Attwood SL36-60-1 Gas Spring Lift Support, 60 lb Force

The Attwood Ni-Slide SL36-60-1 is a gas spring lift support built to hold a boat hatch, seat back, or storage lid open without a prop rod getting in the way. It puts out 60 pounds of force, extends to 17.2 inches, and compresses down to 10.2 inches, so you get a clean 7 inches of travel from closed to fully open. Eyelet ends on both the rod and the cylinder make it a straightforward bolt-in on most bracket setups.

If you've ever had a livewell lid or a deck hatch slam shut on your hand, you already know why a good gas spring matters. This one is sized for medium-weight lids. That 60 pound rating is the sweet spot for a lot of fiberglass hatches and cushioned seat bases that a lighter 40 pound strut just can't hold up. Attwood has had a hand in marine hardware for more than a century, and the Ni-Slide line is their everyday replacement spring for exactly this kind of job.

Picking the right gas spring comes down to two things. Length and force. Measure your old strut end to end, eyelet center to eyelet center, and check that the extended length lands near 17.2 inches with about 7 inches of stroke. Then match the force. Too little and the lid drifts down on you. Too much and it fights you every time you try to close it. If your current spring is a 60 pound unit and it held fine before it wore out, this is a direct like-for-like swap.

Both ends use an eyelet fitting, so you'll need a matching eyelet bracket or eyelet-to-ball-stud hardware on your boat. The rod measures 8 millimeters, the cylinder body is 18 millimeters, and the fitting takes a 10 millimeter socket. For the longest life, mount it rod-end down whenever the geometry allows. That keeps the seal lubricated and helps the spring hold its charge through cold mornings and hot afternoons out on the water.

This is a workhorse part, not a showpiece. It ships in bulk packaging, which is exactly what you want when you're buying a replacement and don't care about a retail blister pack. Rig it up on a rod-locker lid, a console hatch, an engine box, a helm seat, or a stern storage compartment. Anywhere a lid needs to stay put and open smoothly, a correctly sized gas spring earns its keep. Boaters running center consoles, pontoons, and cuddy cabins all replace these eventually, because they're a wear item that sees salt, sun, and a few thousand open-close cycles a season.

Because it lives on a boat, corrosion resistance matters. The Ni-Slide series is Attwood's marine lift-support line, made to shrug off the salt spray and humidity that chew through generic automotive struts. Give the rod an occasional wipe and a quick rinse after a salty day, keep the eyelet pivots free of grit, and it'll ride out season after season without complaint.

Gas springs don't last forever. The charge bleeds off slowly over the years, and once a lid starts sagging or won't stay up on its own, it's time. Swapping one is usually a five-minute job with a socket and a little patience. Keep the old spring handy to confirm your bracket spacing before you toss it. And if you're not sure whether you need this 60 pound version or a lighter one, hold the lid open and feel how much support it wants. If a 40 pound spring let it creep down, step up to this one.

One last thing. Gas springs are sold by force and length, not by boat model, so don't get hung up trying to find a part that lists your exact hull. Match the numbers on your old spring to the numbers here and you're set.