2009 Yamaha F40 Outboard Service Manual, Page 253Get this manual
Lower unit
Assembling the propeller shaft housing assembly
Do not reuse the bearingAlways replace it with new one1Install new needle bearing into the propeller shaft housing to the specified depth
Install an oil seal halfway into the propeller shaft housing, and then install the other oil seal3Install the original shim(s) (T2) and new ball bearing onto the reverse gear h
Bearing inner race attachment i: 90890-06639
Driver handle (large) b: YB-06071 Bearing housing bearinginstaller c: YB-06111 Installation depth a: 3.03.5 mm (0.1180.138 in)