Yamaha F100B F100C Outboards Factory Service Manual, Page 170Get this manual
Lower unit
NOTE: When installing the pump housing, apply grease to the inside of the housing, and then turn the drive shaft clockwise while pushing down the pump housing Align the cover projection with the hole in the pump housing
6Install the O-ring and insert cartridge into the pump housing C
Installing the lower unit
S60C6075
1Set the gearshift to the neutral position at the lower unit
NOTE: Align the insert cartridge projections with the holes in the pump housing7Install the O-ring and pump housing assembly into the lower case, tighten the bolts F, and then install the seal and cover H