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IMPORTANT

The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle. Always follow the warnings and instructions in Owner's Manual.

Click the link above for the Table Of Contents, or download a full PDF of the Owner Manual in the Owner Support area of Polaris.com.

Spark Plug Condition

Normal Plug

The normal insulator tip is gray, tan or light brown. There will be few combustion deposits. The electrodes are not burned or eroded. This indicates the proper type and heat range for the engine and the service.

TIP
The tip should not be white. A white insulator tip indicates overheating, caused by use of an improper spark plug or poor engine performance.

Fouled Plug

There are three possible causes of a fouled spark plug:

  • Wet Fouled Plug: Plug will be visibly wet and smell of fuel. A wet fouled plug is caused by an overly rich fuel mixture in combustion chamber. The plug may be reused if dried completely.

  • Carbon / Soot Fouled Plug: Insulator tip of plug will appear black. A carbon or soot fouled plug is caused by extensive light load usage, extended short trip driving, weak ignition system, among other causes. Replace plug.

  • Oil Fouled Plug: Plug will have a thin layer of oil visible. A oil fouled plug is caused by worn piston rings, valve guides and/or seals, or high oil carryover. Replace plug.

Parent topic: Spark Plugs