1991 Yamaha Outboard Factory Service Manual 9.9 and 15 HP, Page 89Get this manual
Bearing housing and propeller shaft 1Remove the oil drain plug and oil level plug and drain the gear oil2Remove the propeller, remove the two bolts securing the gear case cap, and remove the gear case cap and propeller shaft Pinion gear, drive shaft and shift rod 1Using the torquing tool and wrench, remove the pinion nut and then remove the pinion, thrust bearing, shim, and drive shaft2Remove the bearing housing3Remove the bracket securing the shift rod and then remove the shift rod