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Tecumseh AH600 - User Manual

Tecumseh AH600
68 pages
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This manual covers the following basic type or model
numbers dependent on age of product: AH520, AH600,
AV520, AV600, HSK600, TVS600.
This manual covered many engines under an Old form of
Identification which will need to be reviewed as well.
TYPE / SPECIFICATION NUMBER 638-670 1398-1642 and
Craftsman 200 Series Models.
2-CYCLE
ENGINES
T E C H N I C I A N ' S H A N D B O O K
TECUMSEH

Table of Contents

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Tecumseh AH600 Specifications

General IconGeneral
Fuel TypeGasoline
Cooling SystemAir-cooled
Starting SystemRecoil starter
Oil Capacity0.6 liters
CarburetorFloat-type

Summary

GENERAL INFORMATION

ENGINE IDENTIFICATION AND MODEL INTERPRETATION

Methods for identifying engines and interpreting model numbers.

ENGINE CARE

SHORT BLOCKS, FUEL;OIL MIX, AND STORAGE

Covers short block identification, fuel/oil ratios, and storage procedures.

TUNE-UP AND EXHAUST PORT CLEANING

TUNE-UP PROCEDURE

Steps for performing a minor engine tune-up.

EXHAUST PORT CLEANING

Procedure for cleaning exhaust ports and compression release passage.

2-CYCLE THEORY OF OPERATION

ENGINE OPERATION STYLES, TERMS, AND LUBRICATION

Explains piston port, reed port styles, terms, and lubrication.

AIR CLEANERS AND RELATED SYSTEMS

AIR CLEANER SERVICE AND KLEEN-AIRE SYSTEM

Servicing air cleaners and the Kleen-Aire system.

CARBURETOR INFORMATION AND TYPES

CARBURETOR IDENTIFICATION AND TYPES

Identification and types of float-type and diaphragm carburetors.

CARBURETOR OPERATION AND SERVICE

CARBURETOR SERVICE PROCEDURES

Disassembly, cleaning, and component replacement.

CARBURETOR COMPONENTS

CHOKE, FUEL BOWL, AND FLOAT SERVICE

Servicing choke, fuel bowl, float, and related parts.

INLET NEEDLE AND SEAT SERVICE

FLOAT CARBURETOR NEEDLE;SEAT TESTS AND SETTINGS

Pop-off tests and float height adjustments.

CARBURETOR COMPONENTS AND DIAPHRAGMS

PRIMER BULB AND DIAPHRAGM SERVICE

Installing primer bulb and inspecting diaphragms.

FUEL FITTING AND CHECK VALVE

FUEL INLET FITTING AND CHECK VALVE PROCEDURES

Installing fittings and servicing check valves.

CARBURETOR SERVICE PROCEDURES

THROTTLE SHAFT, MAIN NOZZLE, AND FLOAT BOWL SERVICE

Service for throttle, nozzle, and float bowl components.

EMISSIONIZED DIAPHRAGM CARBURETION

AIR BLEEDS AND INLET SEAT SERVICE

Servicing air bleeds and inlet seats.

OUTBOARD CARBURETORS

FUEL PUMP ELEMENT REPLACEMENT

Replacing the fuel pump element on outboard carburetors.

OUTBOARD CONTROL PANEL AND LINKAGE

THROTTLE AND IDLE ADJUSTMENT LINKAGE

Adjusting throttle lever post and idle adjustment cable.

CARBURETOR ADJUSTMENTS

IDLE SPEED AND MIXTURE ADJUSTMENTS

Adjusting idle speed and mixture on various carburetors.

CARBURETOR TROUBLESHOOTING

MALFUNCTION CHECKS AND FLOAT;DIAPHRAGM CHECKS

Common problems and specific checks for carburetors.

STANDARD SERVICE CARBURETORS

FUEL FITTING, CHOKE SHAFT, AND THROTTLE LEVER SERVICE

Service for fittings, choke, and throttle components.

GOVERNORS AND LINKAGE

AIR VANE GOVERNOR OPERATION AND LINKAGE

Operation and installation of air vane governors.

ENGINE SPEED ADJUSTMENT

HORIZONTAL AND VERTICAL ENGINE ADJUSTMENTS

Adjusting RPM on different engine configurations.

STARTER SYSTEMS OVERVIEW

REWIND STARTER SERVICE AND ROPE REPLACEMENT

General info, operation, and rope service for rewind starters.

STYLIZED REWIND STARTER WITH PLASTIC RETAINER

DISASSEMBLY AND ASSEMBLY PROCEDURES

Steps for taking apart and putting back together the starter.

VERTICAL PULL STARTER SYSTEMS

HORIZONTAL AND VERTICAL ENGAGEMENT STARTER PROCEDURES

Disassembly and assembly for pull starters.

STYLIZED REWIND STARTER ASSEMBLY

ASSEMBLY WITH PLASTIC RETAINER

Reassembly steps for stylized rewind starter.

