2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 136Get this manual
Lower unit
Removing the drive shaft
1Remove the drive shaft assembly and pinion, and then pull out the forward gear
CAUTION:
S68S6150
Do not reuse the bearing, always replace it with new oneBearing splitter plate 1: (commercially available) 2Remove the needle bearing from the forward gear
Drive shaft holder 1: YB-06151
Disassembling the drive shaft