Polaris RZR 800 Owner's Manual page 141

Engine Pings or Knocks
Possible Cause
Poor quality or low octane fuel
Incorrect ignition timing
Incorrect spark plug gap or heat range
Engine Runs Irregularly, Stalls or Misfires
Possible Cause
Fouled or defective spark plugs
Worn or defective spark plug wires
Incorrect spark plug gap or heat range
Loose ignition connections
Water present in fuel
Low battery voltage
Kinked or plugged fuel tank vent line
Incorrect fuel
Clogged air filter
Other mechanical failure
Possible Lean Fuel Cause
Low or contaminated fuel
Low octane fuel
Clogged fuel filter
Possible Rich Fuel Cause
Fuel is very high octane
TROUBLESHOOTING
Solution
Replace with recommended fuel
See your dealer
Set gap to specs or replace plugs
Solution
Inspect, clean and/or replace spark plugs
See your dealer
Set gap to specs or replace plugs
Check all connections and tighten
Replace with new fuel
Recharge battery to 12.8 VDC
Inspect and replace
Replace with recommended fuel
Inspect and clean or replace
See your dealer
Solution
Add or change fuel, clean the fuel system
Replace with recommended fuel
See your POLARIS dealer
Solution
Replace with lower octane fuel
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