Have a small hole in the water jacket of my atomic 4 gas engine. How to
patch ? I've drilled it and it will now It will take a 3/8 bolt. I've
thought of placing a large washer and the bolt in the hole, using a gasket
maker like Permitex or RTV to seal it, and then perhaps to cover it with
something like JB Weld - any thoughts ?

Have a small hole in the water jacket of my atomic 4 gas engine. How to
patch ? I've drilled it and it will now It will take a 3/8 bolt. I've
thought of placing a large washer and the bolt in the hole, using a gasket
maker like Permitex or RTV to seal it, and then perhaps to cover it with
something like JB Weld - any thoughts ?

That might work, but why not send this question to the Q&A at..

http://www.moyermarine.com/about.htm

RB