OM-C3 11/21
69
ENGINE
PROBLEM
POSSIBLE CAUSE
RECOMMENDATION(S)
Engine Emits Black or
Gray Exhaust Smoke
(cont.)
Engine Overheats
High Fuel Consumption
Engine out of time
Turbocharger not functioning
Electronic fuel system problem
Engine overloaded
Low coolant level
Faulty coolant tank cap
Stretched poly-vee belt or
defective tensioner
Faulty sea (raw) water pump
Low engine oil level
Cooling system needs flushing
Defective thermostat
Defective temperature gauge or
sender
Electronic fuel system problem
Incorrect grade of fuel
Plugged heat exchanger
Plugged keel cooler
Trash or debris in engine
compartment
Improper type of fuel
Clogged or dirty air cleaner
Engine overloaded
Improper valve clearance
Injection nozzles dirty
Injector tip deposits
Consult Authorized Dealer
Consult Authorized Dealer
Consult Authorized Dealer
Reduce load
Fill coolant tank to proper level. Check coolant
tank and hoses for loose connections or leaks
Replace coolant tank cap
Check automatic belt tensioner and check belts
for stretching. Replace if necessary.
Check/replace impeller/pump
Check oil level. Add oil as required.
Flush cooling system
Remove and check thermostat
Check water temperature with thermostat and
replace if necessary
Consult Authorized Dealer
Use correct grade of fuel
Clean heat exchanger and core
Flush and clean keel cooler. Check for marine
growth on O.D. of keel cooler tubes.
Clean engine compartment
Use proper type of fuel
Service air cleaner
Reduce load
Consult Authorized Dealer
Consult Authorized Dealer
Consult Authorized Dealer
Troubleshooting