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Author Topic:   Needless concern about water in the hull
noswah posted 12-23-2001 07:51 AM ET (US)   Profile for noswah   Send Email to noswah  

After leaving my Montauk tilted (bow up stearn down) for 5 months I was finally ready to drill a hole in the bottom and drain the water out. I had decided to drill 5 inches in from the transom and 1 inch over from the keel.

Next, I went and got a couple buckets as I wanted to see how much water would drain out. After positioning myself under the boat I began to drill this hole that I had been so concerned about.

To my surprise not one drop of water came out of this 29 year old hull. I mean the drill wasn't even damp or have any signs that moisture was present. Now I can epoxy the hole and concentate on finishing this project. Has anyone else had this concern? I think water in the hull might be exagerated. Does anyone else?

Happy Holidays to everyone.

dfmcintyre posted 12-23-2001 08:26 AM ET (US)     Profile for dfmcintyre  Send Email to dfmcintyre     
I think that some water in the hull, over the years is just about unavoidable. But the amount, as you just experienced can vary due to the age of the hull, and how it's been cared for (inside vs outside storage, covered or not, well sealed and maintained through hull fittings) and the type of hull.

While working on my project 21' Outrage, I found out, to my dismay that the through-transom holes for previous engine installations were not well waterproofed. Poor or non-existant bedding techniques allowed just enough water to enter and rot the transom.

How much water was/is needed? I sure don't know, but I do know that it cost me an extra four grand + for the repair.

I've also found that the drain holes running from the anchor locker cover channel were just drilled through the foam, and not sealed in any particular way. I don't think, back in the late 60's or early 70's they had as much concern about water penetration as we and the factory do now.

I've always believed that it's closed cell foam, i.e. the water can't get into the cell. But can it migrate around the cells and settle into the bottom of the hull, is the question I'd like answered.

Best - Don

jimh posted 12-24-2001 02:06 PM ET (US)     Profile for jimh  Send Email to jimh     
Last summer I pulled off an old SONAR transducer that was mounted at the Vee of the keel on the transom. It was a rather large unit and had four big mounting screws. I was expecting to see some water come out, but not a drop appeared from the screw holes.

Eventually I removed all of the cable clamps and other hardware associated with this installation, and finally got a single drop of water out of one of the holes. The boat had spend most of the past three years in the water, so I guess those fittings were properly sealed.

Sometimes it does not take much. On selling his ten-year-old boat (28-foot Carver) my friend found he had a poorly sealed screw in a navigation light fitting. The fixture collected water which then seeped into the wood-cored deck. It took about $ 3,000 to fix this before the buyer would accept the boat. That was an expensive bit of sealant that was omitted in the original installation of that fixture!

ECUSeaPA posted 01-03-2002 08:35 PM ET (US)     Profile for ECUSeaPA  Send Email to ECUSeaPA     
I drilled virtually the same hull on my '85 18 OR that had spent a lot of its life in the water. Like you I was ready with the bucket to see how much water I collected. Not a single drop! What year did BW go to the "closed cell'??
ECUSeaPA posted 01-04-2002 10:08 PM ET (US)     Profile for ECUSeaPA  Send Email to ECUSeaPA     
Drilled the same "hole" not "hull" even though I did drill the "hull"

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