✅ Ultimate Marine Grade: Manufactured from premium 316 stainless steel to withstand harsh saltwater and prevent rust.
✅ Heavy-Duty Lift: High-pressure nitrogen handles heavy fiberglass and teak hatches effortlessly (50N - 1500N options).
✅ Smooth & Safe Closing: Hydraulic damping ensures your hatch lift spring closes gently, preventing dangerous slamming.
✅ All-Weather Seals: Upgraded fluororubber seals keep out moisture and salt spray, ensuring years of maintenance-free use.
Colewell's stainless steel gas struts for boat hatches are high-performance lift supports engineered exclusively for the marine environment. Standard steel struts quickly succumb to rust and seize up when exposed to sea air. Our struts are manufactured from premium marine-grade stainless steel, offering unparalleled corrosion resistance against saltwater, UV rays, and high humidity.
Whether you need a reliable boat hatch spring lift for heavy engine room covers, deck lockers, or cabin portholes, these struts provide stable, smooth lifting support. They take the physical strain out of opening heavy fiberglass hatches and ensure they remain safely open while you work or access storage, effectively preventing dangerous slamming on rough seas.
| Force Range | 50N - 1500N (Customizable) • 50N - 400N: For small livewells, glove boxes, and electronics covers. • 400N - 800N: Standard for deck lockers and floor hatches. • 800N - 1500N: Heavy-duty for sound-insulated engine room covers. |
| Material Grade | 316 Stainless Steel (Premium Marine Grade): Offers the highest corrosion resistance. Ideal for exterior deck hatches constantly exposed to saltwater spray. 304 Stainless Steel: Excellent rust resistance for freshwater boats or interior cabin applications. |
| Sealing Material | High-quality fluororubber (Viton) seals effectively prevent sea salt, dust, and moisture from entering the cylinder, ensuring long-term pressure retention. |
| Operating Conditions | • Temp Range: -30℃ to +80℃ (Can withstand direct summer sunlight on the deck). • Weather Resistance: IPX5 waterproof rating and 500+ hours Salt Spray Tested. |
Boats endure constant pounding from waves. Our hatch lift springs undergo 100,000-cycle vibration testing to ensure they won't leak or lose pressure during high-speed cruising or rough seas.
Equipped with stainless steel M8/M10 ball studs or heavy-duty eyelet brackets. The anti-loosening thread design prevents the strut from unscrewing under engine vibration.
A built-in hydraulic buffer slows the hatch just before it reaches full extension or closure, protecting your boat's fiberglass gel coat and your fingers from sudden impacts.
Heavy Duty Lift: Lifts heavy, sound-proofed engine covers safely, allowing mechanics hands-free access for maintenance without fear of the hatch dropping.
Corrosion Proof: 316 stainless steel struts endure constant soaking from waves and washdowns, perfect for fish boxes, anchor lockers, and under-seat storage.
Stable Hold: Provides gentle lifting support for cabin windows, preventing them from slamming shut when the boat rolls or hits a wake.
Smooth Access: Used for overhead electronics boxes or side-console doors, offering a premium, smooth-opening feel for luxury center consoles.
316 Stainless Steel construction guarantees no rust stains on your clean white deck.
Acts as a damper, absorbing the impact of hull vibrations to protect hatch hinges.
Firmly holds covers open during rolling swells, preventing accidental closures.
Hydraulic circuits ensure effortless lifting of heavy wet fiberglass or teak doors.
Sealed system requires zero lubrication, keeping your bilge and deck clean.
Available in custom lengths and force ratings to match exact boat builder specs.
Colewell understands that the ocean is unforgiving. That's why we don't just rebrand automotive struts for boats. Our boat hatch spring lifts are built from the ground up using verified 304 and 316 stainless steel.
Trusted by shipbuilders and yacht owners globally, we provide reliable, heavy-duty lift solutions that ensure safety and convenience on the water.
A: If the strut will be exposed to saltwater spray on the exterior deck, 316 stainless is highly recommended. For freshwater boats or interior cabin compartments, 304 is sufficient.
A: You need to know the weight of the hatch and the mounting angles. The easiest way for replacement is to read the Newton (N) or LBS rating printed on your old strut. If building new, contact our engineers for a free calculation.
A: Yes. A slamming hatch means the old struts have lost gas pressure. Replacing them with our new hatch lift springs will restore the smooth, hydraulic holding power.
A: Usually not. Marine struts typically have high force ratings (400N+). You must mount them on the boat hatch and use the leverage of the door to compress them.
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