1992-1998 Kawasaki PWC Jet Ski Service Repair Manual., Page 255Get this manual
SHAFT ALIGNMENT
SPECIAL WORDS ON SHIM MATERIAL AND CRANKSHAFT-TO-IMPELLER SHAFT ALIGNMENT Observe the location and thickness of any shim placed the case and the hullBe sure to identify of the four stacks to ENSURE each will installed back in its original locationUnless the coupler showed signs of wear, the impeller was properly aligned with the crankshaftTherefore, it is to install the four of shim to the alignmentIf the coupler shows signs of wear, as evidenced by the of the "petals" being worn away by the fingers of the coupler, the impeller shaft was misaligned with the crankshaftC be exercise proper alignment when new coupler is installedThe axial flow pump installed on all models except the 550 Series, has long driveshaft with external splines at one end and metal coupler at the other endThe coupler "links" the cngine crankshaft with the impeller shaftThe mixed flow pump installed on the 550 Series models also has long driveshaftHowever, on this series, the shaft is referred to as the impeller shaft, because it is the only shaft in the pump