2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 122Get this manual

2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 122

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Timing belt and sprocket

NOTE: Make sure that the driven sprocket does not turn when tightening the driven sprocket bolt
NOTE: Use deep 41 mm socket to tighten the drive sprocket nu