Finally got that old hose off with a hacksaw and a fair amount of
flame. Problem is, I STILL haven't found the blockage! I usually find that
if the blockage is in the thruhull, opening the valve with the hose off
gives a blast of reverse water that clears it. This time, NOTHING! not a
trickle.



Update: I got my Lady to dive in and bang away at it from the outside (no
sign of barnys or other growth). She confirmed what I suspected: she hit
something solid, as I did when I was poking with a wire from the inside.

The valve is stuck closed, and the lever is broken.

Do you have someplace local that will let you do a haul & hold? If you
have all the parts and supplies in hand (including a new thruhull) you
should be able to fix it in the slings. Buy every part you can think of
-- heck buy two -- and return what you don't use.

I would suggest not putting off a haul -- if the seacock is as knackered
as you describe, what else is about to let go?

dave