So maybe this is not the correct way, or the best way to repair a soft spot in a boat floor but i was not comfortable cutting the complete floor out. My floor is solid, all except on the starboard side of my console. I believe that over the years, the water has found its way into the cut in the floor, under the console that the wiring is fed through. So I removed that section cleaned the gelcoat/fiberglass top form the rotten wood, replace the wood and reattached the top. I added expanding foam under my new wood and I am very happy with my results. For my first time working with fiberglass repairs I think it came out great and is very solid. Maybe someone else has a similar issue and this can help.
