{"product_id":"attwood-sl37-120-1-gas-spring-lift-support-120-lb","title":"Attwood SL37-120-1 Gas Spring Lift Support, 120 lb","description":"\u003cp class=\"nvn-hero\"\u003eNeed to bring a heavy hatch or lid back to life? The Attwood SL37-120-1 gas spring gives you 120 pounds of lift force, extends to 26.3 inches, and compresses to 16.1 inches. Eyelet ends on both mounts make it a straightforward swap on boat hatches, engine covers, and deck lids that have lost their hold.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eA gas spring is one of those parts you never think about until it quits. Then every time a hatch drops on your fingers, you remember it exists. The Attwood SL37-120-1 is a marine gas spring, also called a lift support or gas strut, and its whole job is to hold a hinged lid open and lower it down under control. It's rated at 120 pounds of output force, extends to 26.3 inches, and compresses to 16.1 inches when the lid is shut. That works out to 10.2 inches of travel between fully closed and fully open.\u003c\/p\u003e\n\u003cp\u003eGas springs like this one show up all over a boat. Engine compartment hatches, in-deck fish boxes, livewell lids, rod locker doors, seat bases, and console access panels all lean on a strut to stay up while your hands are busy with something else. Over time the pressurized gas inside starts to weep past the seal. The lid gets heavy, opens slowly, or won't stay up on its own anymore. That's the signal to swap it out, and honestly it's usually a five-minute job with a couple of clips or bolts.\u003c\/p\u003e\n\u003cp\u003eBoth ends of this strut use eyelet mounts. That means it pins onto eyelet-style studs or clevis brackets rather than the snap-on ball sockets you'll find on some other configurations, so check which style your boat uses before ordering. The rod measures 8 millimeters and the cylinder body is 18 millimeters, with a 10 millimeter socket sizing. When you're ready to replace an old one, measure it end to end while it's fully extended, note the mounting style, and match those to this unit.\u003c\/p\u003e\n\u003cp\u003eHere's the thing about gas springs. They're sized by three numbers: extended length, compressed length, and force. Get all three right and the new one behaves exactly like the one that came off. Force matters as much as length. Too little and the lid sags shut. Too much and it fights you on every close, or it can even push the lid up on its own. The 120 pound rating here suits a medium to heavy hatch. If your original carried a different number, match what the boat builder spec'd, because that rating was picked for the weight and hinge geometry of that exact lid.\u003c\/p\u003e\n\u003cp\u003eFor the longest life, mount it with the rod pointing down when the lid is closed. Rod-down keeps the internal oil sitting against the seal, which is what keeps the strut from drying out and losing pressure early. On wider hatches these run as a matched pair, one on each side. If one side has gone soft, do both at the same time. The other strut is usually not far behind, and matched springs keep the lift even so the lid opens straight instead of racking to one corner.\u003c\/p\u003e\n\u003cp\u003eThe SL37-120-1 comes with a black finish that blends into most hatch openings and stands up to the damp, salty air these parts live in day after day. Keep in mind it's a replacement strut, not a full hinge kit, so you'll reuse your existing brackets, studs, and hardware. And if you're hunting for a specific factory part number that's no longer listed, don't get hung up on the label. Match the extended length, the compressed length, and the force rating instead. Those three numbers are what actually decide whether a gas spring holds your hatch the way it should.\u003c\/p\u003e\n\u003cp\u003eNot sure yours is done? Open the lid halfway and let go. A healthy gas spring holds it right there without creeping. If it drifts closed, feels spongy, or slams down, the seal is giving up and it's time for a fresh one. Replacing a worn strut before it fails completely saves you a pinched hand and a lid that won't stay put while you're reaching for gear.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e120 pound output force holds medium to heavy hatches, lids, and access panels open without creeping shut.\u003c\/li\u003e\n  \u003cli\u003e26.3 inch extended length and 16.1 inch compressed length give 10.2 inches of travel for a full, controlled swing.\u003c\/li\u003e\n  \u003cli\u003eEyelet upper and lower mounts pin to eyelet studs or clevis brackets for a secure, rattle-free connection.\u003c\/li\u003e\n  \u003cli\u003e8 millimeter rod and 18 millimeter cylinder in a compact body that fits tight hatch and locker openings.\u003c\/li\u003e\n  \u003cli\u003e10 millimeter socket sizing matches common marine gas-spring end fittings.\u003c\/li\u003e\n  \u003cli\u003eBlack finish resists the damp, salty air around engine hatches, fish boxes, and deck lids.\u003c\/li\u003e\n  \u003cli\u003eDirect replacement strut, so you reuse your existing brackets and hardware for a quick swap.\u003c\/li\u003e\n  \u003cli\u003eSized by extended length, compressed length, and force so it's easy to match to the strut on your boat.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Attwood Marine reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow much force does the Attwood SL37-120-1 put out?\u003c\/summary\u003e\n    \u003cp\u003eIt's rated at 120 pounds of output force, which suits a medium to heavy hinged lid or hatch. If your old strut carried a different rating, match that number so the lid stays up without fighting you on the close.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the extended and compressed lengths?\u003c\/summary\u003e\n    \u003cp\u003eIt extends to 26.3 inches and compresses to 16.1 inches, giving 10.2 inches of travel between closed and fully open.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat kind of end mounts does it use?\u003c\/summary\u003e\n    \u003cp\u003eBoth ends use eyelet mounts. They pin onto eyelet-style studs or clevis brackets rather than snapping onto ball studs, so check that your boat uses eyelet fittings before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know if it'll fit my hatch?\u003c\/summary\u003e\n    \u003cp\u003eGas springs are matched by three numbers: extended length, compressed length, and output force. Measure your old strut end to end while it's fully extended, note the mount style, and compare it to this unit's 26.3 inch extended, 16.1 inch compressed, 120 pound rating.