2001-2014 Honda BF/BFP8D, BF/BFP9.9D Outboards Shop Manual, Page 341Get this manual
BF80-BF9.90 6) Remove the spool valve cap using commercially available driver bit 2.8 mm 7) Apply small shot of air pressure to the oil hole in the spool valve cap to remove the valve BRemove the valve from the spool valve cap8) Remove the O-rings from the spool valve cap and valve and discard them Replace the O-rings with the new ones during reassembly SPOOL VALVE CAP