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 Catalina/Capri 25/250 Sailor's Forums
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 Sinking/ through hull		  New Topic  Topic Locked
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Doug
Captain

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USA
457 Posts
Initially Posted - 07/29/2003 :  00:10:21  Show Profile
Working with a sail boat (32 ft, Non-Catalina) today that sunk in its slip. The through hull corroded through and seperated. This was a 2" bronze through hull fitting for one of the two cockpit scuppers. Notice that I said through hull, not a to hull. I guess the moral is, don't be thinking all that work you did putting in new through hulls means you don't have to inspect all those little holes through the bottom of your boat!

Doug - #1913 Noeta
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Dave B
Admiral

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Mali
863 Posts
Response Posted - 07/29/2003 :  09:31:11  Show Profile
Doug: Just curious... Was it bonded? Any detectable electrical problems? How old was the fitting?

Dave Bristle, 1985 C-25 #5032 "Passage" SR/FK/Dinette/Honda in SW CT

Edited by - dave b on 07/29/2003 09:32:48
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Douglas
Master Marine Consultant

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1595 Posts
Response Posted - 07/29/2003 :  13:33:52  Show Profile  Visit Douglas's Homepage
Glad you brought this topic up Doug. Having a full keel boat with 8 through hull fittings (bronze) Im always keeping an eye on same. Ill be hauling out this winter for maitenance on the hull. Yep every one of those suckers will be comming out for inspection and lube. Its a given if you want to sleep well.

Doug&Ruth
Triska (Alberg 29)
Tacoma Wa.
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Doug
Captain

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USA
457 Posts
Response Posted - 07/29/2003 :  20:09:14  Show Profile
We're betting there was a 110 leak somewhere. The boat had just been hauled, and had a new prop, shaft, and zinks. The prop was coated with the white zink chalk that happens with corrosion. Rest of the boat was in good shape. It was a sad loss of a very nice boat. The boat will make a great project for someone though...

Doug - #1913 Noeta
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Ellis Bloomfield
1st Mate

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USA
85 Posts
Response Posted - 08/01/2003 :  10:32:16  Show Profile
Douglas,
The tub I'm working on had seven through hulls (also bronze). With some planning I've got it down to three and am thinking about replacing them with Marelon. Very inexpensive at about $20 for a two inch and I haven't read any negative reports on them. Another boat I'm working on that is bonded, except for the shaft, has a stainless steel log that has corroded through. Stainless steel needs oxidation to maintain it's anti-corrosive properties and underwater it will corrode. Also read the other day that just parking next to a steel hull boat can set up electrolysis. Weird stuff.
Ellis
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Douglas
Master Marine Consultant

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1595 Posts
Response Posted - 08/01/2003 :  13:00:41  Show Profile  Visit Douglas's Homepage
1 Galley sink drain
2 Engine cooling water inlet
3 port cocpit drain
4 stbd cocpit drain
5 vanity sink drain
6 head sea water inlet
7 head overboard
8 deisel engine exaust
9 bilge pup drain (forgot this one)
Im not counting the knot log and depth meter, or prop shaft.

Quit scaring me. Both of my cocklit drains are 1 1/2" Marelon is good for our area but I would not us it where the boat is left in the water during a winter in areas where it freezes.

Doug&Ruth
Triska (Alberg 29)
Tacoma Wa.
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Ellis Bloomfield
1st Mate

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USA
85 Posts
Response Posted - 08/02/2003 :  15:08:47  Show Profile
Doug,
Most of the boats left in the water in this country (we do get down in the 30s below) are either slipped in open current or bubbled and Marelon would work fine for these. It's a cheap fix to get rid of the bronze. I was just reading where there can even be action between two bronzes because they may be a slightly different alloy.
Ellis
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.