1998 Johnson Evinrude EC 50 thru 70 HP 3-Cylinder Service Manual, Page 218Get this manual
8Check the squareness ofthe bearing housing mounting surface by holding the gauge bar againstthe pinion while rotating just the bearing housing and measuring the clearance between the gauge bar and the bearing housing with feeler gaugesMeasure between each pair of screw holesReplace the bearing housing and repeat check if variance exceeds 0.004 in(0,010 mm) 1421
9Check 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 assem bly and measuring the clearance between the gauge bar and the pinion Replace the pinion or the driveshaft, as necessa ry, and repeat the check if variance exceeds 0.002 in(0,050 mm)