Probably not. I assume that's polyester resin. That can't be used by itself. You'd need to add fiberglass mat. Epoxy resin can be used by itself but you'll likely need to order it from somewhere like u.s. composites or clark craft.
B King, I had a 1967 big twin 40 that ran forever. The electric and pull start saved me on a few trips. A guy in the Gregory area had several of them and restores old Johnson/rudes. I think you did well for an old running 40, I'd have bought it. If you need web-sites for parts PM me, I have a 71 Johnson 40 and I keep the places that still sell parts on file.
