1998-2006 Yamaha F20/F25 Outboards Service Manual, Page 241Get this manual

1998-2006 Yamaha F20/F25 Outboards Service Manual, Page 241

I FORWARD GEAR AND DRIVE SHAFT
2Install: Forward gear (along with the tapered roller bearing) Pinion gear Pinion gear nut

Pinion gear nut: 50 Nm (5.0 kg, 36 ft Ib)