VERTICAL PULL STARTER, VERTICAL ENGAGEMENT TYPE

DISASSEMBLY AND ASSEMBLY

Procedures for disassembling and assembling vertical pull starters.

REWIND STARTER MOUNTED IN HOUSING

DISASSEMBLY AND ASSEMBLY PROCEDURES

Steps for servicing rewind starters in housing.

ELECTRIC STARTERS

DRIVE ASSEMBLY SERVICE

Procedures for servicing the drive assembly of electric starters.

STARTER CHECKING AND SERVICE

BRUSH, FIELD, AND ARMATURE CHECKS

Inspecting starter brushes, field, and armature.

ALTERNATORS AND SYSTEM CHECKS

ALTERNATOR SYSTEM CHECKS

Basic checks for alternator system issues.

FLYWHEEL BRAKE SYSTEMS

COMPONENTS AND SERVICE PROCEDURES

Lists components and service steps for brake systems.

INSIDE EDGE BRAKE SYSTEM DETAILS

CONTROL CABLE AND INTERLOCK SWITCH

Adjusting control cable and servicing interlock switch.

IGNITION SYSTEMS OVERVIEW

MAGNETO IGNITION AND COMPONENTS

Description of magneto ignition, points, and condenser.

SOLID STATE IGNITION

SOLID STATE IGNITION OPERATION

How solid state ignition systems operate.

IGNITION SERVICE PROCEDURES

SPARK PLUG, FLYWHEEL, AND MAGNET SERVICE

Spark plug, flywheel removal, and magnet checks.

FLYWHEEL KEYS AND IGNITION TIMING

FLYWHEEL KEY;SLEEVE AND BREAKER POINT REPLACEMENT

Service for flywheel keys, sleeves, and breaker points.

CONDENSER, COIL, AND IGNITION TIMING

Checks for condenser, coil, and setting ignition timing.

SPECIFIC IGNITION SYSTEMS

FIXED TIME, SOLID STATE (CDI), AND OTHER SYSTEMS

Descriptions of various ignition system types.

OUTBOARD TIMING (STANDARD IGNITION)

ADJUSTING IGNITION POINTS

Procedure for adjusting ignition points on standard ignition outboards.

OUTBOARD TIMING (SOLID STATE)

USING TIMING TOOLS AND ADJUSTING CAM

Procedures for timing solid state outboards.

CYLINDERS AND INTERNAL COMPONENTS

PISTON AND RING SERVICE

Procedures for servicing pistons and rings.

CONNECTING ROD SERVICE

CONNECTING ROD AND NEEDLE BEARING SERVICE

Service for connecting rods and needle bearings.

CRANKSHAFT, BEARINGS, AND OIL SEALS

CRANKSHAFT, BALL AND NEEDLE BEARING SERVICE

Service for crankshafts, ball bearings, and needle bearings.

OIL SEAL SERVICE

Importance, types, and service of oil seals.

THREE PIECE SEALS AND OUTBOARD SEALS

THREE PIECE SEAL REMOVAL AND OUTBOARD SEAL SERVICE

Procedures for removing seals and outboard seal installation.

CYLINDERS, REEDS, AND COMPRESSION RELEASE

CYLINDER, HEAD, GASKET, AND REED VALVE SERVICE

Procedures for cylinder, head, gasket, and reed valve service.

COMPRESSION RELEASE OPERATION

Operation of single and double reed compression release systems.

CYLINDER EXHAUST PORTS AND CARBON CLEANING

EXHAUST PORT CLEANING PROCEDURE

Steps for cleaning cylinder exhaust ports and carbon.

TROUBLESHOOTING CHART

ENGINE FAILS TO START OR STARTS WITH DIFFICULTY

Diagnosis and remedies for starting issues.

ENGINE TROUBLESHOOTING (CONTINUED)

ENGINE MISSES, LACKS POWER, AND OVERHEATS

Troubleshooting for engine misses, power loss, and overheating.

ENGINE SURGES;UNEVEN RUNNING AND VIBRATION

Troubleshooting surging and excessive vibration.

SPECIFICATIONS AND REFERENCES

ENGINE TYPE NUMBER AND LETTER REFERENCE

Guide to engine model and type number identification.

SEARS CRAFTSMAN CROSS REFERENCE

VERTICAL AND HORIZONTAL CRANKSHAFT ENGINE CROSS REFERENCES

Cross-referencing Craftsman engine numbers.

TABLE OF TORQUE LIMITS

TORQUE SPECIFICATIONS FOR ENGINE COMPONENTS

Torque values for various engine parts like cylinder, flywheel, rods.

EDUCATIONAL MATERIALS AND TOOLS

TECHNICIANS HANDBOOKS, VIDEO PROGRAMS, AND BOOKLETS

Resources for technicians including handbooks, videos, and booklets.

TOOL KIT 670195 D

CONTENTS OF TOOL KIT 670195 D

Illustration and listing of tools in the 670195D kit.

SPECIALTY TOOLS

DESCRIPTIONS OF VARIOUS SPECIALTY TOOLS

Descriptions for oil seal drivers, dial indicator, tachometer, etc.

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