Engine overheating Cooling water seacock closed
Seacock pickup blocked
Collapsed water pump suction hose
Open seacock.
Remove obstruction.
Replace hose.
Sudden increase in Cooling water intake system blocked Clean seacock strainer.
Engine temperature Water intake hose leaking or rup-
tured
Remove material blocking line.
Water pump failure See your dealer for service.
Drop in oil pressure
(engine running at constant speed)
Lubrication system leaking
Defective oil pump
Pinched oil lines to remote filters
Repair if possible. See your dealer
for service.
See your dealer for service.
Reroute if possible. See your dealer
for service.
Excessive vibration Loose engine mounting bolts
Engine not timed properly or misfir-
ing
Engine-to-shaft couplings out-of-
round or off-center
Engine misaligned
Worn strut or transmission
Inspect and tighten as required.
See your dealer for service.
See your dealer for service.
See your dealer for service.
Replace bearings if needed.
See your dealer for service.
Poor performance Boat overloaded
Weight poorly distributed
Excess bilge water
Damaged or incorrect propeller
Fouled or damaged hull bottom
Engine misaligned
Reduce load.
Distribute weight evenly. Trimming
may help.
Pump out water. Check for leaks.
Inspect propeller. Replace if neces-
sary.
Inspect, clean, or repair.
See your dealer.
Low cranking speed Loose or dirty electrical connections
Low battery charge
Defective battery
Engine oil too heavy for prevailing
temperatures
Check all related electrical connec-
tions and wires.
Charge battery.
Replace battery.
Drain oil and refill with correct grade
viscosity oil. See engine manual for
correct grade and viscosity.
Poor acceleration Throttle not full open
Engine overheating
Inspect cables and linkage for bind-
ing, obstructions, and loose fasten-
ers.
See solutions under “Engine
Overheating” problem.
Excessive fuel consumption Restriction in air filter Remove filter and clean or replace
Engines and Transmissions
11.9
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