Bombardier SeaDoo 2000 factory shop manual volume 1, Page 311Get this manual
Section 09 PROPULSION SYSTEM Subsection 02 (JET PUMP)
Needle Bearing and Impeller Shaft
WEAR Inspect needle bearings no23 and their contact surfaceCheck for scoring, pitting, chipping or other evidence of wearWith your finger nail, feel contact surface of sealIf any irregular surface is found, renew impeller shaft no24Install bearings, then install impeller shaft and rotate itMake sure it turns smoothlyRADIAL PLAY Radial play is critical for jet pump unit life spanRadial play of impeller shaft is checked with shaft in housing, without impellerRetain housing in soft jaw vise making sure not to damage housing lugSet dial gauge and position its tip onto shaft end, close to end of threadsMove shaft end up and downDifference between highest and lowest dial gauge reading is radial playMaximum permissible radial play is 0.05 mm (.002 in)F01J19A
TYPICAL MEASURING IMPELLER SHAFT RADIAL PLAY 1Dial gauge 2Measure close to flats at shaft end