Tecumseh ECV100 - 120 - User Manual

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
ENGINES & TRANSMISSIONS
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.

Tecumseh ECV100 - 120 Specifications

General

Governor Type	Mechanical
Ignition System	Solid state magneto
Fuel Type	Gasoline
Lubrication System	Splash
Spark Plug Gap	0.76 mm (0.030 in)
Starting System	Recoil

Summary

CHAPTER 1 GENERAL INFORMATION

ENGINE IDENTIFICATION

INTERPRETATION OF MODEL NUMBER

ENGINE OIL

CHAPTER 3 CARBURETORS AND FUEL SYSTEMS

CHAPTER 4 GOVERNORS AND LINKAGE

TROUBLESHOOTING

Addresses engine problems suspected to be caused by the governor.

ENGINE OVERSPEEDING

Procedures for diagnosing and correcting engine overspeed conditions.

GOVERNOR ADJUSTMENT

Instructions for adjusting the governor clamp on the governor lever.

CHAPTER 6 ELECTRICAL SYSTEMS

STARTING CIRCUIT AND ELECTRIC STARTERS

Explains the operation of the electric starter circuit and engagement with the flywheel.

CHARGING CIRCUIT

Describes how a current is induced in alternator coils by flywheel magnets.

TROUBLESHOOTING ELECTRICAL STARTER CIRCUIT FLOW CHART

A flowchart to diagnose problems in the electric starter circuit.

CHAPTER 7 FLYWHEEL BRAKE SYSTEMS

BOTTOM SURFACE SYSTEM

INSIDE EDGE SYSTEM

SERVICE

Service procedures for brake systems failing to stop the blade within 3 seconds.

CHAPTER 8 IGNITION

SOLID STATE IGNITION SYSTEM (CDI)

MAGNETO IGNITION SYSTEM (POINTS)

IGNITION TROUBLESHOOTING

Flowcharts for troubleshooting engine start and running issues related to ignition.

CHAPTER 9 INTERNAL ENGINE AND CYLINDER

GENERAL INFORMATION

4-CYCLE ENGINE THEORY

ENGINE OPERATION PROBLEMS

Lists common engine operation problems and their potential causes.

DISASSEMBLY PROCEDURE

CHAPTER 10 ENGINE SPECIFICATIONS

FOUR CYCLE TORQUE SPECIFICATIONS

Torque specifications for various engine components across different models.

ENGINE SPECIFICATIONS STANDARD POINT IGNITION

SOLID STATE AND EXTERNAL IGNITION