{"product_id":"lewmar-66840079-chain-stopper-with-lever-10mm-3-8-inch-chain-316-stainless-steel","title":"Lewmar 66840079 Chain Stopper with Lever, 10mm \/ 3\/8 Inch Chain, 316 Stainless Steel","description":"\u003cp\u003eThe Lewmar 66840079 is a cast 316 stainless steel chain stopper with lever-operated claw, built to secure ground tackle chain when the boat is at anchor and the windlass is not in use. A windlass is not designed to hold high anchoring loads on its own; a chain stopper transfers that load off the windlass gypsy and onto a dedicated load-bearing fitting, protecting the windlass motor and gearbox from strain during overnight anchoring or extended stops. The lever mechanism allows the claw to be opened and closed by hand to capture a chain link and lock the rode in place, then released quickly when it is time to weigh anchor.\u003c\/p\u003e\u003cp\u003eThis chain stopper is sized for 10mm (3\/8 inch) chain and is finished in 316 stainless steel for corrosion resistance in a marine environment. It is part of Lewmar's cast stainless chain stopper range, designed to combine a compact deck footprint with a secure, positive lock on the chain.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Lewmar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 66840079\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Chain Stopper with Lever\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChain Size:\u003c\/strong\u003e 10 mm \/ 3\/8 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 316 Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 18 x 10 x 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.18 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 743683328404\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eFits 10mm (3\/8 inch) anchor chain\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat chain size does the Lewmar 66840079 chain stopper fit?\u003c\/strong\u003e It is sized for 10mm (3\/8 inch) chain, matching the chain size stamped into the part number designation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy do I need a chain stopper if I already have a windlass?\u003c\/strong\u003e Windlasses are not designed to hold high loads while a boat is at anchor, so the chain should be secured with a chain stopper such as the Lewmar 66840079 whenever the windlass is not actively being used, taking the anchoring load off the windlass gearbox.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Lewmar 66840079 made from?\u003c\/strong\u003e It is made from cast 316 stainless steel, chosen for its corrosion resistance in saltwater and marine deck environments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the lever on this chain stopper work?\u003c\/strong\u003e The Lewmar 66840079 uses a lever-operated claw that opens to capture a link of chain and closes to lock the rode in place, allowing quick release when it is time to raise anchor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Lewmar 66840079 chain stopper?\u003c\/strong\u003e The unit measures 18 x 10 x 6 inches and weighs 3.18 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Lewmar 66840079 chain stopper weigh?\u003c\/strong\u003e It weighs 3.18 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this chain stopper be used with rope rode instead of chain?\u003c\/strong\u003e The Lewmar 66840079 is designed to secure chain; for rope rode, the rope should instead be attached to a load-bearing point such as a cleat.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Lewmar 66840079 genuine Lewmar hardware?\u003c\/strong\u003e Yes, it is a genuine Lewmar part, number 66840079, from Lewmar's cast stainless chain stopper range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should the chain stopper be engaged?\u003c\/strong\u003e It should be engaged whenever the boat is at anchor and the windlass is not in use, so the anchoring load is held by the chain stopper rather than the windlass.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Lewmar 66840079 include mounting hardware?\u003c\/strong\u003e The listing covers the Lewmar 66840079 chain stopper with lever and claw assembly; check the specific dimensions and deck layout before ordering to confirm it suits your installation.\u003c\/p\u003e","brand":"Lewmar","offers":[{"title":"Default Title","offer_id":49025138065627,"sku":"LEW-66840079","price":250.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/img_bc423d9b-0bc2-4d98-a9fb-4aa3811e464b.jpg?v=1785332733","url":"https:\/\/www.goodvibesmarina.com\/products\/lewmar-66840079-chain-stopper-with-lever-10mm-3-8-inch-chain-316-stainless-steel","provider":"Good Vibes Marina","version":"1.0","type":"link"}