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Old 10-14-2015, 03:33 PM   #7
DavidM
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City: Litchfield, Ct
Join Date: Aug 2012
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The stem has a flat end like a screw driver that fits into a slot in the ball. That flat end has probably worn/corroded off so the ball isn't turning. So it looks like you have two problems, a buggered stem and some blockage under the valve like jelly fish.

I would first go through the boat and look for thru hull valves with similar problems, corrosion, etc. Make a list of those that need replacement and order replacements or real seacocks. Then haul the boat and have them all done, either in the sling or on jack stands if more than one or two need to be done.

I had a big 1-1/2" seacock fail and it was replaced while hanging on the Travelift sling. Took two guys about an hour to do it. The ball valve body threads were shot and it fell apart in my hands.

David
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