In case anyone else is new to this style boat...The cooling water sits in the block after you pull the boat out of the water. If you park it for the winter like that, the block or manifold is likely to crack from the freezing.
I have an exterior crack in my engine, on the side under the manifold. I am going to try and the JB Weld repair of gluing up the crack (cleaning it out first with a mini rotary grinder). Question is, what kind would be best for this (cast iron)? Stick putty, or liquid gel, or another brand...