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Tecumseh V70 - User Manual

Tecumseh V70
124 pages
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This manual covers engine models:
ECV100 - 120, H22 - 80, HH40 - 70, HHM80, HM70 - 100,
HMSK70 - 110, HMXL70, HS40 - 50, HSK30 - 70, HSSK40 - 50,
HT30 - 35, HXL35, LAV30 - 50, LEV80 - 120, TNT100 - 120,
TVM125 - 220, TVXL170 - 220, TVS75 - 120, TVXL105 - 115,
V40 - 80, VH40 - 70, V60 - 70, VM70 - 100
Model numbers are located on the engine shroud.
3 TO 11 HP
4-CYCLE
L-HEAD
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 V70 Specifications

General IconGeneral
BrandTecumseh
ModelV70
CategoryEngine
LanguageEnglish

Summary

Chapter 1 General Information: Engine Identification and Model Interpretation

Engine Identification and Model Number Interpretation

Locating engine identification and understanding model number designations.

Chapter 1 General Information: Short Blocks and Fuel;Oil Recommendations

Short Blocks and Fuel;Oil Recommendations

Short block identification and guidelines for fuel and oil usage.

Chapter 1 General Information: Engine Oil Service and Tune-Up

Engine Oil Service and Tune-Up Procedure

Details on oil type, replacement, and steps for a minor tune-up.

Chapter 1 General Information: Engine Storage Guidelines

Engine Storage Guidelines

Instructions for storing engines, including fuel system draining.

Chapter 2 Air Cleaners: Function, Components, and Troubleshooting

Air Cleaner Function, Components, and Troubleshooting

Explains air cleaner function, parts, and how to diagnose related engine problems.

Chapter 2 Air Cleaners: Filter Service and Disassembly

Air Filter Service and Disassembly

Procedures for servicing and disassembling air filter elements.

Chapter 3 Carburetors and Fuel Systems: Types, Identification, and Testing

Carburetor Types, Identification, and Testing

Explains carburetor types, identification methods, and initial testing steps.

Chapter 3 Carburetors and Fuel Systems: Operation and Primers

Carburetor Operation and Fuel Primers

Details carburetor operation at various speeds and the function of fuel primers.

Chapter 3 Carburetors and Fuel Systems: Fuel Pumps and Types

Fuel Pumps and Carburetor Type Explanations

Explains impulse fuel pumps and the operation of float and diaphragm carburetors.

Chapter 3 Carburetors and Fuel Systems: Component Inspection

Carburetor Components Inspection

Identifies and describes various internal carburetor components for inspection.

Chapter 3 Carburetors and Fuel Systems: Identification and Types

Carburetor Identification and Types

Procedures to identify dual system, Series 1, 3, 4, and diaphragm carburetors.

Chapter 3 Carburetors and Fuel Systems: Specific Series and Adjustments

Specific Carburetor Series Identification and Adjustments

Details on Series 6, 8, 9, 10, non-adjustable carburetors, and pre-set figures.

Chapter 3 Carburetors and Fuel Systems: Float Style Disassembly

Float Style Carburetor Disassembly

Step-by-step guide to disassemble float style carburetors.

Chapter 3 Carburetors and Fuel Systems: Float;Diaphragm Disassembly

Float Style and Diaphragm Carburetor Disassembly

Further float style disassembly steps and diaphragm carburetor disassembly.

Chapter 3 Carburetors and Fuel Systems: Float Adjustment

Diaphragm Carburetor Disassembly and Float Adjustment

Disassembly of diaphragm carburetors and float height adjustment procedures.

Chapter 3 Carburetors and Fuel Systems: Inspection and Assembly

Carburetor Inspection and Assembly Procedures

Inspection of various carburetor parts and assembly of welch plugs, shafts, and fittings.

Chapter 3 Carburetors and Fuel Systems: Assembly and Installation

Carburetor Assembly and Component Installation

Guidance on reassembling throttle/choke shafts, fuel fittings, and primer bulbs.

