I have finally found the dimension of the Yamaha 8hp outboard when it
is fully titled up. It takes close to 11" from the edge of the
transom inward toward the bow. This means I must remove those two
boxy structures at the stern of my boat; otherwise, the outboard would
not have room to tilt up, or I would have to mount it higher than
where I want it to be.

I found the info in www.shipyardisland.com -- not through their home
page, but from a search engine (Yahoo).

Hope this info is useful to someone.

Jay Chan