2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 186Get this manual
IpOWRIIfriJ: IPower unit 5Install the piston with the "UP" mark on the piston crown facing towards the flywheel7Set the crankshaftand oil seals and into the cylinder body as shownApply engine oil to the inner oil seal, journal bearings, and connecting rod bearing
S62Y5A70
[6] For USA and Canada [ill For worldwide
Apply engine oil to side of the piston assemblyPiston ring compressor: YU-33294 Piston slider: 90890-06529 6Install half of the bearings inder body )Install the connecting rod cap to the connecting rod, and then tighten the connecting rod bolts to the specified torques in two stagesApply engine oil to the connecting rod cap and connecting rod bolt