Chapter 3 Carburetors and Fuel Systems: Speed Adjustment and Float Installation

High;Low Speed Adjustment and Float Installation

Procedures for adjusting speed screws, main nozzle, and installing float assembly.

Chapter 3 Carburetors and Fuel Systems: Diaphragm Assembly and Fuel Bowls

Diaphragm Assembly and Fuel Bowl Procedures

Assembling diaphragm carburetors and procedures for fuel bowls and impulse pumps.

Chapter 3 Carburetors and Fuel Systems: Final Checks and Standard Parts

Carburetor Final Checks and Standard Service Parts

Pre-installation checks and information on standard service carburetors.

Chapter 3 Carburetors and Fuel Systems: Throttle and Idle Adjustment Service

Throttle Lever and Idle Speed Adjustment Screw Service

Servicing throttle lever and idle speed adjustment screw.

Chapter 4 Governors and Linkage: Operation and Troubleshooting

Governor Operation, Components, and Troubleshooting

Explains governor function, internal components, and troubleshooting governor issues.

Chapter 4 Governors and Linkage: Overspeeding, Surging, and Adjustment

Engine Overspeeding and Surging Diagnosis and Service

Troubleshooting and correcting engine overspeeding and surging, and governor adjustment.

Chapter 4 Governors and Linkage: Gear and Shaft Service

Governor Gear and Shaft Service Procedures

Procedures for replacing governor spool, gear, and shaft.

Chapter 4 Governors and Linkage: Speed Controls and Linkage

Speed Controls and Linkage Adjustment Techniques

Information on speed controls, linkage attachment, and snap-in style adjustment.

Chapter 4 Governors and Linkage: RPM Adjustments

Vertical Engine RPM Adjustments and Governed Idle Settings

Adjusting RPM on vertical engines and setting governed/non-governed idle.

Chapter 5 Rewind Starters: Overview, Operation, and Service

Rewind Starter Overview, Operation, and Service

Overview of rewind starter types, operation, components, and general service advice.

Chapter 5 Rewind Starters: Disassembly Procedures

Rewind Starter Disassembly Procedures

Disassembly procedures for stylized and stamped steel rewind starters.

Chapter 5 Rewind Starters: Assembly and Plastic Retainer Disassembly

Rewind Starter Assembly and Plastic Retainer Disassembly

Assembly of rewind starters and disassembly of plastic retainer types.

Chapter 5 Rewind Starters: Standard Starter Disassembly

Rewind Starter Assembly and Standard Starter Disassembly

Assembly of rewind starters and disassembly of standard stamped steel starters.

Chapter 5 Rewind Starters: Vertical Pull Starter Procedures

Vertical Pull Starter Disassembly and Assembly

Disassembly and assembly procedures for vertical pull starters.

Chapter 6 Electrical Systems: Overview and Circuits

Electrical System Overview, Starting and Charging Circuits

Overview of electrical systems, battery, starting, and charging circuits.

Chapter 6 Electrical Systems: AC to DC Conversion and Rectifiers

AC to DC Conversion and Rectifier Functions

Explains AC to DC conversion using diodes and rectifiers.

Chapter 6 Electrical Systems: Components, Wiring, and Wire Gauge

Electrical Components, Wiring, and Wire Gauge

Identifies components like batteries, wiring, and covers wire gauge importance.

Chapter 6 Electrical Systems: Basic Checks

Basic Electrical System Checks

Initial basic checks for electrical systems before extensive troubleshooting.

Chapter 6 Electrical Systems: Starter Troubleshooting

Starter Circuit Troubleshooting and Testing

Flow chart and testing procedures for diagnosing electrical starter circuit problems.

Chapter 6 Electrical Systems: Charging Troubleshooting

Charging Circuit Troubleshooting and Testing

Flowchart and testing procedures for diagnosing electrical charging circuit issues.

