Two possibilities:

1. It's possible that any loose wiring near the sheave at the top of the
mast is getting pulled into the sheave. It happened to me, and I had to
splice all the wires at the masthead. Try pulling the halyard back down.
Even a little will help. Then tension the wiring from where it exits the
mast (probably inside the cabin where the mast enters the cabin). Finally
try hoisting again.

2. If your halyard is twisted around another halyard, it won't be able to
move. Try loosening any other halyards, and then try to move the jib
halyard up or down.

If neither of those suggestions work, you'll have to go up the mast to see
where the problem lies, or drop the mast.

In either case, don't try to force it. You could make matters worse. It
shouldn't take much more force than you usually apply, to resolve the
problem.

Alan Bergen
35 Mk III Thirsty
Rose City YC
Portland, OR

On Fri, Jul 5, 2019 at 8:11 AM Paul via CnC-List <cnc-list@cnc-list.com>
wrote:

> Hello listers,
> One of my 2 wire-rope jib halyards got “stuck” doing a pre-start sail
> change before a race last week. Wind was 18 knots and gusting so the sail
> was flogging around a bit. Water was pretty flat due to offshore breeze so
> not a lot of pitch/roll action of the boat.
> Most of the wire is exposed (shackle is about 4 feet off the deck). I
> initially thought that the wire might have jumped the sheave but a trip to
> the masthead revealed nothing - sheave turns smoothly and cable is not
> fouled at the mast head fitting.
> Am unable to budge the halyard up or down, but there is a tiny amount of
> play when changing direction of pull (maybe an inch or so).
> A cable conduit was installed 2 years ago but there have not been any
> issues to date relative to the running of internal halyards.
>
> Currently using the spin halyard as an alternative (the other jib halyard
> runs through a restrainer for the furler swivel and the luff on the #1 is
> too long to fit the furling  gear.
>
> I’m wondering if the catch is happening near the top where the
> wire-to-rope transition is.  Perhaps at the upper shroud toggles?
>
> Has anyone encountered this before and resolved without pulling the mast?
>
> Add put a line on the shackle and run it through a snatch block at the
> stem head fitting and back to a halyard winch and give it slightly stronger
> pull than just arm strength?
>
> Thanks
>
> Paul D. Saxton
> C&C 29 MK I
> Boomerang
>
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