2004-2005 Kawasaki STX-15F Jet Ski Factory Service Manual., Page 40Get this manual
PERIODIC MAINTENANCE 2-21 Periodic Maintenance Procedures
Luenanvie gthe engine idle for several minutes with the water nhe ee dl Turvn tofef tengwatear.feLwatvmethetoenlgeiare tiheinwater out of the Re ine isc exhaust systemCAUTION
Do not run the engine without cooling water supply for more than 15 seconds, especially in high revolutionary speed or severe engine and exhaust system damage will occurw Sdaitpcth roff the engine, remove the garden hose and the eInstall the flushing cap securely
Bilge System Flushing