2009 Yamaha F40 Outboard Service Manual, Page 196Get this manual

2009 Yamaha F40 Outboard Service Manual, Page 196

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Flywheel magnet and timing belt
3 Tighten the drive sprocket nut to the specified torque

Flywheel magnet holder c: YB-06139 Driven sprocket bolt b: 38 Nm (3.8 kgfm, 28.0 ftlb) 2 Ins