Poor Performance - Mercury 496 MAG Bravo Owner's Manual

CC1044
Engine Runs Rough, Misses And/Or Backfires
Possible Cause
Idle speed too low.
Faulty ignition system component.
Clogged fuel filters.
Stale or contaminated fuel.
Kinked or clogged fuel line or fuel tank vent line.
Flame Arrestor plugged with foreign material.
EFI System fault.
CC1045

Poor Performance

Possible Cause
Throttle not fully open.
Damaged or improper propeller.
Excessive bilge water.
Boat overloaded or load improperly distributed.
Boat bottom fouled or damaged.
Flame Arrestor dirty.
EFI System fault.
Remedy
Have EFI system checked by an Authorized
MerCruiser Dealer.
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.
Clean Flame Arrestor.
Have EFI System checked by an Authorized
MerCruiser Dealer.
Remedy
Inspect throttle cable and linkages for proper
operation.
Replace propeller
Drain and check for cause of entry.
Reduce load or redistribute load more evenly.
Clean or repair as necessary.
Clean Flame Arrestor.
Have EFI System checked by an Authorized
MerCruiser Dealer.
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