Jim, When I sent my Atomic Four to "atomic-four-heaven" and converted to an outboard I used two layers of sealed 1" thick plywood on the inside of the full width of the transom and two layers of 3/4" star board on the outside. On the outside you're going to want a backing plate that stiffens the transom to as close to the water line as possible because that is where the most deflection of the fiberglass will take place. The starboard bends a little but it seems to do the job. I mounted an electric start 9.8hp Nissan (Tohatsu) 2 stroke with a 25 inch shaft. It weighs about 125lbs. I like the simplicity of the outboard although maneuvering with it in tight quarters creates more challenges than the reckless bumper car style abandon I was able to embrace with the A4.
I would take a picture of how I have it set up but my boat has become a mythical vessel that I only see on rare occasions. Dan Hardiman C27TR #4149 Back Creek Annapolis MD --- On Mon, 3/29/10, Jim <[email protected]> wrote: From: Jim <[email protected]> Subject: [IC27A] Outboard motor mount backing plate To: [email protected] Date: Monday, March 29, 2010, 1:06 PM Hello, I recently purchased a new Suzuki 9.9 to mount on the back of my Catalina 27. It is a very heavy engine about 150lbs. I was wondering if it would be reccomended to have a stainless steel backing plate made or if I will be ok to use a thick piece of wood as the backing plate for the motor mount? Thank you in advance, James Lawhun
