2001 340 Sundancer Transom Leak Conundrum

[Captain Spike]

Well, I wanted to share the epilogue on this. After reglassing the hull/tube area and drilling out the existing bolt holes, filling with epoxy and then drilling new ones, we reinstalled the exhaust ports.

Since this was a repower in which we replaced the engines and the log style exhaust with the water lift muffler design, I can't say whether it was something we did that caused this problem in the first place.

One of the things I noted in our original design is we used a short piece of 5 inch hose to connect the exhaust tubes to the tube coming across and down from the mufflers on each side. I'm thinking that using regular exhaust hose at the joint may not have sufficiently isolated the tubes from vibration, as well as the moment arm of the tube above. We therefore added flexible, silicone joints on each side. Also thinking about securing the horizontal portion of the 5 inch tubes to the engine room ceiling. Pics below

https://www.amazon.com/photos/shared/Rx_Didw4QKqGEG-KaWpRgA.a0gIDcBeoWaQR4LKe_Efow


In any event the bilge is now DRY. As such we correctly identifies the problem. Water and exhaust migrating from the tube/hull interface, through the fiberglass and out at two spots on the inside of the transom. Those two spots are now dry!

Thanks for the update. I think we all learned something new, and glad you are solid & seaworthy again!

 

[Strecker25]

Nothing better than a dry bilge. Well done!