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TROUBLESHOOTING
40 Troubleshooting TP-6901 6/14
Operates Erratically or Unevenly Incorrect fuel Make sure fuel system is configured
properly for LPG or NG supply.
Dirty/restricted fuel system Check fuel system and clean
components as needed.
Low fuel supply pressure Check and adjust.
Engine overloaded Disconnect or reduce loads.
Loose wiring at shut-off valve(s) Check wiring and repair connections.
Faulty spark plug Inspect, adjust, or replace as needed.
Dirty air filter Inspect and replace as needed.
Knocks or Pings Incorrect fuel Make sure fuel system is configured
properly for LPG or NG supply.
Engine overloaded Disconnect or reduce loads.
Faulty spark plug Inspect, adjust, or replace as needed.
Dirty/restricted fuel system Check fuel system and clean
components as needed.
Dirty air filter Inspect and replace as needed.
Skips or Misfires Incorrect fuel Make sure fuel system is configured
properly for LPG or NG supply.
Faulty spark plug Inspect, adjust, or replace as needed.
Dirty/restricted fuel system Check fuel system and clean
components as needed.
Dirty air filter Inspect and replace as needed.
Backfires Incorrect fuel Make sure fuel system is configured
properly for LPG or NG supply.
Faulty spark plug Inspect, adjust, or replace as needed.
Dirty/restricted fuel system Check fuel system and clean
components as needed.
Dirty air filter Inspect and replace as needed.
Overheats Incorrect fuel Make sure fuel system is configured
properly for LPG or NG supply.
Dirty/restricted fuel system Check fuel system and clean
components as needed.
Incorrect oil level Check engine oil level; add as needed.
Engine overloaded Disconnect or reduce loads.
Faulty spark plug Inspect, adjust, or replace as needed.
Consumes Excess Fuel Faulty spark plug Inspect, adjust, or replace as needed.
Dirty/restricted air cleaner element Clean or replace.
Incorrect fuel pressure Check and adjust fuel pressure.
ECM Does Not Store DTC Faulty electrical connections,
components, or wiring
Contact KOHLER service.
Problem Possible Cause Solution