1996-2006 Yamaha 115-140HP Outboards Service Manuals, Page 127Get this manual
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ASSEMBLY AND INSTALLATION
3 Install:Claw washer CD -Ring nut
Ring nut: 145 Nm (14.5 m-kg, 105 ft-Ib) Ring nut wrench: Y8-34447,90890-06511 Extension: 90890-06513