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Need help?Do you have a question about the Tecumseh TVM125 and is the answer not in the manual?
Details on locating and interpreting engine model, serial numbers, and date of manufacture.
Information on identifying and transferring model numbers to new short blocks.
Recommends unleaded gasoline and discusses reformulated/oxygenated fuels.
Details on oil type, capacity, and recommended viscosity for different temperatures.
Outlines basic tune-up steps for engine maintenance and performance.
Provides instructions for proper engine storage to prevent fuel issues and maintain condition.
Explains the function of air cleaners in removing dust and dirt from engine intake air.
Lists and describes the parts of the air cleaner assembly, including covers, elements, and screens.
Guides on diagnosing engine issues caused by a dirty or restricted air cleaner.
Details service procedures for polyurethane and paper air filter elements.
Introduces float and diaphragm carburetors and their basic functions and differences.
Explains carburetor operation at different engine speeds (choke, idle, intermediate, high speed).
Describes the function, types, and operation of fuel primers and impulse fuel pumps.
Details the operation of float-style and diaphragm carburetors.
Illustrates and labels various components of a carburetor.
Provides simple procedures to identify different types of Tecumseh carburetors by series.
Provides steps for testing engine and carburetor issues before service.
Covers carburetor pre-sets, adjustments, and general service procedures.
Step-by-step instructions for disassembling float style carburetors.
Step-by-step instructions for disassembling diaphragm carburetors.
Step-by-step instructions for assembling carburetor components.
Introduces governor assembly and linkage for speed control.
Guides on diagnosing engine problems suspected to be related to the governor.
Procedures for diagnosing and correcting engine overspeed and surging conditions.
Describes the procedure for adjusting the governor lever and clamp.
Details service procedures for governor gears and shafts.
Explains the adjustment of speed controls and linkage.
Guides on setting governed and non-governed idle RPM and adjusting the idle speed screw.
Introduces rewind starters used on vertical and horizontal shaft engines.
Identifies and illustrates starter components and outlines service procedures.
Provides guidance on selecting and replacing starter ropes.
Step-by-step instructions for disassembling and reassembling various rewind starter types.
Details disassembly and assembly procedures for vertical pull starters.
Explains the three main elements of an electrical system: battery, starting, and charging circuits.
Describes the operation of the starting circuit and electric starters.
Explains how current is induced in alternator coils and converted to DC.
Explains how AC is converted to DC using diodes or rectifiers for charging.
Lists and describes battery and wiring components in electrical systems.
Lists basic checks to perform before extensive electrical system diagnostics.
Flow chart for diagnosing starter circuit issues when the engine will not turn.
Initial steps and guides for troubleshooting charging system issues.
Details testing procedures for starting and charging circuits.
Describes testing procedures for various AC and DC alternator systems.
Introduces Tecumseh's brake systems for meeting compliance standards.
Explains the operation of the bottom surface system for flywheel brakes.
Describes the operation of the inside edge system for flywheel brakes.
Lists and describes common components used in both bottom surface and inside edge brake systems.
Provides service procedures if the flywheel brake system fails to stop the blade or kill ignition.
Explains how to check and replace starter interlock switches and adjust control cables.
Instructions for replacing the brake bracket assembly.
Introduces solid state capacitor discharge and magneto ignition systems.
Illustrates and identifies different Tecumseh ignition systems and components.
Flow charts for diagnosing ignition issues when the engine will not start or runs erratically.
Outlines procedures for testing ignition systems for spark and component condition.
Covers spark plug service, timing procedure, and common fouling causes.
Explains standard point ignition systems used on small and medium frame engines.
Describes fixed timed systems and how to set solid state ignition timing.
Discusses other solid state ignition systems and provides service tips.
Covers cylinder block, piston, crankshaft, camshaft, valves, and lubrication systems.
Explains the four-stroke engine cycle theory (intake, compression, power, exhaust).
Details lubrication systems for horizontal and vertical shaft engines.
Explains the Ultra-Balance counterbalance system for engine balance.
Illustrates and describes engine components like cylinder block, piston, rings, and crankshaft.
Lists causes and checks for common engine operation problems.
Outlines testing procedures for various engine operation problems.
Step-by-step instructions for disassembling the engine.
Procedures for checking, measuring, and re-sizing cylinder bores.
Instructions for checking cylinder heads, pistons, rings, and connecting rods.
Procedures for inspecting crankshafts and camshafts for wear and timing.
Procedures for checking valve clearance, sealing, wear, and installation.
Instructions for servicing valve seats, lifters, and guides.
Instructions for cleaning and installing crankcase breathers.
Covers cylinder cover inspection, oil seal, and bearing service.
Procedures for removing and installing oil seals and servicing crankshaft bearings.
Explains counterbalance alignment and flywheel fan/magnet service.
Lists torque specifications for various engine components across different models.
Table of specifications for standard point ignition models like LAV, H, ECV.
Table of specifications for solid state and external ignition systems.
Lists available technician handbooks for diagnosing and repairing engines.
Lists available technician handbooks in Spanish, German, and French.
Lists available video programs on carburetor troubleshooting and ignition systems.
Lists special booklets on failure analysis, carburetor troubleshooting, and ignition systems.
Lists various specialized tools and gauges for engine service.
Provides a table for converting decimal measurements to fractions.
Lists cross-references between Craftsman and Tecumseh part numbers.
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