OL944D 11/13
27
Troubleshooting
ENGINE
PROBLEM
POSSIBLE CAUSE
RECOMMENDATION(S)
Lack of Engine Power
Low compression pressure
• Consult dealer.
(continued)
(worn piston rings, etc...)
Engine Overheats
Engine overloaded
• Check propeller size or pitch.
Low coolant level
• Fill tank to proper level.
• Check hoses for loose connections
and leaks.
Keel cooling tubes
• Remove paint from tubes.
have been painted
Cooling system needs flushing
• Flush cooling system.
Defective thermostat
• Remove and check thermostat.
Defective temperature gauge
• Check water temperature with thermometer
and replace gauge if necessary.
Water pump impeller worn
• Check the impeller and replace if necessary.
or broken
Engine Knocks
Insufficient oil
• Call your dealer.
Injection pump out of time
• Call your dealer.
Below normal engine temperature • Check your thermostats.
• Check water temperature to see if
temperature gauge is working properly.
Faulty fuel injector
• Call your dealer.
Engine overheating
• See “Engine Overheating” section.
High Fuel Consumption
Improper type of fuel
• Use correct fuel for temperature.
Clogged or dirty air cleaner
• Service air cleaner.
Engine overloaded
• Reduce the electrical load.
Improper valve clearance
• See your dealer.
Injection nozzles dirty
• See your dealer.
Injection pump out of time
• See your dealer.
Engine not at proper temperature • Check your thermostats.
• Check water temperature with thermometer
and replace gauge if necessary.
Below Normal
Thermostats not working properly • Check thermostats.
Engine Temperature
Temperature gauge
• Check water temperature with thermometer.
not working properly
Low Oil Pressure
Low oil level
• Fill crankcase to proper level.
Improper type of oil
• Drain and fill crankcase with correct oil.
Partially plugged oil filter
• Replace filter.
If you cannot correct problems with these procedures, see your
Northern Lights
dealer.
