1990 Johnson Evinrude "ES" 60 thru 70 Service Manual, P/N 507873, Page 196Get this manual
Driveshaft Shi mm ing Using Too PI 320739 The driveshaft pinion is precisely meshed with the forward and reverse gears by the use of shim or shims between the driveshaft bearing housing and thrust washerWhen installing new thrust bearing or washer, bearing housing, pinion or drives haft, it is necessary to gauge and select the proper shims to restore factory clearance 1Note Degrease pinion and driveshaft tapers pr ior to assembly 1Clean the driveshaft and pinion in clean solvent and dry thoroughlyAssemble the pinion to the driveshaft and tighten the pinion nut to torque of 40-45 ft Ibs(54-60 Nm)2Place OMC Pinion Shim Gauge PI 315767 in vise, as shown
1371 3Select 0.020 in(0,508
mm) of driveshaft shimsClean the shims in solvent and dry thoroughlyCarefully measure shims using micrometerPosition the shims between the driveshaft and shim gauge, as shown