Troubleshooting - TOHATSU 40 Service Manual

TROUBLESHOOTING

The troubleshooting chart lists common engine symptoms related
to problems with the powerhead. It also indicates specific
component failures which may be causing the problem so it can be
isolated more effectively.
Checks
Poor crankcase seal
Ignition timing or throttle linkage out of
adjustment, see Section 2
Water entering lower crankcase
Defective thermostat
Fouled, defective or incorrect spark
plug; wrong gap setting
Worn or defective cylinder, piston, rings
or warped head
Blown cylinder head or engine base
gasket
Worn connecting rod or crankshaft
bearings, internal wear limits out of
specification
Defective ignition components, see
Section 7
Carbon accumulation in combustion
chamber
3-/ 4-Cylinder
Symptom
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POWERHEAD
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