How to Unseize a Snowmobile Engine

Un-seizing a snowmobile engine is just like un-seizing any other type of engine.

Engines that are left unused for extended periods of time have a tendency to "seize up" when you attempt to start them. Un-seizing a snowmobile engine is like un-seizing any other type of engine. A seized engine means that the engine's pistons are not moving within the cylinders. To un-seize an engine, you must lubricate these pistons so that they become unstuck from the cylinder sidewall. Once you free the piston from the cylinder sidewall, the engine will be un-seized and turn over with ease.

Things You'll Need

• Ratchet tool
• Spark plug socket
• Penetration oil

Instructions

1. Remove the snowmobile's spark plugs with the ratchet tool and spark plug socket. Set the spark plugs aside.

2. Coat the snowmobile's cylinders with a penetration oil such as Kroil, Marvel Mystery Oil or Liquid Wrench until the cylinders are saturated with oil.

3. Apply fresh oil to the cylinders periodically over the course of several days. Let the engine sit for a minimum of two days before moving on to Step 4.

4. Replace the engine's spark plugs and turn the engine over. If the engine is still seized, repeat Steps 1 through 3 until it un-seizes.

References

• YouTube: How to Un-Seize an Engine
• YouTube: How to Remove a Spark Plug