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Excessive Engine Temperature
Possible Cause Remedy
• Seacock closed.
• Drive belt loose or in poor
condition.
• Seawater pickups ob-
structed.
• Faulty thermostat.
• Coolant level low in closed
cooling section (If
Equipped).
• Heat exchanger cores
plugged with foreign mate-
rial (If Equipped).
• Loss of pressure in closed
cooling section (If
Equipped).
• Closed cooling section
dirty (If Equipped).
• Faulty seawater pickup
pump.
• Seawater discharge re-
stricted or plugged.
• Open.
• Replace and/or adjust belt.
• Remove obstruction.
• Replace.
• Check for cause of low
coolant level and repair. Fill
system with proper coolant
solution.
• Clean heat exchanger.
• Check for leaks. Clean, in-
spect and test pressure
cap.
• Clean.
• Repair.
• Clean exhaust elbows.
Insufficient Engine Temperature
Possible Cause Remedy
• Faulty Thermostat.
• Replace.
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