1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 290Get this manual
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15Reach inside the gearcase and remove the pin ion and 18 roller bearings from the pinion bearing cup 16Rotate propeller shaft and push down on the shift rod to engage reverse gear positionUnthread the shift rod from the shifter detentRemove the six screws, shift rod and cover assembly from the gearcaseDiscard the cover gasketRemove and discard the O-ring from inside the cover17Remove the filldrain plug from the gearcaseRemove the propeller shaft assembly from the gearcaseRemove the filldrain plug before removing the propeller shaft assembly to avoid breaking the filldrain plug magnet18Remove and replace the zinc anode if the anode is substantially eaten away19Remove the pinion bearing from the gearcase as followsRemove the bearing retaining screw from the gearcase before attempting to remove the pinion bearingAssemble the following components of OMC Special Tool PIN 391257 (Universal Pinion Bearing Remover and Installer), Flange Nut PIN 326586Plate PI 391260Rod PIN 326582 and Remover PI 326579 in the gearcaseUsing 1-38" wrenchhold the remover in placeUsing 34" wrench, turn the flange nut and draw the bearing out of the gearcase