Northern Lights Lugger M773LW3, Operator'S Manual

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OM773LW3 11/20
25
Troubleshooting
ENGINE
PROBLEM POSSIBLE CAUSE RECOMMENDATION(S)
Engine Hard to Start Improper starting procedure • See starting section of this manual. Take
or Will Not Start special note of Bypass Switch operation.
No fuel • Check level of fuel in fuel tank.
Low battery output • Check electrolyte level and condition.
Excessive resistance • Clean and tighten all battery connections.
in starting circuit
Crankcase oil too heavy • Use oil of proper viscosity.
Improper type of fuel • Consult fuel supplier and use proper type
of fuel for operating condition.
Water, dirt or air in fuel system • Drain, flush, fill and bleed system.
Clogged primary • Clean or replace filter element.
fuel filter element
Clogged secondary • Replace filter element.
fuel filter element
Dirty or faulty injection nozzles • Have your dealer check injection nozzles.
Fuel injected but no ignition • Glow plug malfunction
• Low cylinder compression pressure
Engine Runs Irregularly Below normal engine temperature • Remove and check thermostat.
or Stalls Frequently
Clogged primary • Clean or replace filter element.
fuel filter element
Clogged secondary • Replace secondary filter element.
fuel filter element
Water or dirt in the fuel system • Drain, flush, fill and bleed system.
Dirty or faulty injection nozzles • Have your dealer check injection nozzles.
Air in fuel system • Inspect clamps and hoses on suction side
of fuel pump for air leak.
Improper type of fuel • Consult fuel supplier and use proper type
of fuel for operating condition.
Low idle, not stable • Uneven cylinder compression
Lack of Engine Power Intake air restriction • Service air cleaner.
• If in sound enclosure - ensure proper
position of snorkle hose
Clogged primary or secondary • Clean or replace filter element.
fuel filter element
Improper type of fuel • Consult fuel supplier and use proper type of
fuel for operating conditions.
Overheated engine • See “Engine Overheats” in next category.
Updated 2-10-20