Thank you all for the input. We bought this boat, a Meridian 490 Pilothouse, last year so just starting to learn all what I have on the boat. One thing that is puzzling is that from the only piece of paperwork I have for the windlass, it shows I have a H 1200, (Muir Cougar) which would match up to a 40' boat. For a 50' boat, some of the size charts recommend a 3/8'' chain so that is one reason I was looking into the larger size. I also have a 55lb Delta as the anchor, which I'm hoping is not too heavy for the windlass if it is a H1200. I won't be back to the boat until next month so at that time I need to see what is marked on the windlass, if anything. I know is has 'Muir' on the side but can't remember if it also shows 'Cougar' below it. I spoke with Imtra Corp out of New Bedford, MA which I guess is the home office for Muir in North America and he wasn't too much help. He did say to check for a number in the pocket of the gypsy and said I should see a number 133 which should equate to the 5/16th chain. It is possible the previous owner replaced the windlass with a different model and didn't leave the paperwork, so maybe the H1200 paperwork was for the old one. He also said I might not be able to find a serial number on the windlass and to check the paperwork, which in my case won't be of much help. To compound the situation the boatyards around where the boat is docked don't deal a lot with the larger boats, so as suggested above, I'm planning on taking the gypsy wheel to a larger boatyard and they can tell me what I have and how worn it is. Thanks again!!