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Catalina/Capri 25/250 Sailor's Forums

Catalina 25 Specific Forum

corroded threads on keel attachment

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Merrick
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USA
192 Posts

Initially Posted - 04/01/2009 : 08:13:55

Dropped the keel for inspection and looking up into the holes, it appears the threads on two are corroded. It's really difficult to get a good look. I'm not seeing clean metal for sure. There is some reddish material around the outside - rust?. We did locktite on them last year, don't know if that causes discoloration, but did notice one bolt came out too easily for comfort. I'm not sure we did the primer before the locktite last year,but suspect not as we were hurrying to get the boat in the water.
I see CD sells the attachments that are embedded in the hull, so I assume someone has replaced them . Anyone have experience with that?
Any idea on cost?
Right now with what I see I can't trust that there is enough metal there to reassemble, unless somehow I can clean it and see some shiny metal.
Any suggestions appreciated.

1981 #2555 "Aero"
sk/sr
Coosaw Island, SC

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tinob
Master Marine Consultant

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USA
1883 Posts

Response Posted - 04/01/2009 : 09:16:56

I seem to remember someone, Leon Sisson perhaps, who drilled through the hull and through bolted the keel hinge. The archives may produce the event detailing the procedure.

CD may have the torque setting for the bolts and if you could produce their max setting without stripping the threads it's a go. If it strips well we know where to go next.

Val on the hard DAGNABIT, #3936, Patchogue, N.Y.

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txbigfoot
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USA
194 Posts

Response Posted - 04/02/2009 : 02:59:50

I bought the all thread from Catalina direect and the kit for my cast iron keel. I would be happy to sell you my kit and about 2 feet of the all thread. It is the super expensive stainless stell kind and the appropriate drill bit to allow you to tap threads for it
Dan

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Merrick
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192 Posts

Response Posted - 04/02/2009 : 10:02:54

Dan I'm not clear on what the "all thread" is. I searched CD but didn't find anything. Did you have the same problem? How did you fix?

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Merrick
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192 Posts

Response Posted - 04/02/2009 : 10:06:04

I've been reading old threads but not finding this particular problem. If anyone could point me to past discussion I would appreciate.

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dmpilc
Master Marine Consultant

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USA
4593 Posts

Response Posted - 04/02/2009 : 17:54:25

All thread is a long rod, anywhere from 1 to 6 or 8 feet in length, the entire length of which is threaded on the outside. I bought 4 pieces at HD, about 2 ft long, last year when I thought I might have to drop the keel. The all thread keeps the keel lined up with the hull as you drop the keel and raise it up again. One procedure involves removing one of the four keel bolts and putting the all thread, with washer and nut in its place. Snug it up , then do the same with the other three bolts. Then gradually back off all four nuts, a turn or 2 on each one at a time until you have the keel down enough to work on the hull. With the help of a floor jack, the process is reversed to reinstall the keel, using new bolts and Locktite. It also helps to make a frame or dolly out of 4x4's to hold the keel while it is down.

Edited by - dmpilc on 04/02/2009 17:55:32

txbigfoot
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USA
194 Posts

Response Posted - 04/02/2009 : 18:06:52

The all thread I have is not for swing keel boats but for a fixed keel boat so you can put new keel bolts in. Hope that will help clarify my earlier post.

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Prospector
Master Marine Consultant

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Canada
3159 Posts

Response Posted - 04/02/2009 : 18:42:46

I think "All Thread" is also sold as "Threaded Rod" you should be able to get it at "Metal Superstores" or an industrial supplier if your local hardware store doesn't stock it.

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Merrick
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USA
192 Posts

Response Posted - 04/02/2009 : 19:53:01

I guess I'm not explaining my problem too well. I have the swing keel down and have removed the pin hangers that are held on by the four small bolts. What I'm concerned about is the condition of the stainless steel attachment threads embedded in the hull. Two of them look to be corroded. I'm going to clean them out and get a better look, but right now I don't think they look too trustworthy so I'm wondering if they were corroded to where they couldn't be trusted to hold up the keel, what would I do about that.....CD sells the parts, but it would involve some significant fiberglass work to cut out the old ones and replace them. So I was wondering if anyone has any experience with that or any ideas how to resolve the problem. Sorry for not being clear on where the problem is.

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Ed Cassidy
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USA
365 Posts

Response Posted - 04/02/2009 : 21:14:50

Early on Val said to torque the bolts and see. Reinstall the castings without the keel and tighten down the bolts to the recommend torque. (If you can't get the torque value from Catalina, Google 'bolt torque' to find the correct value) If you can do that, you are fine. If they strip while doing that then you need to proceed with a fix. The easiest and quickest will be to drill out the remaining threads and install new threads. The new threads are called helicoil inserts. Very easy to install and as strong as new. Search helicoil or heli-coil and you'll find tons of 'how-tos'. Good luck.

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Merrick
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USA
192 Posts

Response Posted - 04/09/2009 : 16:30:54

The owners manual said torque to 35lbs which I did so I guess it's ok or at least I hope. Still kind of worries me . Hate to drop a 1500 lb. anchor unexpectedly.

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