2001-2014 Honda BF/BFP8D, BF/BFP9.9D Outboards Shop Manual, Page 350Get this manual
Quality of the image is intentionally reduced!
BF80-BF9.90 8) Apply ATF to new O-ring, and install it in the lower groove in the outer tube9) Apply ATF to the new dust sealHolding it with your fingers so that it shapes "U" and install it in the up