2004-2006 Kawasaki 900 STX Jet Ski Service Manual, Page 138Get this manual
PUMP AND IMPELLER 11-15 Pump and Impeller
Be sure the pump seal [A] is in place on the pump case
Pump and Impeller Inspection
Measure the impeller outside diameterIf the impeller is worn smaller than the service limit, replace itImpeller Outside Diameter Standard: 147.5 147.7 mm (5.807 5.815 in Service Limit: 146.5 mm (5.77 in
Examine the pump case [A]the pump case, replace If there are deep scratches inside