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ENGINE TROUBLESHOOTING Engine Pings or Knocks Possible Cause Solution Poor quality or low octane fuel Replace with recommended fuel Incorrect ignition timing See your Polaris dealer Incorrect spark plug gap or heat range Set gap to specs or replace plugs Engine Loses Power Possible Cause Solution Weak spark Replace spark plugs and/or wires Incorrect fuel or fuel mixture Replace with recommended fuel Water present in fuel or oil tank Replace with recommended fluids Clogged fuel filter Replace filter Clogged jet pump intake Clean intake Clogged exhaust and/or cooling system Clean exhaust, flush cooling system Hydrolock See your Polaris dealer Too much load/weight on craft Reduce load per vehicle specifications Mechanical failure See your Polaris dealer Engine RPM is Too High With Limited Speed Possible Cause Solution Clogged jet pump intake Clean intake Cavitation, impeller damaged or worn See your Polaris dealer Unusual Noise or Vibration From Propulsion System Possible Cause Solution Weeds or debris lodged in impeller Clean the impeller Damaged driveshaft See your Polaris dealer Damaged pump bearings See your Polaris dealer Lack of lubrication on coupler or bearing carrier See your Polaris dealer 102
