2004 Poalaris MSX110, MSX150 PWC Original Service Manual, Page 180Get this manual
PROPULSION WARNING
Before working on the drive system, be sure the lanyard cord and lock plate are removed from the engine stop switch to kill the ignition or severe injury could result
Impeller Clearance
1Remove lanyard cord and lock plate from engine stop switchDisconnect battery ground () cable2Remove intake grate and check impeller to housing clearance with feeler gaugeMeasure clearance at leading edge, middle, and trailing edge of each bladeReplace impeller if clearance exceeds service limit at any pointIf clearance exceeds service limit with new impeller, replace pump housingImpeller Clearance Std: .002.008 (.05 -.20 mm) Service Limit: .020 (.5 mm)
Drive Shaft Inspection