2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 136Get this manual

2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 136

Cylinder head
E S6AG5340 S6AG5380

7Check that the keyway in the camshaft is aligned with the mark on the cylinder head as shownAdjust if necessaryE

S6AG5390 S6AG5350