Gas Springs

Onboard, the correct operation of hatches, locker lids, and seating depends largely on the efficiency of gas springs. When a hatch struggles to stay raised or, conversely, offers too much resistance when closing, the system has reached the end of its service life. The marine environment, characterized by constant humidity and thermal swings between the engine compartment and outside air, takes a heavy toll on seals and the gas chamber's integrity.

Replacing a spring requires attention to technical data. The force, expressed in Newtons, must correctly offset the weight of the panel to be lifted. A spring that is too powerful risks deforming the hinges or the fiberglass mounting points, while one that is too weak makes the hatch dangerous. Always verify the overall length, the piston stroke, and the dimensions of the end fittings to ensure the chosen part fits perfectly in the existing space.

As technicians, our goal is to prevent you from doing the job twice. Often the problem is not just the load, but corrosion of the pins or loss of seal integrity at the end fittings. Checking the entire mounting system at the time of spring replacement is good practice to prevent unexpected seizure during a passage.

If you have doubts about compatibility or the force needed for your specific model, our pre-sales technical support is available to analyze the configuration and recommend the most appropriate technical solution. With Nautiba, you get clear delivery timelines and the correct component sizing for your boat.

How to choose the correct gas spring

• Always measure the center-to-center distance between the mounting holes with the spring fully extended.
• Check the Newton (N) value stamped on the body of the old spring; if it is illegible, estimate from the hatch weight.
• Verify the cylinder body diameter and rod diameter to ensure clearance in any recessed mounting seats.
• Inspect the end fittings: eye-end, ball-joint, and fork types exist, and they are not always interchangeable.
• If the hatch is heavy or exposed to strong wind, consider a modest increase over the rated load, but avoid going too far to prevent stressing the brackets.

What happens if I install a spring with more Newtons than needed?

Excessive force puts significant mechanical stress on the anchor points and hinges. Over time, this can cause cracks in the gelcoat or structural failure of the mounting screws, making the hatch difficult or dangerous to close.

Can a depleted gas spring be recharged?

In marine applications, recharging a gas spring is not recommended. The sealed integrity and internal pressure are calibrated during manufacturing; once the seal fails, replacement with a new component is the only safe way to prevent unexpected failure.

Are all gas springs corrosion-resistant?

Not all springs are suitable for marine use. It is essential to choose models with a surface treatment resistant to salt oxidation. Always check that the body and rod are treated to withstand the corrosive environment, and avoid components designed for standard industrial or automotive applications.

How do I know when a spring has reached the end of its service life?

Typical signs are a hatch that no longer stays open on its own, the need to force the closure, or oil residue on the rod, a clear sign that the seal has failed.