Faults and probable causes
Engine overheats / Engine coolant temperature too high
Faults
Solution
Seacock is closed
Open the Seacock
Seawater filter is clogged
Close the Seacock and clean the filter
Seawater pump is sucking air
Check the position and seal of the seawater filter cover
and the suction hose
Fresh water circuit pump belt is slack or faulty
Re-tighten or replace the belt
Seawater pump rotor is faulty
Replace the rotor
Insufficient coolant
Fill with coolant and check that the cooling system is
leak-tight
Thermostat is malfunctioning
Replace the thermostat
Cooling system is blocked
Locate the problem and clean
Closed cooling circuit is dirty
Clean and rinse
Loss of pressure in the closed cooling circuit
Check there are no leaks. Clean, inspect and check the
fill cap
Coolant is unsuitable
Use the recommended coolant (see technical
specifications)
24
Troubleshooting
