TOHATSU MFS 4B User Manual

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TROUBLESHOOTING
Engine falling to start Engine starting but stopping soon Poor idling Poor acceleration Engine speed abnormally high Engine speed abnormally low Boat speed low Overheating of engine Warning lamp ON
Possible cause
COMPRESSION
& OIL SYSTEM
● ● ● ● ●
Low compression
● ●
Carbon deposits in the combustion chamber
● ●
Incorrect valve clearance
●
Low oil pressure/level
ENGINE OIL SYSTEM
● ● ●
Low oil level
● ●
Use of improper oil
● ● ●
Oil deterioration
● ● ●
Clogged oil strainer
● ● ●
Faulty oil pump
OTHERS
● ● ● ● ●
Incorrect adjustment of throttle link
● ●
Insufficient cooling water flow, clogged or defective pump
● ● ●
Faulty thermostat
● ● ● ●
Cavitation or ventilation
● ● ● ● ●
Incorrect propeller selection
● ● ● ● ● ●
Damaged or bent propeller
● ● ● ●
Improper thrust rod position
● ● ● ● ●
Unbalanced load on boat
● ● ● ● ●
Transom too high or too low

TOHATSU MFS 4B Specifications

General

Brand	TOHATSU
Model	MFS 4B
Category	Outboard Motor
Language	English