How to prepare engine and fuel of a Yamaha 250 quad for storage [SOLVED]

I am getting ready to store my Yamaha 250 quad for the next 8 months. I am wondering what you recommend for preparing the engine and fuel?


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Jim D.
Jim D.
4 years ago

Great question Mike! Engine storage is a matter of protecting your ATV’s carburetor circuits, intake and upper engine parts from getting dried out and from corrosion, plus protecting the fuel from forming unstable fuel molecules (gum and varnish). So with an empty tank or low amount of fuel in your tank, mix a combination of one part Sea Foam Motor Treatment to two parts gasoline. For a quad you could go 10 oz of Sea Foam to 20 oz of fresh gas. Run the engine for 5 minutes, then shut it off.  After letting the engine cool, pull the plugs and spray a healthy burst of Sea Foam Spray or Deep Creep into each cylinder cavity. At that point you’re done and should be good to go!