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Yamaha EK40G User Manual

Yamaha EK40G
200 pages
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EK40J
SERVICE MANUAL
6H9-28197-5G-11
EK40G
A4Cover6H9 04.7.6 9:31 Page 1

Table of Contents

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Yamaha EK40G Specifications

General IconGeneral
Engine Type2-Stroke
Cylinder(s)1
Fuel Induction SystemCarburetor
Starting SystemManual
Ignition SystemCDI
Full Throttle RPM Range4, 500 - 5, 500 rpm
Lubrication SystemPremix
Gear Ratio2.08:1
Shaft LengthS
Gear ShiftForward, Neutral

Summary

General Information

Safety While Working

Essential safety procedures to prevent accidents and injury.

Predelivery Checks

Essential checks before delivery for smooth operation.

Specifications

Tightening Torques

Specified and general torque values for various fasteners.

Periodic Checks and Adjustments

Control System Adjustments

Adjustments for start-in-gear protection, throttle, and shift operations.

Fuel System

Carburetor Service

Procedures for disassembling, checking, and assembling the carburetor.

Power Unit

Lower Unit

Electrical Systems

Ignition System Service

Checks and troubleshooting for spark gap, ignition coil, CDI, pulser, charge coil, and thermoswitch.

Starting System Service

Procedures for checking fuses, starter relay, and starter motor operation.

Charging System Service

Procedures for checking rectifier and lighting coil performance.

Troubleshooting

Power Unit Troubleshooting

Diagnostic charts for ignition, fuel, and compression issues.

Lower Unit Troubleshooting

Diagnostic chart for forward and reverse gear shift mechanism issues.

Electrical System Troubleshooting

Diagnostic charts for starter motor and battery issues.

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