Yamaha F100B F100C Outboards Factory Service Manual, Page 161Get this manual
Propeller shaft housing (F100B) Depth c: 24.7525.25 mm (0.970.99 in) 2Apply grease to the new oil seals, and then install them into the propeller shaft housing to the specified depthNOTE: Install the ball bearing with the manufacture identification mark facing outward (propeller side)Bearing inner race attachment 9: 90890-06661 4Install the reverse gear assembly to the propeller shaft housing using press