99
ENGINE TROUBLESHOOTING
Engine Overheats
Possible Cause
Solution
See Page
Clogged jet pump intake
Clean intake
93
Use of non-recommended fuel or oil
Replace with recommended fluids
38, 76
Sand or debris in cooling system
Flush the cooling system
82
Plugged cooling system
Inspect and clean cooling system
82
Clogged exhaust pipe orifice fitting
Clean orifice fitting
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Engine Backfires
Possible Cause
Solution
See Page
Weak spark from spark plugs
Inspect, clean and/or replace spark plugs
86
Incorrect spark plug gap
Set gap to specs or replace plugs
86
Old or non-recommended fuel
Replace with fresh recommended fuel
38
Incorrectly installed spark plug wires
See your Polaris dealer
--
Broken valves
See your Polaris dealer
--
Incorrect ignition timing
See your Polaris dealer
--
Mechanical failure
See your Polaris dealer
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https://www.boat-manuals.com/