1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, P/N 507875, Page 300Get this manual
5Rotate the driveshaft several revolutions to seat bearingsf41 6Position the correct shim gauge against guide pins of the base 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 the bearing housing with feeler gaugesMake measurements between each pair of screw holesReplace the bearing housing and repeat check if variance exceeds 0.004 in(0,010 mm)
kl BCheck 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)
9Subtract the average clearance measurement obtained in Step from 0.020 in(O,50B mm) V6, 0.030 in(0,762 mm) VB to determine the correct shim thickness requiredSelect the fewest number of shims to achieve the correct thickness10Remove the driveshaft from the tool baseRemove the collar and bearing housing from the driveshaft and add the required amount of shimsUse extreme care when removing bearing housing to avoid damaging the sealsUse OMC Driveshaft Seal Protector