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Mercury 350 MAG MPI User Manual

Mercury 350 MAG MPI
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60
CA445
Engine Runs Rough, Misses And/Or Backfires
Possible Cause Remedy
Idle speed too low.
EFI Models: Have EFI system checked by an
Authorized MerCruiser Dealer.
Choke not operating properly.
Carburetor Models: Check choke linkages for
binding or an obstruction.
Ignition System Fault. Service ignition system.
Clogged fuel filter. Replace filter.
Stale or contaminated fuel. If contaminated, drain tank. Fill with fresh fuel.
Kinked or clogged fuel line or fuel tank vent line.
Replace kinked lines or blow out lines with
compressed air to remove obstruction.
Flame Arrestor plugged with foreign material. Clean Flame Arrestor.
EFI System Fault (If So Equipped). Have EFI System checked by an Authorized
MerCruiser Dealer.
CA446
Poor Performance
Possible Cause Remedy
Throttle not fully open.
Inspect throttle cable and linkages for proper
operation.
Damaged or improper propeller. Replace propeller.
Excessive bilge water. Drain and check for cause of entry.
Boat overloaded or load improperly distributed. Reduce load or redistribute load more evenly.
Boat bottom fouled or damaged. Clean or repair as necessary.
Flame Arrestor dirty. Clean Flame Arrestor.
EFI System Fault (If So Equipped). Have EFI System checked by an Authorized
MerCruiser Dealer.

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Mercury 350 MAG MPI Specifications

General IconGeneral
Engine TypeV8
Horsepower300 HP
IgnitionElectronic
Alternator65 amp
Cylinders8
Displacement5.7 L
Fuel SystemMulti-Port Fuel Injection (MPI)
EmissionsEPA Certified

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