Sea Cocks - SailNet Community
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post #1 of 8 Old 4 Weeks Ago Thread Starter
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Sea Cocks

Anyone seen one of these?
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post #2 of 8 Old 4 Weeks Ago
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Re: Sea Cocks

If you are sailing a Bristol, most of the OEM seacocks were manufactured by Spartan Marine in Georgetown Maine.

If you want to replace the broken handle, you may find what you need here:

https://www.spartanmarine.com/all-pr...adapters-parts
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post #3 of 8 Old 4 Weeks Ago
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Re: Sea Cocks

The logo on the handle is Wilcox-Crittenden's.

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post #4 of 8 Old 4 Weeks Ago Thread Starter
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Thanks guys. Trying to track down why they might be frozen/stuck and if there is hope for getting them moving again. In water versus/hauled etc. Now I have a plaxe to start researching!
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Re: Sea Cocks

Can't see the valve itself well in the picture, but it is likely a tapered plug valve. If so, these often get sticky or stuck, but they are usually easy to remedy. You will need to free it and remove it, then use some lapping compound like that for valves, and work it back and forth to smooth things out. After that, a bit of grease and it will work easy again. After that, every so often when it is on the hard, regrease. Some people have put zerk fittings in them to grease while in the water.

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post #6 of 8 Old 4 Weeks Ago
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Re: Sea Cocks

One strategy that has worked for me when they are really stuck is inserting a tapered plug outside the hull, removing the hose and then filling the seacock with a penetrating oil like Marvel Mystery Oil and letting it soak for as long as necessary. Be careful not to pound on these too hard as you can crack the casting. The barrels are usually matched to the valves, so you can't just replace the barrel, you have to replace the entire through hull if that happens. The trick to keeping them from sticking is to lubricate them regularly. A good coat of seacock grease can also seal them up if they are weeping a bit.
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Re: Sea Cocks

I went through the same thing last spring on my 29.9. Take that handle off (the thumb screws are certainly not original, and probably corroded) and get as long a wrench as you can fit on there. If it valve is really stuck, you'll just break the handle off anyway.

Gentle heat from a torch can help... (As can penetrating oil, as previously mentioned)

Have you loosened the jam nut and the flange nut on the other side of the valve from the handle?

Study MaineSail's article : https://marinehowto.com/servicing-ta...cone-seacocks/

In the end, I had a really big guy from the yard on a really big wrench break it loose...and smash his elbow when it gave way.

Incidentally they get stuck from lack of exercise and lack of service.

I was happy to be doing that while hauled. It can certainly fail under the strain...
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post #8 of 8 Old 1 Week Ago Thread Starter
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Thanks for all the tips. Something to work on next spring..(boat hauled). Going to try disassembly, oil, the works...
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