2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 182Get this manual
Lower unit
5Install the washers 7, wave washer 8, spacer 9, and collar to the drive shaft
2Install the new gasket 2, outer plate cartridge 3, and dowel pins 4
NOTE: The collar and spacer should fit together firmly While pulling the drive shaft up, install the collar with an appropriate tool that fits over the drive shaft as shown6Install the O-ring and insert cartridge into the pump housing C