Re: omc gasket.....
Hey bigdaveaz,
Another option(what I did) was hit up a website like crowleymarine.com or ishopmarine.com, search for the OMC / Bombadier / Evinrude / Johnson part number of 508235, then order it. Took them about a week to get it to me.
I shopped around for 3rd party aftermarket parts for my annual maintenance for a long time.. until I finally realized all I needed to do was find all my OMC part numbers on a parts diagram or parts catalog (on the same website) and place a big order for OEM parts. So I ended up getting official OMC stuff (or as close as I could get.) I don't think you can get OEM parts on iboats.com, but I could be wrong.