ENGINE & STERN DRIVE
DIAGNOSTIC CHART
Problem Possible Cause
Battery switch turned off
Battery is weak
Fuses are blown on the engine
Bad ignition relay / ignition switch
Engine Cranks But Will Not Start Fuel tank vent obstructed
Low battery level
Inadequate fuel level
Inadequate fuel pump pressure
Fuel tank vent blocked
Water in fuel
Spark plugs have a bad gap
Distributor malfunction
Hard Starting Flooded Engine
Fuel lines obstructed
Water in fuel
Debris in fuel - bad fuel fi lter
Engine Runs Rough Bad fuel quality
Inadequate fuel pump pressure
Water or debris in fuel
8-3
Troubleshooting
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