I don't know if anyone has had trouble with the brass drain tubes that drain water through the transom but if you suspect they are not sealed properly or are cracked during installation you should replace them. I have a Grady White and noticed one of mine was loose and hadn't been properly flared and sealed. I am sure there are others out there with the same problem. I bought a flaring tool and replacement tubing. It was easy to do and I am sure it is now sealed better than the original. If you need the tool give me a call. It might as well be used more than once.
ozzy
ozzy