2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 206Get this manual
Lower unit
NOTE: Apply engine oil or grease to the needle bearing, and then install it5Install the new needle bearings into the reverse gear to the specified depthCAUTION:
Add or remove shim(s), if necessary, when replacing the forward gear or lower caseForward bearing installer 3: YB-06430 Driver handle 4: YB-06071 3Install the needle bearing outer case into the lower case
Needle bearing installer 8: YB-06435 Driver handle 9: YB-06071 Depth b: 20.7521.25 mm (0.8170.836 in) Depth c: 4.254.75 mm (0.1670.187 in) 6Install the thrust bearing and reverse gear into the lower case