For best snowmobile performance, change the chaincase oil every year. Over time, the oil level can drop or the oil can accumulate metal particles from the chain and gears, placing the sled at risk of failure. It’s best to change chaincase oil at the end of the season. That way your sled is ready to go in the fall.

Tools you need to change snowmobile chaincase oil

• Oil-drain pan
• Ratchet and correct-sized socket for your sled
• Funnel (if necessary)
• Chaincase oil

Locate and remove the drain plug. Examine the oil as it drains. If you notice a silver color, it means the chain and gears have produced metallic particles. That’s perfectly normal. A chain and gears will generate some metal. However, failure to change the oil yearly allows metal particles to circulate and lead to accelerated wear. That’s why it’s vital to change chaincase oil yearly. 

Once drained, ensure the gasket on the drain plug is in good shape and replace the plug.

Now it’s time to install the new chaincase oil. Remove the fill plug. The location of the fill plug varies from snowmobile to snowmobile. Position a rag beneath the fill hole to avoid spills. Fill the chaincase. Use a funnel if necessary.

With the sled in the video, the chaincase reservoir is full when oil runs out of the fill hole. Some snowmobile manufacturers specify the amount of fluid to install, so check your owner’s manuals for the proper quantity. Replace the fill plug and wipe down the area.

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