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post #11 of 36 Old 09-27-2018 Thread Starter
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Re: Simpson Lawrence gypsy not matching chain

Thank you very much for your reply. Actually My operation manual says it handles BBB and G4 (HT), as well as American Proof Coil and a few other European types, on the same wildcat. I have the RC162 wildcat.

Is there a difference between G4 and calibrated G4? Are there two such chains?
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Re: Simpson Lawrence gypsy not matching chain

Here is a picture of my specs from the manual.
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Re: Simpson Lawrence gypsy not matching chain

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Originally Posted by MarinaOnMaui View Post
Thank you very much for your reply. Actually My operation manual says it handles BBB and G4 (HT), as well as American Proof Coil and a few other European types, on the same wildcat. I have the RC162 wildcat.

Is there a difference between G4 and calibrated G4? Are there two such chains?
I have a very similar manual with my windlass. It says it will work with about 15 different sizes and types of chain but that is complete nonsense. I even discussed it with the guy that bought out all the old SL parts and designs who was an engineer at SL and he confirmed it.

If your gypsy works with 3/8" BBB like mine it will work will 5/16" G4 HT. It will definitely not work with 3/8" G4 as the links are longer and will jump out of the pockets.
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Re: Simpson Lawrence gypsy not matching chain

Wow, this is great information!! I'm really thankful for your reply. We will check this out. We took the wild cat in last time but will do again and try 5/16 this time. Anyone want to buy 250' of brand new 3/8 G4 chain :-)
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Re: Simpson Lawrence gypsy not matching chain

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Wow, this is great information!! I'm really thankful for your reply. We will check this out. We took the wild cat in last time but will do again and try 5/16 this time. Anyone want to buy 250' of brand new 3/8 G4 chain :-)
Oh gee. Maybe you want to investigate getting a new gypsy for the windlass.
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Re: Simpson Lawrence gypsy not matching chain

Like I mentioned, check the condition of the "teeth" on the gypsy. If they are rounded down on one side, that is probably the problem. 3/8" imperial G4 chain will be sitting right on the top of the RC162 gypsy, and if the teeth are worn, it probably won't work well with that chain.

Our SL manual does not mention RC162 compatibility with 3/8" proof coil chain. Interesting that yours does. However, yours also shows compatibility with 5/16" proof coil, which our manual does not mention, but as I noted above, we discovered as true.

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Re: Simpson Lawrence gypsy not matching chain

For the hassle of replacement plus the $1000 for the new gypsy, it's easier to replace the chain, cut my losses and sell it on craigslist. The gypsy is in excellent condition as this boat's spent most of her life in a marina and day sailed. The old chain needed replacing because it sat in the bottom of the chain locker for 20 years and rusted to (literally) pieces! We recently did the first haul out of the boat since we bought her, and we decided to re-mark the chain and found when we pulled it out on the dock, it wasn't all connected! The links were rusted to within a hair's width. This was the chain on the very bottom of the pile. The first 100' were ok, but we would have got a hell of a fright if we needed all of it. Warning to everyone who hasn't inspected the entire length of their chain in a while, or since they bought the boat from someone else. Upon inspection, the entire chain should have been pulled out, not just visually inspected from the top of the pile. My bad. Thanks for your help!
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Re: Simpson Lawrence gypsy not matching chain

Yes we took the wildcat off and inspected it's teeth. I will take to our local chain supplier and have him look at it too. Maybe I don't have a dentist's eye :-) and missed something important. Thanks. On Maui, services for boats are very slim and some things I'm on my own for.
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Re: Simpson Lawrence gypsy not matching chain

Worn gypsy teeth are very obvious. If yours looks good, even if you don't think you are an expert on it, then it most likely is good.

Given the state of your old chain, are you sure it worked well with that gypsy? Maybe it also jumped?

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Re: Simpson Lawrence gypsy not matching chain

Good point. Upon closer inspection of the chain there were also links in it that connected different chain, so it's possible the original piece was BBB and then they added G4. Who knows. It's a mess. The only problem with changing to 5/16 is I'm not sure if it's strong enough fo the boat which is 21,000 lbs and a 45lb Bruce.
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