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Identifies engine models using type and serial numbers. Covers two methods used.
Explains letter designations for engine types and following numbers for horsepower/displacement.
Identifies new short blocks by tag and importance of transferring original model numbers.
Proper procedures for storing engines for over 30 days to prevent fuel gumming.
Minor tune-up steps including air cleaner, spark plug, and carburetor checks.
Procedure for cleaning exhaust ports every 75-100 hours to remove carbon deposits.
Details piston movement, crankcase pressure, and port uncovering in piston port engines.
Describes loop scavenge design with reed valves and port locations.
Defines common terms used for 2-cycle engines like ports, reed valve, and lubrication.
Explains servicing polyurethane and paper air filters to prevent engine damage.
Detailed instructions for cleaning, drying, and re-oiling polyurethane air filter elements.
Recommends replacing paper filters annually or more often in dusty conditions.
Explains how to identify carburetors using manufacturing and code dates.
Describes float-type carburetors, including float action and fuel level maintenance.
Explains diaphragm carburetors, metering devices, and operation with intake manifold pressure.
Provides general procedures for disassembling and cleaning carburetors, including welch plugs.
Instructions for examining and reassembling throttle lever and plate, ensuring correct orientation.
Details choke lever and plate inspection, shaft, and bearing checks for wear or damage.
Describes fuel bowl cleaning, "O" ring replacement, and proper installation.
Procedure for removing float, inlet needle, and checking float hinge and tab for wear.
Explains removal and replacement of VITON® seats using a hook or pliers.
Details setting float height using an 11/64" drill bit and adjusting the float tab.
Instructions for installing primer bulb and retainer using a deep well socket.
Steps for cleaning carburetor body, checking shafts/bearings, and removing carbon.
Instructions for removing and installing fuel inlet fittings, using Loctite for secure installation.
Discusses two types of check valves (brass and teflon) and their removal/cleaning procedures.
Checking throttle shaft for binding and ensuring detent marks are properly positioned.
Inspecting choke shaft for binding and positioning the shutter opening correctly.
Illustrates float type carburetor components and service points.
Illustrates diaphragm type carburetor components and service points.
Details specific procedures for emissionized diaphragm carburetors.
Covers float type carburetors for outboards and their fuel pump elements.
Procedure for pre-setting and adjusting engine idle RPM using a screw and tachometer.
Steps for setting mixture screw and adjusting for optimal engine performance.
Instructions for adjusting mixture screws on diaphragm carburetors for proper settings.
Table of common engine problems and cross-references to specific check points.
Specific checks for float type carburetors, including float setting and angle of operation.
Procedures for checking diaphragm for cracks, distortion, and sequence of installation.
Instructions for installing fuel fittings, supporting the carburetor body, and using Loctite.
Guidance on removing and installing choke shafts, springs, and shutters for proper function.
Procedure for removing and installing throttle levers and springs on the throttle shaft.
Describes how air vane governors maintain RPM by sensing air velocity from flywheel fins.
Best methods for recording and reinstalling governor and linkage attachment points.
Types of rewind starters and how they engage the flywheel to turn the engine.
Explains the sequence of events when pulling the starter rope to engage and disengage the starter dog.
Guidance on selecting and replacing starter ropes, including conversion charts.
Procedure for removing and installing retainer staples and handles for rewind starters.
Steps to disassemble stylized rewind starters, including removing the retainer wedge and pulley.
Steps for assembling stylized rewind starters, focusing on spring installation and rope feeding.
Steps to remove the handle, spring cover, and gear/pulley assembly from the starter.
Steps for assembling the starter, including rope feeding and spring winding.
Steps to disassemble starter, remove retainer legs, pulley, and recoil housing.
Procedures for assembling the starter, including spring installation and dog alignment.
Steps to remove rope, handle, spring capsule, and sheave from the starter.
Steps for assembling the starter, including rope feeding, spring winding, and strut pinning.
Steps to release spring tension, remove clips, and lift out the pulley.
