Engine Runs Irregularly, Stalls or Misfires

Possible Cause	Solution
Fouled or defective spark plug(s)	Inspect, clean and/or replace spark plugs.
Worn or defective spark plug wires	See your Polaris dealer or other qualified person.
Incorrect spark plug gap or heat range	Set gap to specs or replace plugs.
Loose ignition connections	Check all connections and tighten.
Water present in fuel	Replace with new fuel.
Low battery voltage	Recharge battery to 12.8 VDC.
Kinked or plugged fuel tank vent line	Inspect and replace.
Incorrect fuel	Replace with recommended fuel.
Clogged air filter	Inspect and clean or replace.
Reverse speed limiter malfunction	See your Polaris dealer or other qualified person.
Electronic throttle control malfunction	See your Polaris dealer or other qualified person.
Other mechanical failure	See your Polaris dealer or other qualified person.

Possible Lean Fuel Cause	Solution
Low or contaminated fuel	Add or change fuel, clean the fuel system.
Low octane fuel	Replace with recommended fuel.
Clogged air filter	See your Polaris dealer or other qualified person.
Incorrect fuel	Replace with recommended fuel.

Possible Rich Fuel Cause	Solution
Fuel is very high octane	Replace with lower octane fuel.
Stopping/starting without adequate warm-up	Allow engine to warm up before operating and/or stopping.
Incorrect fuel	Replace with recommended fuel.
Clogged air filter	Inspect and clean or replace.