1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, P/N 507875, Page 299Get this manual
0.075 in(1,9 mm)
Driveshaft Shimming Using Tool PIN 393185 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 driveshaft, it is necessary to gauge and select the proper shims to restore factory clearanceGauge bars are precision made and should be handled carefullyThe length of each gauge is stamped near the part number and this dimension can be used to measure the gauge to confirm accuracy
INotel Degrease pinion and driveshaft tapers prior to assemblyf"1l 1Assemble the driveshaft bearing housingthrust washer thrust bearingand pinion onto the driveshaftUse OMC Driveshaft Seal Protector PIN 318674 whenever installing or removing the bearing housingLightly coat the threads of the pinion nut with outboard lubricantTighten the pinion nut to torque listed in chart