Polaris 2010 FST IQ Touring - Manual (Page 146)

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TROUBLESHOOTING
Engine and Drive Train Troubleshooting
Engine Turns Over, Fails to Start
Engine Backfires
Probable Cause Solution
Out of fuel Refuel.
Water is present in fuel See your dealer.
Old or non-recommended fuel Replace with fresh recommended fuel.
Fouled or defective spark plugs Inspect plugs and replace if necessary.
No spark to spark plug See your dealer.
Water or fuel in crankcase See your dealer.
Clogged fuel filter Replace the filter.
Low battery voltage Recharge the battery to 12.8 VDC.
Poor engine compression See your dealer.
Mechanical failure See your dealer.
Probable Cause Solution
Weak spark from spark plug Inspect, clean and/or replace spark plugs.
Incorrect spark plug gap or heat range Set gap to specs or replace plugs.
Old or non-recommended fuel Replace with fresh recommended fuel.
Mechanical failure See your dealer.
Loose ignition connections Check all connections and tighten.
Water present in fuel Replace with fresh recommended fuel.
Exhaust manifold leak Inspect and repair, or see your dealer.