1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 220Get this manual
13811391 4Insert the assembled
into the .tool base and tighten preload screw CD against the dnveshaft until groove GD on the spring-loaded plunger is flush with end of threadsTighten locking ring on preload screw
5Rotate the driveshaft several revolutions to seat bearing
1401 6Position Shim Gauge PIN 328366
of the tool base
against
guide pins
7 Check 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)Check 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 pinion or the driveshaft, as necessary, and repeat the check if variance exceeds 0.002 in(0,050 mm)9 Subtract the average clearance measurement obtained in Step from .020 in(0,508 mm) to determine the correct shim thickness required Select fewest number of shims to achieve correct thickness