TROUBLESHOOTING
SECTION 7
Page 101CMD-4081877 / 90-865861040 MARCH 2004
0107.2 with CMD changes
Excessive Engine Temperature
Possible Cause Remedy
Water inlet or seacock closed. Open.
Drive belt loose or in poor condition. Replace or adjust belt.
Seawater pickups or sea strainer
obstructed.
Remove obstruction.
Faulty thermostat. Replace. See an authorized Cummins
MerCruiser Diesel dealer / distributor.
Coolant level low in closed cooling
section.
Check for cause of low coolant level and
repair. Fill system with proper coolant
solution.
Heat exchanger cores plugged with
foreign material
Clean heat exchanger. See an authorized
Cummins MerCruiser Diesel dealer /
distributor.
Loss of pressure in closed cooling section.
Check for leaks. Clean, inspect and test
pressure cap. See an authorized
Cummins MerCruiser Diesel dealer /
distributor.
Faulty seawater pickup pump. Repair. See an authorized Cummins
MerCruiser Diesel dealer / distributor.
Seawater discharge restricted or plugged. Clean exhaust elbows. See an authorized
Cummins MerCruiser Diesel dealer /
distributor.
Seawater inlet hose kinked (restricted) Position hose to prevent kinking
(restriction).
Use of improperly designed hose on inlet
side of seawater pump allowing it to
collapse.
Replace hose with wire reinforced design.
0108 with CMD changes
Insufficient Engine Temperature
Possible Cause Remedy
Faulty thermostats. Replace. See an authorized Cummins
MerCruiser Diesel dealer / distributor.
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