Glad you asked...
There are a number of things you will want to do to it in order to store it for the winter. They are fairly simple. Many you do after each ride. You can find more information here: http://www.waverunnerrentals.com/cms/ind...
Then again, this answer might help you...
It takes just a few easy steps to winterize your Yamaha waverunner. Drain the water from the engine by tilting the craft on it's trailer and starting the engine for about thirty seconds. Top off the fuel tank and add some fuel stabilizer, to keep condensation from forming. Remove the battery and cover the craft with a protective cover. For more information look here: http://www.jetski.com/article.cfm?id=686...;

