1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 281Get this manual
10Align the bossed word "FRONT" toward the shift rod and push the driveshaft bearing housing in positionApply OMC Gasket Sealing Compound to the threads of the housing retaining screwsInstall the screws and tighten the screws little at time to press the bearing housing down evenlyTighten the screws to torque of 11-14 Nm (8-10 ftIbs11Place the smaller thrust washer in recess of the reverse gearOil and install the thrust bearing and the larger thrust washer on the hub of the reverse gearSlide the reverse gear onto the propeller shaft until it engages the pinion12Slide the bearing housing retainer plate into position over the propeller shaft13Using OMC Special Tool PIN 311879 (Retaining Ring Pliers) install the two retaining rings with their gap toward the top Retaining rings are under extreme pressure during installation,} Wear safety glasses and proceed with care to avoid unsnapping the ring from the pliersLook inside the gearcase and make sure that the retaining rings are seated in the grooves in the gearcase COA3597