Yamaha 115-225 HP Outboards Service Manual, Page 117Get this manual
_ YB-34454
9) Insert each piston into the original cylinder using special tool
Pistons embossed with "P" and "8" belong to port and starboard cylinders respectively
10) Lubricate crankshaft center bearings and connecting rod cap bolts with stroke outboard motor oil11) Install the caps in their original positions by tightening all bolts in two steps to the torque specifiedLoosen them by 12 tums and tighten to the specified torque againReversed cap will not fit to the rod