Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 206Get this manual
LOWR SERVICE POINTS.6-18 Pinion and forward gear removal 6-18 Lower case disassembly .6-18 Pinion and forward gear inspection.6-19 Drive shaft inspection .6-20 Bushing inspection6-20 Shift cam inspection6-20 Bearing inspection.6-20 Lower case inspection.6-20 Lower case assembly 6-20