Chapter 6 Electrical Systems: Starting and Charging Testing

Starting and Charging Circuit Testing Procedures

Procedures for testing starting and charging circuits using voltmeters.

Chapter 6 Electrical Systems: Alternator System Testing

Testing Specific Alternator and Charging Systems

Tests for various alternator systems, DC adaptors, and regulator-rectifiers.

Chapter 6 Electrical Systems: Regulator and Low Oil Switch Checks

Voltage Regulator and Low Oil Shutdown Switch Checks

Checking voltage regulators and low oil shutdown switches for proper function.

Service: Electric Starter Procedures

Electric Starter Service and Inspection Procedures

Procedures for servicing and inspecting 12V/120V electric starters.

Inspection and Repair: Starter Components

Starter Inspection and Brush Card Replacement

Inspecting starter components and replacing brush cards.

Chapter 7 Flywheel Brake Systems: Overview and Operation

Flywheel Brake System Overview, Operation, and Components

Overview of brake systems, operation, and common components.

Chapter 7 Flywheel Brake Systems: Service and Removal

Flywheel Brake System Service and Removal

Service procedures for brake systems, flywheel removal, and brake lever/pad inspection.

Chapter 7 Flywheel Brake Systems: Interlock Switch and Cable

Ignition Groundout Terminal and Starter Interlock Switch

Inspecting ignition groundout terminal and checking/replacing starter interlock switch.

Chapter 7 Flywheel Brake Systems: Cable and Bracket Replacement

Control Cable and Brake Bracket Replacement

Control cable assembly and brake bracket replacement procedures.

Chapter 8 Ignition: Systems Overview and Operation

Ignition Systems Overview, Operation, and Types

Overview of solid state and magneto ignition systems and their basic functions.

Chapter 8 Ignition: Identification and Magneto Components

Ignition System Identification and Magneto Components

Identifying ignition systems and listing components of magneto ignition.

Chapter 8 Ignition: Magneto Component Function

Magneto Ignition Components and Function

Details on condenser, spark plug, points, cam, and stator plate functions.

Chapter 8 Ignition: Troubleshooting Flow Chart

Ignition Troubleshooting Flow Chart

Flow chart for diagnosing ignition system problems causing erratic running or no start.

Chapter 8 Ignition: Testing Procedures

Ignition Testing Procedures

Procedures for testing spark, spark plugs, and ignition ground leads.

Chapter 8 Ignition: Spark Plug Service and Timing

Spark Plug Service and Ignition Timing

Spark plug service, common fouling conditions, and ignition timing procedure.

Chapter 8 Ignition: Point Ignition and Fixed Timed Systems

Point Ignition and Fixed Timed System Procedures

Details on standard point ignition and fixed timed systems with external coils.

Chapter 8 Ignition: Solid State Timing and Service Tips

Solid State Ignition Timing and Service Tips

Setting solid state ignition timing and important service tips.

Chapter 9 Internal Engine and Cylinder: Overview and Theory

Engine Internal Components Overview and 4-Cycle Theory

Covers engine parts and explains the four-stroke engine cycle.

Chapter 9 Internal Engine and Cylinder: Lubrication and Counterbalance

Lubrication and Counterbalance Systems Explanation

Explains lubrication systems for horizontal/vertical engines and counterbalance systems.

Chapter 9 Internal Engine and Cylinder: Component Identification

Major Internal Engine Components Identification

Identifies and describes cylinder block, piston, rings, crankshaft, camshaft, and valves.

Engine Operation Problems: Troubleshooting

Troubleshooting Common Engine Operation Issues

Guides for diagnosing engine knocks, overheating, surging, oil consumption, misfires, vibration.

Testing Engine Operation Problems

Diagnosing and Testing Engine Performance Issues

Testing steps for engine knocks, overheating, surging, misfires, and lack of power.

Service and Disassembly Procedures: Engine Components

Engine Disassembly and Component Removal

General procedures for disassembling Tecumseh engines, including flywheel removal.

