Polaris Sportsman 450 HO Manual Del Propietário página 155

Engine Backfires
Possible Cause
Weak spark from spark plug
Incorrect spark plug gap or heat range
Old or non-recommended fuel
Loose ignition connections
Water present in fuel
Incorrectly installed spark plug wires
Incorrect ignition timing
Mechanical failure
Engine Pings or Knocks
Possible Cause
Poor quality or low octane fuel
Incorrect ignition timing
Incorrect spark plug gap or heat range
TROUBLESHOOTING
Solution
Inspect, clean and/or replace spark
plug(s)
Set gap to specs or replace plugs
Check all connections and tighten
Replace with fresh recommended fuel
See your dealer
See your dealer
See your dealer
Solution
Replace with recommended fuel
See your dealer
Set gap to specs or replace plugs
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