1996-2002 Kawasaki 1100ZXi Jet Ski Factory Service Manual., Page 113Get this manual
10-10 PUMP AND IMPELLER
mpeer Clearance
Impeller clearance is critical proper performanceIf the pump case and impeller are not visibly damaged, poor performance may be caused by too much impeller clearanceT check impeller clearance, remove the grate and insert feeler gauge] between the tip of the impeller blade [B] and the pump case