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ENGINE
PROBLEM
Lack of Engine Power
(continued)
Engine Overheats
Engine Knocks
High Fuel Consumption
Below Normal
Engine Temperature
Low Oil Pressure
If you cannot correct problems with these procedures, see your Northern Lights dealer.
Troubleshooting
POSSIBLE CAUSE
Low compression pressure
(worn piston rings, etc...)
Engine overloaded
Low coolant level
Keel cooling tubes (marine sets)
have been painted
Cooling system needs flushing
Defective thermostat
Defective temperature gauge
Water pump impeller worn
or broken
Insufficient oil
Injection pump out of time
Below normal engine temperature
Faulty fuel injector
Engine overheating
Improper type of fuel
Clogged or dirty air cleaner
Engine overloaded
Improper valve clearance
Injection nozzles dirty
Injection pump out of time
Engine not at proper temperature
Thermostats not working properly • Check thermostats.
Temperature gauge
not working properly
Low oil level
Improper type of oil
Partially plugged oil filter
OM944W3 1/23
RECOMMENDATION(S)
• Consult dealer.
• Reduce the electrical load.
• Fill tank or radiator to proper level.
• Check hoses for loose connections
and leaks.
• Remove paint from tubes.
• Flush cooling system.
• Remove and check thermostat.
• Check water temperature with thermometer
and replace gauge if necessary.
• Check the impeller and replace if necessary.
• Call your dealer.
• Call your dealer.
• Check your thermostats.
• Check water temperature to see if
temperature gauge is working properly.
• Call your dealer.
• See "Engine Overheating" section.
• Use correct fuel for temperature.
• Service air cleaner.
• Reduce the electrical load.
• See your dealer.
• See your dealer.
• See your dealer.
• Check your thermostats.
• Check water temperature with thermometer
and replace gauge if necessary.
• Check water temperature with thermometer.
• Fill crankcase to proper level.
• Drain and fill crankcase with correct oil.
• Replace filter.
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