Polaris 2003 MSX - Manual (Page 100)

98
ENGINE TROUBLESHOOTING
Engine Overheats
Possible Cause Solution
Clogged jet pump intake Clean intake
Use of non-recommended fuel or oil Replace with recommended fluids
Sand or debris in cooling system Flush the cooling system
Plugged thermostat assembly Disassemble and clean thermostat
Plugged cooling system Inspect and clean cooling system
Clogged exhaust pipe screen fitting Clean screen fitting
Engine Backfires
Possible Cause Solution
Weak spark from spark plugs Inspect, clean and/or replace spark plugs
Incorrect spark plug gap Set gap to specs or replace plugs
Old or non-recommended fuel Replace with new fuel
Incorrectly installed spark plug wires See your Polaris dealer
Broken reed petals/valves See your Polaris dealer
Incorrect ignition timing See your Polaris dealer
Mechanical failure See your Polaris dealer