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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 Maintenance

Inspect / replace the spark plugs as outlined in the periodic maintenance table.

The spark plugs can be serviced by using the following procedure.

  1. Position the snowmobile on a level surface.

  2. Remove both side panels by turning the three quarter-turn latches.

  3. Disconnect the two hood latches.

  4. Lift the hood up slightly, disconnect the hood wire harness connector, and remove the hood.

  5. Using the Torx® end of the spark plug wrench 1, remove the two fasteners 2 from the load center.

  6. Remove the two push pin rivets 3 from the front intake tube. Remove the front intake tube and set aside.

  7. Carefully unclip the retention clamp 4 from the radiator hoses and rotate the load center away from the radiator.

    NOTICE
    Exhaust assembly hidden for image clarity.

  8. Remove the spark plug leads.

  9. Clean the area around the spark plugs so no debris falls into the engine when the plugs are removed.

  10. Using the spark plug wrench, remove the spark plugs 5 by rotating each plug counterclockwise.

  11. Inspect the electrodes for wear and carbon buildup and verify there are no cracks around the insulator. The plugs should have a sharp outer edge with no rounding or erosion.

  12. Inspect the color of each plug as follows:

    • A light brown/dark tan color indicates the engine is running properly.

    • If the spark plug electrode/insulator tip is white, the engine may be running lean. Inspect the engine, throttle body boots, etc. for air leaks.

    • If the spark plug electrode/insulator is black, oily, or shows heavy soot, the engine may be running rich. Inspect the engine, fuel system and lubrication system for problems.

  13. Inspect and adjust the spark plug gaps. Replace with the recommended plug as needed.

    MEASUREMENT

    NGK® BPR8ES Gap:

    0.027 in (0.70 mm)

  14. Carefully install the spark plugs into the engine and torque to specification.

    TORQUE

    Spark Plug:

    18-22 ft-lbs (24-30 N·m)

  15. Apply a small amount of dielectric grease to the spark plug caps.

  16. Reconnect the spark plug caps onto the plugs and make sure they are secure.

  17. Reinstall the load center back onto the radiator and reconnect the clamp to the radiator hoses.

  18. Reinstall the front intake tube. Make sure the tube is fully inserted and aligned to the intake tube assembly.

  19. Reinstall the two push pin rivets.

  20. Place the spark plug wrench back into the holder.

  21. Reinstall the hood panel, ensuring the front tabs are properly engaged.

  22. Reconnect the hood wire harness connector underneath and verify it is secure.

  23. Secure the two hood panel latches.

  24. Reinstall both side panels by inserting the upper tab and pivoting in to engage the lower tab.

  25. Turn the three quarter-turn latches to secure each panel.

  26. In a well-ventilated area, start the vehicle to ensure proper operation.

Parent topic: Spark Plugs