TOHATSU MFS 4C User Manual

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TROUBLESHOOTING
ENOM00436-0
If you encounter a problem, consult the check list below to determine the cause and to
take the proper action.
An authorized dealer will always be happy to provide any assistance and information.
Engine failing 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
FUEL SYSTEM
zz Empty fuel tank
zzzz zzz Incorrect connection of fuel system
zzzz zzz Air entering fuel line
zzzz zzz Deformed or damaged fuel hose
zzzz zzz Closed air vent on fuel tank
zzzz zzz Clogged fuel filter, fuel pump, or carburetor
zz zzz Use of improper engine oil
zzzz zz Use of improper gasoline
zzzz Excessive supply of fuel
zzzz zzz Poor carburetor adjustment
ELECTRICAL SYSTEM
zzzz zzz Spark plug other than specified
zzzz zz Dirt, soot, etc. on spark plug
zzzz zz No Spark or weak spark
z Short circuit of engine stop switch
zzz zzIgnition timing incorrect
z Lock plate not fitted
z Disconnection of wire or loose ground connection
COMPRESSION
&
OIL SYSTEM
zzz zz Low compression
zzCarbon deposits in the combustion chamber
zzIncorrect valve clearance
z Low oil pressure/level
ENGINE OIL
SYSTEM
zzzLow oil level
zzUse of improper oil
zzzOil deterioration
zzzClogged oil strainer
zzzFaulty oil pump

TOHATSU MFS 4C Specifications

General

Brand	TOHATSU
Model	MFS 4C
Category	Outboard Motor
Language	English