TROUBLESHOOTING
SECTION 7
Page 99CMD-4081877 / 90-865861040 MARCH 2004
Engine Will Not Start, Or Is Hard To Start
Possible Cause Remedy
Lanyard stop switch activated. Check lanyard stop switch.
Improper starting procedure. Read starting procedure.
Empty fuel tank or fuel shut off valve
closed.
Fill tank or open valve.
Faulty mechanical fuel delivery pump. Have pump replaced by an authorized
Cummins MerCruiser Diesel dealer /
distributor, if fuel is present.
Throttle not operating properly. Check throttle for freedom of movement.
Faulty electrical stop-circuit Have an authorized Cummins MerCruiser
Diesel dealer / distributor service the
electrical stop circuit.
Clogged fuel filters. Replace filters.
Stale or contaminated fuel. Drain tank. Fill with fresh fuel.
Fuel line or tank vent line kinked or
clogged.
Replace kinked lines or blow out lines with
compressed air to remove obstruction.
Air in fuel injection system Purge fuel injection system
Faulty wire connections. Check wire connections.
Glow plugs or glow plug system
inoperative, if so equipped
Have an authorized Cummins MerCruiser
Diesel dealer / distributor service the glow
plug system.
Electronic fuel system fault. Have the electronic fuel system checked
by an authorized Cummins MerCruiser
Diesel dealer / distributor.
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