Northern Lights Lugger M673D, Operator'S Manual

Page: 27 / 35

OM673 09/09
25
Troubleshooting
ENGINE
PROBLEM POSSIBLE CAUSE RECOMMENDATION(S)
Engine Overheats
Low coolant level • Fill tank or radiator to proper level.
• Check hoses for loose connections
and leaks.
Keel cooling tubes have been • Remove paint from tubes.
painted (marine)
Cooling system needs fl ushing • 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/broken • Check impeller and replace if necessary.
Engine Knocks
Insuffi cient 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.
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.
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 fi ll crankcase with correct oil.
Partially plugged oil fi lter • Replace fi lter.
If you cannot correct problems with these procedures, see your Northern Lights dealer.