1996-2006 Yamaha 115-140HP Outboards Service Manuals, Page 978Get this manual
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DRIVE SHAFT (REGULAR ROTATION MODELS)
Tighten: Pinion nut
Drive shaft holder YB-0620190890-06520 Pinion nut holder 90890-06505 Pinion nut holder attachment 90890-06507 Pinion nut 95