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Tecumseh HSK840 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 the following models:
TVS, TVXL, HXL, HSK 840 - 850
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
HSK/HXL840 - 850
TVS/TVXL840
2-Cycle Engines
www.mymowerparts.com

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Summary of Contents for Tecumseh HSK840

  • Page 1 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 the following models: TVS, TVXL, HXL, HSK 840 - 850 Other illustrated Tecumseh 2-Cycle Engine, 4-Cycle Engine and Transmission manuals;...

  • Page 2: Table Of Contents

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TABLE OF CONTENTS Page ENGINE IDENTIFICATION AND CARE IDENTIFICATION ........................... 1 INTERPRETATION OF MODEL NUMBER .................... 1 FUELS ..............................1 ENGINE OIL ............................1 FUEL/OIL MIX ............................1 STORAGE .............................. 2 TUNE-UP PROCEDURE ........................

  • Page 3: Engine Identification And Care

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 ENGINE IDENTIFICATION AND CARE IDENTIFICATION ENGINE OIL. 2 CYCLE OIL NMMA TC-WII, or TC-W3 FUEL/OIL MIX. NOTE: NOTE: ALWAYS DOUBLE THE AMOUNT OF OIL FOR THE FIRST GALLON OF MIX FOR ENGINE BREAK IN.

  • Page 4: Storage

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 STORAGE: NEVER STORE ENGINE WITH FUEL IN TANK INDOORS OR IN ENCLOSED, POORLY VENTILATED ENCLOSURES WHERE FUEL FUMES MAY REACH AN OPEN FLAME, SPARK OR PILOT LIGHT AS ON A FURNACE, WATER HEATER, CLOTHES DRYER, ETC.

  • Page 5: Air Cleaner

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 AIR CLEANER AIR CLEANER. NOTE: PAPER TYPE AIR CLEANER. NOTE: SNOW KING MODELS DO NOT HAVE AIR FILTERS DUE TO THE CLEAN ENVIRONMENT THEY DO NOT ATTEMPT TO CLEAN OR OIL PAPER OPERATE IN AND TO PREVENT AIR CLEANER FILTER'S.

  • Page 6: Cycle Theory Of Operation

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 2 CYCLE THEORY OF OPERATION TERMS. EXHAUST or SCAVENGE PHASE. PORTS EXHAUST PORTS. OPERATION OF HSK, HXL840-850 MODELS. THIRD PORT (Sometimes called piston port). LUBRICATION. NOTE: ALWAYS MIX AT OUR RECOMMENDED RATIO AND USE ONLY CERTIFIED OILS OR WARRANTY IS VOID.

  • Page 7: Carburetion

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CARBURETION CARBURETOR IDENTIFICATION IDLE AIR MAIN AIR BLEED BLEED CHOKE ALTERNATE LOCATION FOR SHUTTER MANUFACTURING NUMBER THROTTLE SHUTTER INLET NEEDLE AND SEAT IDLE ADJUSTMENT FLOAT MAIN NOZZLE MAIN ADJUSTMENT NOTE: EITHER JET MAY BE FIXED TYPE. (NON- ADJUSTABLE) SERIES I OPERATION.
  • Page 8 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CAUTION: www.mymowerparts.com...

  • Page 9: Servicing The Carburetor - Series Vi

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 SERVICING THE CARBURETOR - SERIES VI REBUILDING THE CARBURETOR CAUTION: NOTE: CLIP OPEN END OF CLIP LONG END OF CLIP www.mymowerparts.com...
  • Page 10 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...

  • Page 11: Troubleshooting Carburetion Series

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TROUBLESHOOTING CARBURETION SERIES VI TROUBLE CORRECTIONS www.mymowerparts.com...

  • Page 12: Servicing The Carburetor Series I

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 SERVICING THE CARBURETOR SERIES I CHOKE PLATE FLAT DOWN TWELVE O'CLOCK POSITION NOTE: www.mymowerparts.com...

  • Page 13: Service

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 SERVICE CARBURETOR PRE-SETS AND ADJUSTMENT NOTE: Pre-sets and Adjustments If Equipped. Tecumseh Carburetors Engine Model Main Pre-set Idle Pre-set All models with float-type NOTE: 1-1/2 turn 1 turn carburetors Final Adjustments...

