1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 270Get this manual
3Remove the four screws retaining the impeller housing the gearcase to
4Slide the water pump assembly off the driveshaftUse caution to avoid loss of the impeller pin Remove the impeller plate from the gearcase5Remove the four propeller shaft bearing housing screws with O-rings using 516" thin wall socketDiscard the O-rings from the screws6Using two OMC Special Tools PIN 316982 (516-18 8" screws) or two PIN 330278 (Propeller Shaft Bearing Housing Puller) and the flywheel puller from OMC Special Tool PIN 378103 (Universal Puller) pull the propeller shaft bearing housing from the gearcaseDiscard the O-ring from the housing7Remove the two retaining rings using OMC Special Tool PIN 311879 (Retaining Ring Pliers)Retaining rings are under" extreme pressures during removal and installationWear Lll safety glasses and proceed with care to avoid unsnapping the ring from the pliersAfter the retaining rings are removed far enough from the gearcase to clear the housi ng, release the pi iers while retaining ring is still around the propeller shaft