2003 Kawasaki 1100 STX D.I. Jet Ski Factory Service Manual, Page 189Get this manual
11-12 PUMP AND IMPELLER Pump and Impeller
Push the above wrench assembly into the impeller [A], and then lightly press [C] the wrench assembly to seat the grease seal into the impeller sleeve [B]
CAUTION
Do not press the grease seal heavilyYou could damage the grease seal
Be sure the O-ring [A] is in place on the pump cap