  • Page 14: Troubleshooting Carburetion Series I

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TROUBLESHOOTING CARBURETION SERIES I TROUBLE CORRECTIONS www.mymowerparts.com...

  • Page 15: Piston And Rings

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 PISTON AND RINGS NOTE: www.mymowerparts.com...

  • Page 16: Port Plug Reinstallation

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 E.G.R. TUBE SERVICE & INSTALLATION TVS / TVXL 840 ONLY NOTE: PORT PLUG REINSTALLATION www.mymowerparts.com...

  • Page 17: Anti-Puddling Meter Hole Screen

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 ANTI-PUDDLING METER HOLE SCREEN NOTE: REPLACEMENT OF SCREEN www.mymowerparts.com...

  • Page 18: Self-Energizing Brake System

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 SELF-ENERGIZING BRAKE SYSTEM TVS/TVLX840 Models REASSEMBLY OF THE BRAKE SYSTEM. DISASSEMBLY OF THE BRAKE SYSTEM. www.mymowerparts.com...
  • Page 19 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CAUTION: www.mymowerparts.com...

  • Page 20: Governor Linkage And Adjustment

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 GOVERNOR LINKAGE, AND ADJUSTMENT GOVERNOR FOLLOWER ARM AND SHAFT ASSEMBLY. LINKAGE LOCATION. GOVERNOR SHAFT SEAL. GOVERNOR ADJUSTMENT www.mymowerparts.com...

  • Page 21: Governor Linkage And Adjustment - Hxl/Hsk840 - 850 Controls

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 GOVERNOR LINKAGE AND ADJUSTMENT HXL, HSK840 - 850 www.mymowerparts.com...

  • Page 22: Rewind Starter

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 REWIND STARTER TYPE I THIS REWIND SPRING IS NOT IN A CANISTER. TO REASSEMBLE THE REWIND STARTER: RETAINER WEDGE STARTER CAUTION: HOUSING TYPE II STARTER PULLEY SPRING & COVER DOG SPRING...

  • Page 23: 840 - 850 Disassembly

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 840 - 850 DISASSEMBLY EXHAUST PORT CLEANING MODEL 840-850 DISASSEMBLY. EXHAUST PORT CLEANING. NOTE: NOTE: www.mymowerparts.com...
  • Page 24 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 25 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 26 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 27 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 IMPORTANT: NEVER REUSE OLD NEEDLES. www.mymowerparts.com...

  • Page 28: 840 Horizontal And Vertical Reassembly

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 840 - 850 REASSEMBLY 840 HORIZONTAL AND VERTICAL REASSEMBLY. www.mymowerparts.com...
  • Page 29 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 NOTE: LOCTITE 680 MUST BE USED AROUND THE OUTSIDE FLYWHEEL END SEAL FOR RETENTION. www.mymowerparts.com...
  • Page 30 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TVS/TVXL840 ONLY NOTE: www.mymowerparts.com...
  • Page 31 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 32 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 NOTE: NOTE: www.mymowerparts.com...

  • Page 33: Torque Specifications

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TORQUE SPECIFICATIONS FOOT INCH POUNDS POUNDS NOTE: www.mymowerparts.com...

  • Page 34: Engine Specifications

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 ENGINE SPECIFICATIONS TVS840 TVXL840 HSK/HXL840-850 INCHES INCHES INCHES www.mymowerparts.com...

  • Page 35: Training Aids And Tools

    For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TRAINING AIDS AND TOOLS VIDEO PROGRAMS ELECTRICAL TROUBLESHOOTING BOOKLET 693505A CARBURETOR TROUBLESHOOTING BOOKLET 695015 695907 695059 IGNITION SYSTEMS TROUBLESHOOTING BOOKLET 694903 695148 QUICK REFERENCE CHART BOOKLET 695185 695933 695285 SPECIAL TOOLS BOOKLET...
  • Page 36 For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TOOLS TOOL KIT 670195B No. 670298 OIL SEAL PROTECTOR No. 670226 No. 670318 OIL SEAL REMOVER No. 670288 TORX DRIVERS VIBRATION TACHOMETER No. 670156 www.mymowerparts.com...

This manual is also suitable for:

Tvxl840/hxl840 - 850Hsk850Hxl840Hxl850Tvs840

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