Cylinder Inspection and Service

Cylinder Bore Inspection and Re-Sizing

Checking cylinder for wear, re-sizing, and trenching features.

Cylinder Head and Piston;Ring;Rod Service

Cylinder Head Service and Piston;Ring;Rod Assembly

Checking cylinder head warpage and servicing pistons, rings, and connecting rods.

Crankshaft, Camshaft, and Valve Service

Crankshaft, Camshaft, and Valve Inspection and Service

Inspecting crankshaft, camshaft, and valves for wear and proper function.

Valve Seats, Lifters, Guides, and Breathers Service

Valve Seat, Lifter, Guide, and Breather Service

Procedures for servicing valve seats, lifters, guides, and crankcase breathers.

Cylinder Cover, Oil Seal, and Bearing Service

Cylinder Cover, Oil Seal, and Bearing Service Procedures

Inspecting cylinder cover, and servicing oil seals and crankshaft bearings.

Counterbalance and Flywheel Service

Counterbalance and Flywheel Component Service

Aligning counterbalance systems and servicing flywheel fans and magnets.

Chapter 10 Engine Specifications: Introduction

Engine Specifications Introduction and Tolerances

Introduction to engine specifications including acceptable tolerances.

Four Cycle Torque Specifications

Four Cycle Torque Specifications Table

Table listing torque specifications for various engine components.

Four Cycle Torque Specifications (Continued)

Four Cycle Torque Specifications Continuation

Continuation of torque specifications for various engine components.

Engine Specifications: Standard Point Ignition

Standard Point Ignition Specifications Table

Table of standard point ignition specifications for various engine models.

Engine Specifications: Standard Point Ignition (Continued)

Standard Point Ignition Specifications Continuation

Continuation of standard point ignition specifications for various engine models.

Solid State and External Ignition Specifications

Solid State and External Ignition Specifications Table

Table of solid state and external ignition specifications for various engine models.

Solid State and External Ignition (Continued)

Solid State and External Ignition Specifications Continuation

Continuation of solid state and external ignition specifications for various engine models.

Solid State and External Ignition (Continued)

Solid State and External Ignition Specifications Continuation

Continuation of solid state and external ignition specifications for various engine models.

Solid State and External Ignition (Continued)

Solid State and External Ignition Specifications Continuation

Continuation of solid state and external ignition specifications for various engine models.

Solid State and External Ignition (Continued)

Solid State and External Ignition Specifications Continuation

Continuation of solid state and external ignition specifications for various engine models.

Chapter 11 Educational Materials and Tools: Resources

Technicians Handbooks, Video Programs, and Special Booklets

List of handbooks, videos, and specialized booklets for engine repair.

Reference Guides, Tester Booklets, and Tools Information

Quick reference charts, tester booklets, and information on specialized tools.

Chapter 11 Educational Materials and Tools: Specialized Tools

Specialized Tools for Engine Service and Rebuilding

Information on tools like oil seal drivers, flywheel pullers, and valve servicing tools.

Decimal;Fraction Conversions

Decimal to Fraction Conversion Table

Table providing decimal to fraction conversions for measurements.

Sears Craftsman Cross Reference Charts

Craftsman to Tecumseh Part Number Cross Reference

Cross-reference list of Sears Craftsman part numbers to Tecumseh part numbers.

Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

Continues cross-references between Sears Craftsman and Tecumseh part numbers.

Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Sears Craftsman Cross Reference Charts (Continued)

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Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Sears Craftsman Cross Reference Charts (Continued)

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Sears Craftsman Cross Reference Charts (Continued)

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Sears Craftsman Cross Reference Charts (Continued)

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Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Sears Craftsman Cross Reference Charts (Continued)

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Sears Craftsman Cross Reference Charts (Continued)

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Sears Craftsman Cross Reference Charts (Continued)

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Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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Sears Craftsman Cross Reference Charts (Continued)

Craftsman to Tecumseh Part Number Cross Reference (Cont.)

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