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Replacing spin halyard sheave
#9397
04/23/10 04:06 PM
04/23/10 04:06 PM
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Joined: Oct 2009
Posts: 42 Seattle, WA
gmo
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Senior Member
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Joined: Oct 2009
Posts: 42
Seattle, WA
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I'm looking to replace my spin halyard and sheave. Does anyone know the sheave and pin dimensions? Has anyone tried pulling out the jib box with the mast still up?
Slingshot is a '79, and I'd guess the box is near original. There are two wire jib halyards, and one rope spin halyard.
Thanks, Grady
Grady Morgan Slingshot - Hull #112
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Re: Replacing spin halyard sheave
[Re: gmo]
#9429
05/02/10 09:44 PM
05/02/10 09:44 PM
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Joined: Oct 2009
Posts: 42 Seattle, WA
gmo
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Joined: Oct 2009
Posts: 42
Seattle, WA
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Thanks Bill. That is is the same Jib box I have. Rig-rite is now selling part K-11597-1 as a replacement, which they claim is much lighter. Do you have any idea how much yours weights?
With the existing sheaves being riveted in, you can drill the rivets out and replace them with cleaves pins.
Looks like we're pretty much stuck with rig-rite for the replacement sheaves. The sheaves are 31/64" wide, and 1/2" looks to be too fat to fit. I'm probably going to get the Nylatron replacements for the spinnaker and jib halyards.
I had a crazy idea to try and replace it with the stick up, but I've been told this is a bad idea, so I'm going wait until this summer, and do it when I drop the mast to inspect it.
Grady Morgan Slingshot - Hull #112
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Re: Replacing spin halyard sheave
[Re: whitedolphin]
#9492
05/07/10 10:15 AM
05/07/10 10:15 AM
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Joined: Apr 2003
Posts: 649 Marblehead, MA
dbows
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Joined: Apr 2003
Posts: 649
Marblehead, MA
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I almost bought it last year but you have to change your forestay length to make it work. I think the pin is about 1" different than the old version. I do not remember if it is longer or shorter. So this ment futzing with my roller furler extrusions etc.
From what I remember it is quite a weight difference, particularly when it is 30 feet above the deck.
DB
David Bows Mallorca - Hull# 397 ~~~~~_/)~_/)~~~~_/)~~~~~~~~~~~~~~~~~~~~~~~~~|~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|~~~~~
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Re: Replacing spin halyard sheave
[Re: gmo]
#9500
05/07/10 06:15 PM
05/07/10 06:15 PM
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Joined: Oct 2009
Posts: 42 Seattle, WA
gmo
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Senior Member
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OP
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Joined: Oct 2009
Posts: 42
Seattle, WA
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The new one is $497. from the site: When replacing this item with the new K-11597-1 (the mast cutout needs to be widened and extended downward), the Forestay pin will be 1" higher on the mast; the forestay length will change accordingly. How does this effect the class rule on forestay length? I think mine (with the old box) is at the class max. This doesn't indicate whether the hoist height changes for the jibs.
Grady Morgan Slingshot - Hull #112
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