2005 Kawasaki STx-12F Jet Ski Factory Service Manual., Page 262Get this manual
11-4 PUMP AND IMPELLER Specifications
Item Standard Service Limit (5(50.6 mm (0.0236 in Jet Pump Impeller Outside Diameter 147.5 147.7 mm (5.8071 5.8149 in (5Impeller learance 0.15 0.3 mm (0.0059 0.0118 in