1992-1998 Kawasaki PWC Jet Ski Service Repair Manual., Page 249Get this manual
IMPELLERS
gine rprnThis type pump is more for craft equipped weight or intended to pull skierA jet pump seldom requires exc for the following: Impeller-to-pump case bec excessiveImpeller is damagedT oil seal around the impeller fails allowing water hullSilicone seal around the of the pump allows the pump ingest air