1992 Johnson Evinrude "EN" 40 thru 55 Service Manual, P/N 508143, Page 216Get this manual
142 12Slide the Collar PI 334985 from OMC Driveshaft Shim Kit PIN 433032 onto the driveshaft with large end touching the bearing housing1421 3Insert the assembled driveshaft into the tool base1431 4Tighten preload screw against the driveshaft until groove on the spring-loaded plunger is flush with end of threadsTighten lock ring on preload screw 5Rotate the driveshaft several revolutions to seat bearings1441 6Position Shim Gauge PIN 334984 from OMC Driveshaft Shim Kit PIN 433032 against guide pins of the tool base1451 7Check the squareness of the bearing housing mounting surface by holding the gauge bar against the pinion while rotating just the bearing housing and measuring the clearance between the gauge bar and bearing housing with feeler gaugesMake measurements between each pair of screw holesReplace the bearing housing and repeat check if variance exceeds 0.004 in(0,10 mm) 1461 8Check the squareness of the pinion to the driveshaft by holding the gauge bar against the bearing housing, between the screw holes, while rotating just the driveshaft and pinion assembly and measuring the clearance between the gauge bar and the pinionReplace the gear set or the driveshaft, as necessary, and repeat the check if variance exceeds 0.002 in(0,050 mm)