Re: Do You think this is Safe to have on the water. Please Rate, VIDEO INSIDE.
Re: Do You think this is Safe to have on the water. Please Rate, VIDEO INSIDE.
I agree that you will have to take some core samples, but I would use the 1/4 inch bit and go about 1 - 1 1/2 inches deep. Wrap some masking tape around your drill bit at that depth and drill into the inside of the transom from inside the engine compartment. make several holes around and below the waterline near the drain, and around the transom assembly. Dry light colored shavings are good, and if that's what you get, then you can fill the holes with some thickened resin or "Peanut Butter". If the shavings are wet and dark, or look like compost, then start reading up on transom replacement.
I'm going to hazard a guess that the cracking you see on the inside of the transom is caused by the wood inside the fiberglass swelling due to water intrusion, and that will most likely lead to rot. What year boat? Make, model etc... That would be helpful...