Yamaha F100B F100C Outboards Factory Service Manual, Page 139Get this manual
Cylinder body 3Install half of the bearings (grooved bearings) and the crankshaft into the cylinder body 25Install the remaining half of the bearings (plain bearings) into the crankcase
S60C5925
6Install the crankcase onto the cylinder body and apply engine oil onto the threads of the crankcase boltsS60C5910
CAUTION:
Install the bearings in their original positionsNOTE: Install the unified thrust bearing at the position shown4Put piece of Plastigauge (PG-1) on each main journal parallel to the crankshaft