2003 Polaris MSX 140 Personal Watercraft Service Manual, Page 136Get this manual
Final DrivePropulsion 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
1Clean driveshaft and support inblocks as shown (C)Measure runout by rotating shaft and observing dial indicator at point (B)Replace if runout exceeds the service limitNOTE: Excessive driveshaft runout can cause vibration, bearing, and spline failureSee PumpFinal Drive Troubleshooting at the end of chapter 2Drive Shaft Runout Service Limit: .005 (.13mm) Support in V-blocks at (C) Place dial indicator at (B) B