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 VALVE LIFTERS VALVE GUIDES VALVE GUIDE REMOVAL (WHERE APPLICABLE, CONSULT PARTS MANUAL) CAUTION : USE PROTECTION FOR EYES AND HANDS, BE CAREFUL ! THE HOT OIL AND HEAD CAN EASILY CAUSE BURNS.

  • Page 77: Crankcase Breathers

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CRANKCASE BREATHERS Top Mounted Breather Side Mounted Breather www.mymowerparts.com...

  • Page 78: Cylinder Cover, Oil Seal, And Bearing Service

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CYLINDER COVER, OIL SEAL, AND BEARING SERVICE Cylinder Cover Oil Seal Service NOTE: CRANKSHAFT BEARING SERVICE Ball Bearing Service www.mymowerparts.com...

  • Page 79: Engine Assembly

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 SERVICE BUSHING BUSHING SIZE CHART BUSHING SERVICE FINISHED REAM PART NUMBER BORE DIAMETER ENGINE ASSEMBLY www.mymowerparts.com...
  • Page 80 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 NOTE: Dual Balance Shaft NOTE: www.mymowerparts.com...

  • Page 81: Rotary Pump

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 SHAFT ROTOR On engines with ball bearings in the cover, install a thrust washer (if applicable) over the crankshaft, followed by the retaining ring. RING ROTARY PUMP NOTE: NOTE: INSTALL OIL PUMP AFTER THE SUMP IS ON...
  • Page 82 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 STEPS 12A -12G APPLY ONLY TO EARLY PRODUCTION ENGINE MODELS OHM, OHSK120, OVM AND OVXL. b. Install the valves into the head, and using a new head gasket, place the head on the cylinder block.
  • Page 83 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 OHH / OVRM LOCKING / ADJUSTING NUT CROWN DOWN "O" RING OR GASKET FEELER GAUGE PUSH ROD VALVE STEM ROCKER ARM GUIDE STUD TABS UP OVM / OHM / OVXL OHV 11-13 and OHV 110-135 / OHSK80-130...
  • Page 84 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 OHV135 - 175 www.mymowerparts.com...
  • Page 85 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 NOTE: www.mymowerparts.com...
  • Page 86 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 The engine specifications listed on the following pages include tolerances that are considered acceptable to achieve normal engine operation. Observed values inside the listed tolerance range are satisfactory and require no adjustments.
  • Page 87 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 88 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 89 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 . t f & ) . l l f f l f f ) . t l f f l f f l f f l f f www.mymowerparts.com...
  • Page 90 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 91 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 92 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TOOL KIT 670195E Kit contains tools for 2- and 4-cycle engines. Includes all items on this page but items may be purchased separately. www.mymowerparts.com...
  • Page 93 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 94 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...

This manual is also suitable for:

Ohhsk50 - 130Ohv11 - ohv17Ovm120Ovrm40-675Ovrm120Ovxl/c120 ... Show all

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