military bidge boat the transom has no angle what is the best way to attach outboard?

[o2bfishn]

I have a military bridge boat that is 19 feet long 7 feet wide and 24 inch deep at the transom. Plus the transom is 90 degrees.
These boat were designed to be a float bridge. 2 boats bolted together by the transom and bridge road bed attached on top. If you have seen the movie "kelly's hero's" starring Clint Eastwood they drove a tank over one.
The problem I have is: What is the best way to put a motor on the back with such a steep angle and height.
I have attched some pictures from a Vietnam web site that shows 2 50 horse power motors on it.
Thank you for your idea's

[marshmat]

Well, first of all, welcome to bd.net

Most outboards you find now will probably be set up for a transom raked aft around twelve degrees, give or take a few degrees. Sterndrives are in the same ballpark; jet drives are generally available in 0 or 5 degrees.

Depending on the outboard, its lowest trim setting might give an acceptable thrust line (ie, near parallel to the bottom) with the current, 0-degree transom. Other outboards might trim out too much even fully tucked in. If that's the case for your chosen setup, probably the easiest solution would be to fabricate a setback bracket at a suitable angle, bolt it to the transom, and clamp/bolt the outboard to the bracket. In steel this could be done for less than a hundred bucks if you can cut/weld it yourself; fibreglass is also an option. This way, you don't compromise the original boat (esp. its structural integrity) at all, and you have more freedom to optimize the motor placement.

[charmc]

Welcome aboard!

A setback mounting bracket is probably your best bet, allowing you maximum flexibility. Matt has summarized the details very well.

Good luck with your project.

[Lt. Holden]

Does it have the M-60 on it, Cool!