1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 198Get this manual
COB1275
13Using punch and mallet, drive out the taper pin from back to front of the crankcase14Remove the crankcase to cylinder block six main screws and two nuts Also remove the remaining smaller screws15Tap the crankcase with soft mallet to break seal between the crankcase and the cylinder block16Lift the crankcase from the cylinder blockDiscard the two crankcase seals17Use 516 inch, 12 point socket to remove the connecting rod screwsRemove the rod caps and the needle bearing assembly
INotel Pistons,
connecting rods, and needle bearing assemb lies are wearing parts and seat with the operation of the motorBecause of this, it is essential to maintain their original positions at reassemblyMark each connecting rod and cap, piston, and needle bearing assembly to assure correct mating when they are removed, and keep the needles of each cylinder togetherCOB1277