OM944F 5/21
37
If you cannot correct problems with these procedures, see your
Northern Lights
dealer.
Troubleshooting
ENGINE
PROBLEM
POSSIBLE CAUSE
RECOMMENDATION(S)
High Oil Consumption
Break-in period
• Oil consumption decreases after break in.
Crankcase oil too light
• Use proper viscosity oil.
Oil leaks
• Check for leaks in lines around gaskets
and drain plug.
Crankcase over full
• Remove excess oil.
Engine Emits Black
Clogged or dirty air cleaner
• Service air cleaner.
or Gray Exhaust Smoke
Defective muffler
• Have dealer check back pressure.
(back pressure too high)
Improper fuel
• Use correct fuel for temperature.
Fuel pump faulty
• See your dealer.
Injection nozzles dirty
• See your dealer.
Engine overloaded
• Reduce the electrical load.
Injection nozzles dirty
• See your dealer.
Injection pump faulty
• Consult your dealer.
Engine out of time
• See your dealer.
Incorrect valve clearance
• Consult your dealer.
Engine Emits
Improper fuel
• Use correct fuel for temperature.
White Smoke
Cold engine
• Warm up engine to normal operating
temperature.
Defective thermostat
• Remove and check thermostat.
Engine out of time
• See your dealer.
Low Compression Pressure
• See your dealer.
Low engine oil viscosity
• Use proper viscosity of oil to ambient
temperature.
Excessive amount of engine oil
• Maintain correct oil level.
Fuel injection nozzles faulty
• See your dealer.
(uneven injection)
