1991+ Kawasaki 650 SC Factory Service Manual, Page 177Get this manual
STORAGE 14-3
eClean the filter screens (see Fuel Filter Screen Cleaning in the Fuel System chapter)e Leave the fuel filler cap loose to prevent condensation in the tank
eStart the engine and run it in 15 second periods until all fuel in the carburetor is used upWait minutes between 15 second running periods
CAUTION
Do not run the engine with the watercraft out of the water for more than 15 seconds at timeOverheating can cause severe engine and exhaust system damage