Polaris MSX 110 Owner's Manual For Maintenance And Safety page 103

ENGINE TROUBLESHOOTING
Engine Pings or Knocks
Possible Cause
Poor quality or low octane fuel
Incorrect ignition timing
Incorrect spark plug gap
Engine Loses Power
Possible Cause
Weak spark
Incorrect fuel or fuel mixture
Water present in fuel or oil reservoir
Clogged fuel filter
Clogged jet pump intake
Clogged exhaust and/or cooling system
Hydrolock
Too much load/weight on craft
Mechanical failure
Unusual Noise or Vibration From Propulsion System
Possible Cause
Weeds or debris lodged in impeller
Damaged driveshaft
Damaged pump bearings
100
Solution
Replace with fresh recommended fuel
See your Polaris dealer
Set gap to specs or replace plugs
Solution
Replace spark plugs and/or wires
Replace with fresh recommended fuel
Replace with recommended fluids
See your Polaris dealer or replace the filter
Clean intake
Clean exhaust, flush cooling system
See your Polaris dealer
Reduce load per vehicle specifications
See your Polaris dealer
Solution
Clean the impeller
See your Polaris dealer
See your Polaris dealer
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