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post #1 of 36 Old 09-27-2018 Thread Starter
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Simpson Lawrence gypsy not matching chain

We have an SL Horizon 1000 with a 3/8 Gypsy. Recently we replace the chain with G4 and we are having problems with the chain not fitting the gypsy properly. After every 4 or 5 links pass through, it jumps, skipping a link. The previous chain was G4 also. The manual indicates either BBB or HT (which is G4). Has anyone else had a problem with new chain not matching their gypsy? Is it a problem to have it skip? I'm afraid it's going to damage the windlass and with 250' of chain and a 46' boat I'm not keen on hauling it in by hand!
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post #2 of 36 Old 09-27-2018
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Re: Simpson Lawrence gypsy not matching chain

The link size is different between G4 and BBB, so there seems to be a mismatch. Many windlasses can interchange the wildcat (the part that grabs the chain) for different sizes and types of chain. Perhaps the manual is suggesting you could fit either wildcat, but I don't think it's trying to say it will do either universally.

You say you previously had G4 chain as well. Did it skip then too? I've heard rumor of mislabled chain, perhaps you have a BBB wildcat. Perhaps its not for 3/8 chain at all.

Just guessing. Bottom line, you don't want it constantly jumping, as you describe.


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Re: Simpson Lawrence gypsy not matching chain

It sounds as though your previous chain was BBB. Are you absolutely positive it was G4?
The chains are very different (link length and links per foot, hence weight per foot) and the gypsy is not interchangeable. BBB is specifically manufactured as anchor chain, while G4 is not, though it is used as anchor chain by many.

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Re: Simpson Lawrence gypsy not matching chain

Quote:
Originally Posted by capta View Post
....... BBB is specifically manufactured as anchor chain, while G4 is not, though it is used as anchor chain by many.
Thatís interesting. Canít you explain this more thoroughly? I know G4 is heat treated, which is different, but I wasnít aware of itís lack of applicability. Seems odd, as windlass are designed for it,
and everyone markets it as anchor chain.


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Re: Simpson Lawrence gypsy not matching chain

Quote:
Originally Posted by Minnewaska View Post
That’s interesting. Can’t you explain this more thoroughly? I know G4 is heat treated, which is different, but I wasn’t aware of it’s lack of applicability. Seems odd, as windlass are designed for it,
and everyone markets it as anchor chain.
The important difference, at least as far as a windlass gypsy is concerned, is the size of the link.

Chain has two critical dimensions, the diameter of the metal that makes the link, in this case 3/8" and more critical for fit in a gypsy, the length of the link. G4 links are longer than BBB links and will not fit in the same gypsy, at least for the same metal diameter.

I have a SL windlass and I can fit 3/8" BBB or 5/16" G4 which have almost identical link lengths. I cannot use 3/8" G4 in that gypsy.

Last edited by skipmac; 09-27-2018 at 10:39 AM.
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Re: Simpson Lawrence gypsy not matching chain

Quote:
Originally Posted by Minnewaska View Post
Thatís interesting. Canít you explain this more thoroughly? I know G4 is heat treated, which is different, but I wasnít aware of itís lack of applicability. Seems odd, as windlass are designed for it,
and everyone markets it as anchor chain.

Oh, and regarding suitability for anchor chain, G4 is just fine. I think what Capta is referring to is BBB link dimensions and standard windlass gypsies are designed to be compatible whereas G4 will work but isn't specifically designed for fit in a standard gypsy.
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Re: Simpson Lawrence gypsy not matching chain

That is an old windlass and the gypsy is probably pretty worn, so it is possible that the new chain sits a bit higher in it than the old and is skipping on the top of the worn teeth.

The RC162 SL Horizon gypsy could use 3/8" BBB but not 3/8" HT (G4) chain. The RC172 could take either 5/16" BBB or 5/16" HT. We had both and found the RC172 could also handle 10mm BBB in a new gypsy, and the RC162 could also take 5/16" proof coil.

If you really were previously using 3/8" G4, my bet is that your gypsy is worn, or that your previous chain was 10mm and not 3/8".

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Re: Simpson Lawrence gypsy not matching chain

For those who don't have experience with Simpson-Lawrence gypsies, they have a unique design that makes them the most tolerant and broadly accepting gypsies I've come across. So it isn't unusual for them to take a wide variety of chain standards, sizes, and dimensions - where many other gypsy brands are far more restrictive and severe in requirements.

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Re: Simpson Lawrence gypsy not matching chain

Quote:
Originally Posted by colemj View Post
For those who don't have experience with Simpson-Lawrence gypsies, they have a unique design that makes them the most tolerant and broadly accepting gypsies I've come across. So it isn't unusual for them to take a wide variety of chain standards, sizes, and dimensions - where many other gypsy brands are far more restrictive and severe in requirements.

Mark
I have an older SL windlass and that is definitely my experience. The links per foot and link diameter between 3/8" BBB and 5/16" G4 are close but certainly not identical but both work perfectly in my gypsy.
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Re: Simpson Lawrence gypsy not matching chain

Quote:
Originally Posted by Minnewaska View Post
Thatís interesting. Canít you explain this more thoroughly? I know G4 is heat treated, which is different, but I wasnít aware of itís lack of applicability. Seems odd, as windlass are designed for it,
and everyone markets it as anchor chain.
G-4 is manufactured as a lifting chain, for cargo and heavy lifting, where weight per foot is of no consequence, but strength is. BBB anchor chain with it's shorter links and heavier weight per foot is the standard for anchor chain.
For some reason the yachting fraternity decided a stronger chain, though not actually strong enough to make any significant difference for most of our vessels should the chain come tight between the boat and anchor without a snub line, was better, though lighter per foot.

"Any idiot can make a boat go; it takes a sailor to stop one." Spike Africa aboard the schooner Wanderer in Sausalito, Ca. 1964.
ďBelieve me, my young friend, there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats.Ē ― Kenneth Grahame, The Wind in the Willows

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