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Old 17-03-2021, 15:42   #1
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Loosen stuck seacook

Hello,
I have a big valve for the toilet exit though hull which is stuck (the boat is since 4 years on the boatyard without maintenance or attention).
Anybody has some magic products to get it going? Maybe fill it with some product and leave it for a while?
Its really bad accessible! So its not even possible to get a good strenght on the handle. Not moving nothing, atuck in open position.
Would be greatful for any recommendations and try everything.
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Old 17-03-2021, 17:50   #2
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Re: Loosen stuck seacook

What type of valve, gate, ball, or cone? What type of material, bronze, DZR, stainless, nylon? The remedies will depend on the type and material.
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Old 17-03-2021, 17:52   #3
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Re: Loosen stuck seacook

Bronze ball
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Old 17-03-2021, 17:56   #4
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Re: Loosen stuck seacook

I gave up and had a professional do it on mine. Exactly the same problem. Hope you have better luck.

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Old 17-03-2021, 19:27   #5
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Re: Loosen stuck seacook

Quote:
Originally Posted by Edelem View Post
Hello,
I have a big valve for the toilet exit though hull which is stuck (the boat is since 4 years on the boatyard without maintenance or attention).
Anybody has some magic products to get it going? Maybe fill it with some product and leave it for a while?
Its really bad accessible! So its not even possible to get a good strenght on the handle. Not moving nothing, atuck in open position.
Would be greatful for any recommendations and try everything.
Atomic Blaster .spray ,heat with airgun ,spray Repete !
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Old 17-03-2021, 19:37   #6
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Re: Loosen stuck seacook

For seacocks that are this corroded, it is quite possible that they will need to be replaced.

The reason is that the corrosion on the surface for the rotating ball abrades, and then destroys the plastic valve seats which are the parts that actually keep the ocean on the outside of the hull. A seacock that leaks when it is closed is only slightly better than none at all.

Even if you can get it to turn with a big enough wrench, are you sure it doesn't leak when closed?
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Old 17-03-2021, 23:15   #7
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Re: Loosen stuck seacook

I suspect that if you must pay someone to do the free-up it would be far cheaper (and better) to simply replace the ball valve. The chances of the freed-up valve being still in good shape are slim IMO.

FWIW, I've never been successful in repairing any ball valves... even when only stiff to operate and not frozen.

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Old 17-03-2021, 23:18   #8
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Re: Loosen stuck seacook

First off, I hope that you are still out of the water. Secondly, replace it.
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