Northern Lights Lugger M773LW3, Operator'S Manual

Page: 29 / 58

OM773LW3 11/20
27
Troubleshooting
ENGINE
PROBLEM POSSIBLE CAUSE RECOMMENDATION(S)
Below Normal Engine
Temperature Thermostats not working properly • Check thermostats.
Temperature gauge • Check water temperature with thermometer.
not working properly
Low Oil Pressure Low oil level • Fill crankcase to proper level.
Clogged filter and strainer or • Repair or replace
worn bearings and oil pump
Improper type of oil • Drain and fill crankcase with correct oil.
Partially plugged oil filter • Replace filter.
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.
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.
Injection nozzles dirty • Contact your dealer.
Engine timing off • Contact 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 timing off • Contact your dealer.
If you cannot correct problems with these procedures, see your Northern Lights dealer.