Gone Outdoors

How to Winterize a Kawasaki Jet Ski

by Jeff Dickinson

The end of summer means it's time for boat and personal watercraft owners to prepare to store their equipment for the winter. Winterizing a jet ski involves much more than driving it into a boat house and throwing a cover over it. Properly winterizing your Kawasaki jet ski will ensure that it is ready to hit the water as soon as the warm weather returns.

Remove all the water from your Kawasaki jet ski engine. Run the jet ski's engine while it is out of the water for 20 to 30 seconds to make sure that all the water is blown out of the engine.

Wash the Kawasaki jet ski with dish washing soap, a sponge and water to remove any mildew, mud and/or debris. Dry the jet ski thoroughly with a towel, paying special attention to the engine area.

Fill the gas tank, leaving room to add a bottle of fuel stabilizer. This prevents the gas in the jet ski from becoming corroded and leaving deposits in the engine and carburetor over the winter.

Remove the air filter and spray some storage oil or fogging oil into the carburetor. This helps keep the carburetor and engine lubricated over the winter. Remove the spark plugs and spray the storage oil into the spark plug cylinders. Put the air filter and spark plugs back into the engine.

Remove the black negative battery terminal, then the red positive terminal. Remove the battery from the jet ski and keep it in a garage or storage area that will be dry.

Items you will need
  • Dish washing soap
  • Sponge
  • Fuel stabilizer
  • Storage/fogging oil
  • Plastic tarp


  • Cover your jet ski with a blanket and then a waterproof tarp to keep it dry during the winter.
  • Purchase the fuel stabilizer and storage/fogging oil online or at a marine parts supplier.


  • Keep the jet ski away from items that can get warm over the winter, like a hot water heater, since it has gas in the tank.

About the Author

Jeff Dickinson has been writing professionally for 19 years. He began covering sports for The Huntsville Times in Alabama and moved to Atlanta in 1997. Dickinson worked in corporate communications for seven years before beginning his freelance career in 2005. He covers football for the Marietta Daily Journal and FANatic Sports and writes for a variety of websites.

Photo Credits