Polaris Outlaw 450 S - Manual (Page 197)

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Troubleshooting
Engine Runs Irregularly, Stalls or Misfires
Possible Lean Fuel Mixture Cause Solution
Low or contaminated fuel Add or change fuel, clean the fuel system
Low octane fuel Replace with recommended fuel
Old or non-recommended fuel Replace with recommended fuel
Clogged fuel valve screen See your Polaris dealer
Incorrect jetting See your Polaris dealer
Possible Rich Fuel Mixture Cause Solution
Overuse of choke Inspect, clean and/or replace spark plugs
Fuel is very high octane Replace with recommended octane fuel
Incorrect jetting See your Polaris dealer
Plugged, dirty or wet air filter Clean pre-filter, replace main filter as needed