1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 239Get this manual
2Position the crankcase on the cylinder block, using care to avoid damaging the crankcase heads O-ringsRotate the crankcase heads to their correct position3Using punch and mallet, install the two taper pins4Install the main bearing screws and smaller screws finger tight5Install the upper and the lower crankcase head screws finger tight6Remove the cylinder heads (if installed)Check for binding between the crankshaft and the bearings or the connecting rods by rotating the crankshaft with the flywheel7Tighten the main screws to torque of 24-27 Nm (18-20 ftIbs8Tighten the smaller screws to torque of 7-9 Nm (60-84 in.lbs E u