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TROUBLESHOOTING
ENGINE BACKFIRES
Possible Cause Solution
Weak spark from spark
plugs
Inspect, clean and/or replace spark
plugs
Incorrect spark plug
gap or heat range
Set gap to specs or replace plugs
Old or non-
recommended fuel
Replace with new fuel
Incorrectly installed
spark plug wires
See your dealer
Incorrect ignition
timing
See your dealer
Mechanical failure See your dealer
ENGINE RUNS IRREGULARLY, STALLS OR MISFIRES
Possible Cause Solution
Fouled or defective
spark plugs
Inspect, clean and/or replace spark
plugs
Worn or defective
spark plug wires
See your dealer
Incorrect spark plug
gap or heat range
Set gap to specs or replace plugs
Loose ignition
connections
Check all connections and tighten
Water present in fuel Replace with new fuel
Low battery voltage Recharge battery to 12.5 VDC
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