ENGINE RUNS IRREGULARLY, STALLS, OR
MISFIRES
POSSIBLE CAUSE SOLUTION
Fouled or defective spark plugs Inspect, clean and/or replace spark
plugs
Worn or defective spark plug wires Your POLARIS dealer or qualified
person can assist
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
or filter
Inspect and replace
Kinked idle air control lines Inspect; rotate lines to remove kink
Incorrect fuel Replace with recommended fuel
Clogged air filter Inspect and replace clogged/wet air
filter, and also check for obstructed
intake system, debris or cargo
blocking intake vents
Clogged intake pre-filter Inspect and clean (with soapy water)
or replace
Other mechanical failure See your dealer
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 fuel filter See your dealer
Low fuel pressure See your dealer
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