Northern Lights M773LW3 Operator's Manual page 29

ENGINE
PROBLEM
Below Normal Engine
Temperature
Low Oil Pressure
High Oil Consumption
Engine Emits Black
or Gray Exhaust Smoke
Engine Emits
White Smoke
If you cannot correct problems with these procedures, see your Northern Lights dealer.
Troubleshooting
POSSIBLE CAUSE
Thermostats not working properly • Check thermostats.
Temperature gauge
not working properly
Low oil level
Clogged filter and strainer or
worn bearings and oil pump
Improper type of oil
Partially plugged oil filter
Break-in period
Crankcase oil too light
Oil leaks
Clogged or dirty air cleaner
Defective muffler
(back pressure too high)
Improper fuel
Injection nozzles dirty
Engine timing off
Improper fuel
Cold engine
Defective thermostat
Engine timing off
OM773LW3 11/20
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RECOMMENDATION(S)
• Check water temperature with thermometer.
• Fill crankcase to proper level.
• Repair or replace
• Drain and fill crankcase with correct oil.
• Replace filter.
• Oil consumption decreases after break in.
• Use proper viscosity oil.
• Check for leaks in lines around gaskets
and drain plug.
• Service air cleaner.
• Have dealer check back pressure.
• Use correct fuel for temperature.
• Contact your dealer.
• Contact your dealer.
• Use correct fuel for temperature.
• Warm up engine to normal operating
temperature.
• Remove and check thermostat.
• Contact your dealer.