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Old 12-18-2009
Tempest Tempest is offline
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I'm not aware of a way to unstick a frozen "open" seacock safely, while remaining in the water.

Somehow you need to get a rust/corrosion disolving solution into the valve, how you do this, without removing the attached hoses and clamps I don't know. Maybe someone else does?

I would haul the boat even if it's for a short time, remove the hoses, loosen the valves, remove the stems, clean, lube and replace them. While you are at it, I'd check the hoses and replace the clamps.
Sabre 34
Morgan, NJ
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