2007-2010 Kawasaki Ultra 250X/260X/260LX PWC Factory Service Manual, Page 450Get this manual
STORAGE 15-5 Preparation for Storage
General
Wash the engine compartment with fresh water and remove the drain screw in the stern to drain the waterWipe up any water left in the compartment
CAUTION
Use only mild detergent in water to wash the hullHarsh solvents may attack the surface or smear the colors
Apply good grade of wax to all exterior hull surfaces Lightly spray all exposed metal parts with penetrating rust inhibitor Remove the seat, or block the seat up with 10 mm (0.39 in spacers to insure adequate ventilation, and prevent corrosion Cover the watercraft and store it in cleandry place