Troubleshooting - Mercury 350 Mag MPI Manual

CA442
Starter Motor Will Not Crank Engine, Or Cranks Slow
Possible Cause
Battery switch turned off.
Remote control not in neutral position.
Open circuit breaker or blown fuse.
Loose or dirty electrical connections or damaged
wiring.
Bad battery.
CA443
Engine Will Not Start Or Is Hard To Start
Possible Cause
Improper starting procedure.
Empty fuel tank or fuel shutoff valve closed.
Choke not operating properly.
Engine flooded.
Faulty ignition system component.
Clogged fuel filters.
Stale or contaminated fuel.
Fuel line or tank vent line kinked or clogged.
EFI System Fault (If So Equipped).

Troubleshooting

Turn switch on.
Position control lever in neutral.
Check and reset circuit breaker or replace fuse.
Check all electrical connections and wires
(especially battery cables). Clean and tighten faulty
connection.
Test and replace if bad.
Read starting procedure.
Fill tank or open valve.
Carburetor Models: Check choke linkages for
freedom of movement.
Do not attempt to start engine for at least 5 minutes.
Refer to Starting Procedures.
Service ignition system.
Replace filters.
If contaminated, drain tank. Fill with fresh fuel.
Replace kinked lines or blow out lines with
compressed air to remove obstruction.
Have EFI System checked by an Authorized
MerCruiser Dealer.
Remedy
Remedy
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