Poor Performance - Mercury Ski User Manual

CA445
Engine Runs Rough, Misses And/Or Backfires
Possible Cause
Idle speed too low
Choke not operating properly.
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 (If So Equipped).
CA446

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 (If So Equipped).
50
Remedy
EFI Models: Have EFI system checked by an
Authorized MerCruiser Dealer.
Carburetor Models: Check choke linkages for
binding or an obstruction.
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.
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.