Steps for assembling the starter into the housing, including spring winding and rope feeding.
Procedures for disassembling and servicing the pinion gear parts of the electric starter drive assembly.
Detailed checks for starter brushes, field coils, and armatures.
Guides for diagnosing and resolving common starter malfunctions.
Checks for no current, faulty switches, engine lock-up, or failed starter components.
Identifies causes like parasitic load, worn brushes, or defective armatures.
Troubleshooting tips for a starter that spins but doesn't engage the engine.
Basic checks for alternators, including bulb condition, terminals, and wiring continuity.
Details the components and function of the inside edge brake pad and ignition kill switch.
Lists components of the inside edge system, including brake lever, interlock switch, and control cable.
Procedures for servicing the brake system if it fails to stop the engine and blade within 3 seconds.
Detailed steps for relieving brake pressure, removing the flywheel, and inspecting the brake pad.
Inspecting the ignition kill switch grounding clip for proper alignment and contact.
Guidance on replacing control cable conduit screws and ensuring proper cable travel.
Checking the interlock switch continuity to ensure starter engagement is safe.
Explains magneto ignition components and how magnetic fields generate spark.
Details the stator assembly, primary/secondary windings, and transformer function.
Describes the function of contact points and their role in the primary circuit.
Explains the condenser's function as an electrical shock absorber to prevent arcing.
Describes the all-electronic CDI system, its encapsulation, and energy transfer.
Explains how magnets, charge coil, capacitor, and SCR work to fire the spark plug.
Steps for cleaning, gapping, and replacing spark plugs, and troubleshooting frequent fouling.
Instructions for holding the flywheel, removing the nut, and using pullers.
How to check flywheel magnet strength using a screwdriver.
Explains the function of flywheel keys and the consequences of shearing.
Emphasizes torquing the flywheel to proper specifications.
Procedures for removing, installing, and adjusting magneto breaker points.
How to check a condenser's capacity and resistance using a tester.
Instructions for inspecting ignition coils for damage and checking their electrical leads.
Steps for setting point gap and timing the ignition system.
Describes ignition systems with external coils and stepped flywheel keys.
Identifies CDI modules by their square configuration and need for specific flywheel keys.
Covers ignition systems with non-adjustable stators and points setting.
Details applying grease to friction screw, installing stator, and cleaning points.
Steps for cleaning carbon, removing pistons, checking rings for wear and end gap.
Inspecting cylinder bore, fins, and head surface for damage or warping.
Importance of replacing gaskets and ensuring sealing surfaces are leak-free.
Checking reeds for dirt, proper sealing, and correct orientation during installation.
Explains how single reed compression release systems work during cranking and running.
Describes the function of double reed compression release systems in managing pressure.
Lists common engine failures and their remedies, categorized by symptom.
Common causes and solutions for engines that won't start or start poorly.
Identifies causes of engine knocking, such as carbon buildup or loose components.
Addresses issues causing engines to miss when under load, like fouled plugs or improper carb settings.
Troubleshooting steps for engines that lack power, including choke, gasket, and timing issues.
Identifies causes of engine overheating, such as improper timing or obstructed airflow.
Solutions for engines that surge or run unevenly, including vent holes and linkage issues.
Addresses causes of excessive engine vibration, like loose mounting or unbalanced components.
Explains Tecumseh's methods for identifying 2-cycle and 4-cycle engines using model and type numbers.
Catalog of handbooks covering diagnosis and repair of various Tecumseh engine series.
List of VHS training programs on carburetor troubleshooting, ignition systems, and transaxles.
Booklets offering specific guidance on carburetor and ignition system troubleshooting.
Identifies tools for oil seal installation and removal, including specific part numbers.
Tool used for precise measurements, often for timing or runout checks.
Tool used to safely expand piston rings for installation or removal.
Tool designed for the removal of oil seals from engine components.
Gauge used for measuring air gaps on ignition systems or other specified clearances.
General