2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 132Get this manual
Lower unit Propeller shaft oil seal installer 3: YB-06269 Driver handle (large) 4: YB-06071 Depth c: 5.0 0.5 mm (0.20 0.02 in) 3Install the thrust washer and new ball bearing to the reverse gear using press
Assembling the propeller shaft housing
1Install the needle bearing into the propeller shaft housing to the specified depth
NOTE: Install the needle bearing with the manufacture identification mark facing toward the oil seal (propeller side)Driver handle (large) 1: YB-06071 Bearing housing needle bearing remover 2: YB-06153 Depth b: 25.25 0.25 mm (0.99 0.01 in) 2Apply grease to the new oil seals, and then install them into the propeller shaft housing to the specified depth