TOHATSU MFS 25D Owner's Manual page 93

* Low speed ESG operates.
* *
* *
* *
TROUBLESHOOTING
Possible cause
Low compression
Valve timing is not correct (Belt is stretched
or installed incorrectly).
Valve clearance is defective.
Valve seat sealing is defective.
Piston, piston ring and/or cylinder is worn
excessively.
Too much carbon deposition in the
combustion chamber.
Spark plug tightening is loose.
Cooling water is lacking (water pump is
*
defective or clogged).
* Thermostat operation is defective.
* Anti-ventilation plate is damaged.
Mismatched propeller.
Propeller is damaged or deformed.
Thrust rod position is incorrect.
Boat is unbalanced by load position.
Transom installation height is too high or too
low.
Improper trottle link adjustment.
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