if you are referring to the winterizing to prevent water freezing ,the best way i found is to get a small sump pump that you can attach a garden hose to and hook it up to the threaded water flushing hose on seadoo, put the pump in a 5 gal pail with your anitfreeze coolant for aluminum engines( mixed at 50/50) start engine, plug in your pump and within seconds it will have run through the cooling system replacing the water with antifreeze mixture.I usually catch what comes out in another pail and reuse what i saved for the next year. you can buy the pumps at hardware stores for about $ 50.00.