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhich way should I install it?\u003c\/summary\u003e\n    \u003cp\u003eMount it with the rod pointing down when the lid is closed if your setup allows. Rod-down keeps the internal oil against the seal, which helps the strut hold pressure and last longer.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShould I replace both struts at once?\u003c\/summary\u003e\n    \u003cp\u003eOn a hatch that uses a pair, yes. If one side has gone soft, the other is usually close behind. Replacing both keeps the lift even so the lid opens straight.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I tell if my current gas spring is worn out?\u003c\/summary\u003e\n    \u003cp\u003eOpen the lid halfway and let go. A good strut holds it in place. If it creeps closed, feels spongy, or drops on its own, the internal seal is leaking and it's time to replace it.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a complete hinge kit?\u003c\/summary\u003e\n    \u003cp\u003eNo. It's the gas spring itself, a direct replacement for a worn strut. You'll reuse your existing brackets, studs, and mounting hardware.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the rod and cylinder sizes?\u003c\/summary\u003e\n    \u003cp\u003eThe rod is 8 millimeters and the cylinder body is 18 millimeters, with 10 millimeter socket sizing on the fittings.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhere are these gas springs typically used on a boat?\u003c\/summary\u003e\n    \u003cp\u003eAll over. Engine compartment hatches, in-deck fish boxes, livewell lids, rod locker doors, seat bases, and console access panels commonly use a strut like this to stay open.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eAttwood SL37-120-1 Marine Gas Spring Lift Support\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAttwood Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003eSL37-120-1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e715584371209\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eGas\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUpper Mount\u003c\/th\u003e\n\u003ctd\u003eEyelet\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eLower Mount\u003c\/th\u003e\n\u003ctd\u003eEyelet\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCompressed Length\u003c\/th\u003e\n\u003ctd\u003e16.1 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eExtended Length\u003c\/th\u003e\n\u003ctd\u003e26.3 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eTravel Length\u003c\/th\u003e\n\u003ctd\u003e10.2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOutput Force\u003c\/th\u003e\n\u003ctd\u003e120 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSocket Size\u003c\/th\u003e\n\u003ctd\u003e10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eRod Diameter\u003c\/th\u003e\n\u003ctd\u003e8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCylinder Diameter\u003c\/th\u003e\n\u003ctd\u003e18 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How much force does the Attwood SL37-120-1 put out?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's rated at 120 pounds of output force, which suits a medium to heavy hinged lid or hatch. If your old strut carried a different rating, match that number so the lid stays up without fighting you on the close.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What are the extended and compressed lengths?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It extends to 26.3 inches and compresses to 16.1 inches, giving 10.2 inches of travel between closed and fully open.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What kind of end mounts does it use?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Both ends use eyelet mounts. They pin onto eyelet-style studs or clevis brackets rather than snapping onto ball studs, so check that your boat uses eyelet fittings before ordering.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I know if it'll fit my hatch?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Gas springs are matched by three numbers: extended length, compressed length, and output force. Measure your old strut end to end while it's fully extended, note the mount style, and compare it to this unit's 26.3 inch extended, 16.1 inch compressed, 120 pound rating.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Which way should I install it?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Mount it with the rod pointing down when the lid is closed if your setup allows. Rod-down keeps the internal oil against the seal, which helps the strut hold pressure and last longer.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Should I replace both struts at once?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"On a hatch that uses a pair, yes. If one side has gone soft, the other is usually close behind. Replacing both keeps the lift even so the lid opens straight.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I tell if my current gas spring is worn out?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Open the lid halfway and let go. A good strut holds it in place. If it creeps closed, feels spongy, or drops on its own, the internal seal is leaking and it's time to replace it.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this a complete hinge kit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. It's the gas spring itself, a direct replacement for a worn strut. You'll reuse your existing brackets, studs, and mounting hardware.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What are the rod and cylinder sizes?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The rod is 8 millimeters and the cylinder body is 18 millimeters, with 10 millimeter socket sizing on the fittings.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Where are these gas springs typically used on a boat?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"All over. Engine compartment hatches, in-deck fish boxes, livewell lids, rod locker doors, seat bases, and console access panels commonly use a strut like this to stay open.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Attwood Marine","offers":[{"title":"Default Title","offer_id":45081471025245,"sku":"2010167","price":18.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_d7860f24-b33d-4d38-a08b-27c0ae03a5e8.jpg?v=1790012374","url":"https:\/\/nvnmarine.com\/products\/attwood-sl37-120-1-gas-spring-lift-support-120-lb","provider":"NVN Marine","version":"1.0","type":"link"}