2009 Yamaha F40 Outboard Service Manual, Page 262Get this manual
Drive shaft and lower case 6Tighten the pinion nut to the specified torquel k
4Install the forward gear assembly5Install the drive shaft assembly h, the pinion i, and the pinion nut j
Drive shaft holder k: YB-06079 Pinion nut holder l: 90890-06715 Pinion nut: 74 Nm (7.4 kgfm, 54.6 ftlb)