Highmarket Sports How-To's





Maintaining your Polaris snowmobile is essential for peak performance and safety. One critical aspect of maintenance is adjusting the drive chain tension. In this guide, we'll walk you through the process of adjusting the drive chain tension on your 2015-2020 RUSH Pro-S. Not only will you keep your snowmobile in top condition, but you'll also ensure a smoother and safer ride.

Required Tools and Supplies

Before we dive into the step-by-step guide, let's make sure you have all the necessary tools and supplies:

  • Torque Wrench
  • 17mm Wrench
  • 17mm Crowfoot Wrench
  • Shop Rags
  • Tape Measure

For more information on tools and their usage, be sure to check out our comprehensive "Tools and Fasteners Guide."

Safety First

Before we get started, remember to prioritize safety. Always wear safety glasses and nitrile gloves when servicing your Polaris snowmobile. Safety is paramount!

Step-by-Step Guide: Adjusting Drive Chain Tension

  1. Find a Flat, Level Surface: To ensure a stable working environment, park your snowmobile on a flat and level surface.

  2. Remove Side Panels: Begin by releasing the rubber strap and turning the two quarter-turn latches to remove both side panels. Pull them out and lift them up to remove.

  3. Rotate Driven Clutch: Rotate the driven clutch counter-clockwise to its end stop. This action will move all the chain slack to the tensioner side.

  4. Lock the Parking Brake: Lock the parking brake securely.

  5. Battery Removal (If Applicable): If your snowmobile is equipped with a battery, remove it to allow for additional clearance. Always remove the negative cable first to prevent arcing.

  6. Loosen the Adjuster Bolt Jam Nut: Using a 17mm wrench, carefully loosen the adjuster bolt jam nut.

  7. Finger-Tighten the Adjuster Bolt: Now, finger-tighten the adjuster bolt until it can no longer be adjusted by hand. After that, back it off one quarter of a turn.

  8. Retighten the Jam Nut: Using a 17mm crowfoot wrench, retighten the jam nut and torque it to 21 ft-lbs (28 Nm) while holding the adjuster bolt in place.

  9. Battery Reinstallation (If Applicable): If you removed the battery, now is the time to reinstall it. Start with the positive cable first to prevent arcing.

  10. Reinstall Side Panels: Insert the tabs at the bottom and top to reinstall both side panels.

  11. Secure Panels: Finally, secure the rubber strap and the two quarter-turn latches to ensure the side panels are firmly in place.


Properly adjusting the drive chain tension on your 2015-2020 RUSH Pro-S is an important aspect of snowmobile maintenance. Following these steps will not only keep your snowmobile in excellent condition but also enhance your riding experience in the snow. Remember to prioritize safety, and if you have any doubts, consult your Polaris owner's manual or seek professional assistance.

For those who prefer to leave their snowmobile maintenance in the capable hands of experts, consider bringing your sled to Highmarket Sports. Our full-time, experienced mechanics are here to address any aspect of your snowmobile, ensuring quick and efficient repairs. Plus, you can enjoy some downtime while you wait at our on-site restaurant. It's a win-win for both you and your snowmobile!

By Tyler Smith

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