Table of Contents
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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
Not For Resale
www.SmallEngineDiscount.com
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Table of Contents
Troubleshooting
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Summary of Contents for Tecumseh HSK840
- Page 1 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...
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Page 2: Table Of Contents
GOVERNOR LINKAGE AND ADJUSTMENT LINKAGE LOCATION ..........................18 GOVERNOR ADJUSTMENT ........................18 GOVERNOR FOLLOWER ARM AND SHAFT ASSEMBLY ..............18 GOVERNOR LINKAGE AND ADJUSTMENT - HXL/HSK840 - 850 CONTROLS ............................19 REWIND STARTER TYPE I ..............................20 TYPE II ..............................20 840 - 850 DISASSEMBLY MODEL 840-850 DISASSEMBLY ...................... -
Page 3: Engine Identification And Care
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. Interpretation of Model Number Do not mix directly in engine or equipment fuel tank. -
Page 4: Storage
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. DRAIN FUEL INTO APPROVED CONTAINER OUTDOORS, AWAY FROM OPEN FLAMES. -
Page 5: Air Cleaner
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. FREEZE UP. -
Page 6: Cycle Theory Of Operation
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. REED VALVE. -
Page 7: Carburetion
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. CARBURETOR DATE CODE MANUFACTURING... - Page 8 CAUTION: Not For Resale www.SmallEngineDiscount.com...
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Page 9: Servicing The Carburetor - Series Vi
SERVICING THE CARBURETOR - SERIES VI REBUILDING THE CARBURETOR CAUTION: NOTE: CLIP OPEN END OF CLIP LONG END OF CLIP Not For Resale www.SmallEngineDiscount.com... - Page 10 Not For Resale www.SmallEngineDiscount.com...
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Page 11: Troubleshooting Carburetion Series
TROUBLESHOOTING CARBURETION SERIES VI TROUBLE CORRECTIONS Not For Resale www.SmallEngineDiscount.com... -
Page 12: Servicing The Carburetor Series I
SERVICING THE CARBURETOR SERIES I CHOKE PLATE FLAT DOWN TWELVE O'CLOCK POSITION NOTE: Not For Resale www.SmallEngineDiscount.com... -
Page 13: Service
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 Not For Resale www.SmallEngineDiscount.com... -
Page 14: Troubleshooting Carburetion Series I
TROUBLESHOOTING CARBURETION SERIES I TROUBLE CORRECTIONS Not For Resale www.SmallEngineDiscount.com... -
Page 15: Piston And Rings
PISTON AND RINGS NOTE: Not For Resale www.SmallEngineDiscount.com... -
Page 16: Port Plug Reinstallation
E.G.R. TUBE SERVICE & INSTALLATION TVS / TVXL 840 ONLY NOTE: PORT PLUG REINSTALLATION Not For Resale www.SmallEngineDiscount.com... -
Page 17: Anti-Puddling Meter Hole Screen
ANTI-PUDDLING METER HOLE SCREEN NOTE: REPLACEMENT OF SCREEN Not For Resale www.SmallEngineDiscount.com... -
Page 18: Self-Energizing Brake System
SELF-ENERGIZING BRAKE SYSTEM TVS/TVLX840 Models REASSEMBLY OF THE BRAKE SYSTEM. DISASSEMBLY OF THE BRAKE SYSTEM. Not For Resale www.SmallEngineDiscount.com... - Page 19 CAUTION: Not For Resale www.SmallEngineDiscount.com...
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Page 20: Governor Linkage And Adjustment
GOVERNOR LINKAGE, AND ADJUSTMENT GOVERNOR FOLLOWER ARM AND SHAFT ASSEMBLY. LINKAGE LOCATION. GOVERNOR SHAFT SEAL. GOVERNOR ADJUSTMENT Not For Resale www.SmallEngineDiscount.com... -
Page 21: Governor Linkage And Adjustment - Hxl/Hsk840 - 850 Controls
GOVERNOR LINKAGE AND ADJUSTMENT HXL, HSK840 - 850 Not For Resale www.SmallEngineDiscount.com... -
Page 22: Rewind Starter
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 STARTER DOG DOG RETAINER NOTE: Not For Resale www.SmallEngineDiscount.com... -
Page 23: 840 - 850 Disassembly
840 - 850 DISASSEMBLY EXHAUST PORT CLEANING MODEL 840-850 DISASSEMBLY. EXHAUST PORT CLEANING. NOTE: NOTE: Not For Resale www.SmallEngineDiscount.com... - Page 24 Not For Resale www.SmallEngineDiscount.com...
- Page 25 Not For Resale www.SmallEngineDiscount.com...
- Page 26 Not For Resale www.SmallEngineDiscount.com...
- Page 27 IMPORTANT: NEVER REUSE OLD NEEDLES. Not For Resale www.SmallEngineDiscount.com...
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Page 28: 840 Horizontal And Vertical Reassembly
840 - 850 REASSEMBLY 840 HORIZONTAL AND VERTICAL REASSEMBLY. Not For Resale www.SmallEngineDiscount.com... - Page 29 NOTE: LOCTITE 680 MUST BE USED AROUND THE OUTSIDE FLYWHEEL END SEAL FOR RETENTION. Not For Resale www.SmallEngineDiscount.com...
- Page 30 TVS/TVXL840 ONLY NOTE: Not For Resale www.SmallEngineDiscount.com...
- Page 31 Not For Resale www.SmallEngineDiscount.com...
- Page 32 NOTE: NOTE: Not For Resale www.SmallEngineDiscount.com...
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Page 33: Torque Specifications
TORQUE SPECIFICATIONS FOOT INCH POUNDS POUNDS NOTE: Not For Resale www.SmallEngineDiscount.com... -
Page 34: Engine Specifications
ENGINE SPECIFICATIONS TVS840 TVXL840 HSK/HXL840-850 INCHES INCHES INCHES Not For Resale www.SmallEngineDiscount.com... -
Page 35: Training Aids And Tools Listing Of Special Training Aids And Tools
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 694862 SPECIAL BOOKLETS INSTRUCTIONAL GUIDE 692738 TESTER BOOKLETS 694529 4-CYCLE ENGINE FAILURE ANALYSIS 694530... - Page 36 TOOLS TOOL KIT 670195B No. 670298 OIL SEAL PROTECTOR No. 670226 No. 670318 OIL SEAL REMOVER No. 670288 TORX DRIVERS VIBRATION TACHOMETER No. 670156 Not For Resale www.SmallEngineDiscount.com...
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