TOHATSU MFS 8A3 - Troubleshooting Guide

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TROUBLESHOOTING
ENOM00561-0
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 Power tilt inoperative
Possible cause
FUEL SYSTEM
 Empty fuel tank
  Incorrect connection of fuel system
  Air entering fuel line
  Deformed or damaged fuel hose
  Closed air vent on fuel tank
  Clogged fuel filter, fuel pump, or carburetor
  Use of improper engine oil
  Use of improper gasoline
 Excessive supply of fuel
  Poor carburetor adjustment
ELECTRICAL SYSTEM
  Spark plug other than specified
  Dirt, soot, etc. on spark plug
Faulty oil pressure switch
  No Spark or weak spark
 Short circuit of engine stop switch
  Ignition timing incorrect
Lock plate not fitted
Disconnection of wire or loose ground connection
 Blown 20 Amp fuse in the starting circuit
 Not shifted to neutral position

Weak battery or battery connections are loose or
corroded
Ignition key switch failure
Wiring or electrical connection faulty
 Starter motor or starter solenoid failure
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