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General| Fuel Type | Gasoline |
|---|---|
| Starting System | Recoil |
| Displacement | 139 cc |
| Oil Capacity | 0.6 liters |
| Ignition System | Solid State |
| Fuel Tank Capacity | 1.5 liters |
| Engine Type | 4-Cycle, OHV |
Details where engine model, specification, and serial number are stamped.
Explains how letter designations in a model number indicate the engine type.
Recommends fresh, clean, unleaded gasoline and warns against specific fuel types.
Specifies using clean, high-quality 2-cycle oil.
Details the recommended fuel/oil mix ratio and preparation for engine break-in.
Provides guidelines for storing engines safely, especially regarding fuel and ventilation.
Outlines a minor tune-up procedure, noting it's not a full repair guide.
Describes the frequency and method for cleaning exhaust ports on engines.
General advice on servicing air cleaners to prevent engine damage.
Instructions for cleaning and re-oiling polyurethane air filter elements.
Guidance on replacing paper air filters; do not clean or oil.
Details servicing a dual-stage air cleaner with paper and polyurethane elements.
Explains the operating principle of HSK/HXL 840-850 engines.
Describes the loop scavenge system with a reed valve in TVS/TVXL840 models.
Defines common terms used when discussing 2-cycle engines.
Explains the process of clearing burned gases and replacing them with fresh charge.
Defines ports as openings in the cylinder controlled by piston movement.
Specifies that exhaust ports allow burned gases to exit the combustion chamber.
Describes the third port's function in fuel-air mixture entry to the crankcase.
Explains how Tecumseh 2-cycle engines are lubricated via fuel/oil mix.
Details how a reed valve operates based on crankcase pressure or vacuum.
Explains how to identify carburetors by model and date code stamped on the body.
Describes Series I carburetors used on HSK/HXL models, including fixed and variable speed types.
Details Series VI carburetors, noting primer, fixed circuits, and starting mixture.
Step-by-step procedure for servicing the Series VI carburetor.
Instructions for replacing the seat and setting the float in the carburetor.
Table of common problems and their corresponding corrections for Series VI carburetors.
Covers variations from Series VI carburetors for Series I servicing.
Procedure for turning mixture screws finger-tight and backing them out to pre-set positions.
Steps for adjusting main and idle mixture screws after the engine warms up.
Table of common problems and their corresponding corrections for Series I carburetors.
Describes standard and half keystone piston ring types and their installation.
Instructions for installing and servicing the Exhaust Gas Recirculation tube.
Procedure for reinstalling a port plug, including cleaning and staking.
Details the screen in the anti-puddling meter hole on TVS/TVXL840 engines.
Procedure for removing and reinstalling a clogged anti-puddling meter hole screen.
Steps for disconnecting and removing components of the self-energizing brake system.
Procedure for reassembling the brake system components, including springs and levers.
Guidance on marking governor linkage locations for proper reassembly.
Instructions for servicing the governor follower arm and shaft assembly.
Details on replacing the governor shaft seal and precautions.
Steps to adjust the governor by moving the throttle and turning the shaft.
Diagram showing fixed speed governor linkage hookups on HSK and HXL models.
Illustration showing how to adjust RPM on fixed speed models by bending a tab.
Details adjustments for variable speed control on HXL840-850 Series models.
Disassembly and reassembly steps for the Type I rewind starter.
Steps for servicing starters that use a new wedge and post system.
Steps to disconnect the high tension lead and remove the spark plug and muffler.
Procedure for cleaning exhaust ports after specific operating hours.
Steps for applying cleaning solvent and reassembling cylinder and crankcase.
Instruction for placing fiber washers during carburetor attachment.
Guidance on assembling the carburetor with the bowl facing the PTO end.
Procedure to ensure proper sealing of intake elbow by replacing O-rings.
List of available video programs for engine training.
List of special booklets for technical assistance and analysis.
List of tester booklets for electrical component testing.
Kit contains tools for 2 and 4 cycle engines.
Tool for protecting PTO end oil seal during installation.
Tool for removing oil seals.
Tool for measuring engine vibration.
List of Torx drivers with associated part numbers.
