Yamaha Outboard Motors Factory Service Manual F6 and F8, Page 304Get this manual
CRANKSHAFT, PISTON AND CYLINDER BODY INSTALLING THE PISTON AND CONNECTING ROD
1Install: Piston and connecting rod Piston slider: YU-3329490890-05158
Install the piston with "UP" mark on the piston crown facing toward the flywheel side2Install: Connecting rod cap
Align the "" marks on the connecting rod and cap when installing
INSTALLING THE OIL SEAL