Hello I have a 1969 16ft tri hull outboard. floor was rotted so replaced. Put in water today only to find out when we gave it the throttle the water came in. Pulled the boat and it has a crack right at the bottom of engine mount. As long as the engine mount bout nine inches. Looking at it from the inside looks like plywood that was sprayed with a texture material. I can see the crack. Question is is it fixable or not and what kind of work? Thank you