Lewmar Size 54 Medium Profile Hatch
Lewmar Size 54 Medium Profile Hatch — Product description
Upgrade your offshore yacht's foredeck with the Lewmar Size 54 Medium Profile Hatch, a robust solution designed for demanding marine environments. Crafted for larger vessels where strength and reliability are non-negotiable, this hatch combines thicker acrylic panes with reinforced frame sections to withstand harsh conditions while delivering a sleek, contemporary look that enhances your boat's aesthetic.
Engineered for Superior Strength and Sealing
What sets this hatch apart is Lewmar's innovative sealing technology, which ensures a watertight barrier against spray, rain, and waves. The unique design simplifies acrylic replacement over time, extending the hatch's lifespan without compromising performance. Imagine effortless ventilation on long passages, with friction levers that secure the lid at any angle up to 95 degrees—perfect for adjusting airflow precisely to your crew's comfort.
Boat owners rave about the anodized aluminum frame's corrosion resistance, standing up to saltwater exposure year after year. The curved upper profile not only boosts structural integrity but also sheds water efficiently, reducing pooling and potential leaks. Whether you're crossing oceans or cruising coastal waters, this hatch provides peace of mind with its battle-tested durability.
Key Advantages for Serious Sailors
- Deck-Accessible Operation: External handles let you unlock and open the hatch from outside, a lifesaver in rough seas or when hands are full.
- Customizable Ventilation: Hold the lid securely in endless positions, channeling fresh air below deck without slamming shut from wind gusts.
- Low-Maintenance Design: Smoke grey acrylic offers UV protection and a subtle tint for glare reduction, paired with ample spare parts availability for quick fixes.
- Streamlined Installation: Precise cut-out dimensions make retrofitting straightforward, minimizing downtime during upgrades.
Technical Specifications at a Glance
Built to exacting standards, here's what you get with the Size 54:
- Cut-Out Dimensions: Length: 15-7/16 in., Width: 19-15/16 in., Radii: 1-11/16 in.
- Overall Size: Length: 18-1/4 in., Width: 22-3/4 in., Height: 1-1/4 in., Lower Frame: 9/16 in.
- Acrylic: 1/2 in. thick, Smoke Grey tint for optimal light diffusion.
- Weight: 14.3 lb.—light enough for easy handling, heavy-duty where it counts.
- Radii (R): 2-7/8 in. for seamless deck integration.
Installation Insights for Seamless Fit
Fitting this hatch starts with verifying your deck's cut-out matches the specs—most users find it drops in with minimal templating. Seal the perimeter with marine-grade bedding compound for a bombproof bond. Torque fasteners evenly to avoid warping the frame. Pro tip: Align the hinges aft for gravity-assisted closure in following seas, enhancing safety and ease. Once installed, test the friction levers across the full range to confirm smooth operation.
Long-Term Care for Peak Performance
Keep it performing like new with simple routines: Rinse with fresh water after every sail to flush salt. Inspect seals annually, lubricating pivots with silicone-based grease. The smoke grey acrylic resists yellowing, but polish gently if scratches appear. Lewmar's spare parts ecosystem means you're never sidelined—replacements like gaskets or handles ship fast, restoring factory-fresh function.
Perfect for Foredeck and Beyond
On larger offshore yachts, this medium-profile hatch shines as a foredeck vent, flooding the saloon with light and breeze. Its deeper frame handles flexing decks better than low-profile alternatives, making it ideal for bluewater adventures. Pair it with companionways or vents for zoned climate control, turning your yacht into a floating sanctuary.
What makes the Lewmar Size 54 Medium Profile Hatch suitable for offshore yachts?
Its thicker acrylic and deeper aluminum frame provide exceptional strength against heavy seas and UV exposure, while the advanced sealing system prevents leaks for reliable performance far from shore.
Can I open this hatch from the deck?
Yes, convenient outside handles allow deck-side opening when unlocked, offering quick access without needing to enter the cabin first.
How does the friction lever work on this hatch?
The levers grip the lid firmly in any position up to 95 degrees, letting you fine-tune ventilation regardless of wind or heel angle.
Is the frame corrosion-resistant?
Absolutely—anodized aluminum construction fights off saltwater corrosion, ensuring longevity in marine conditions.
What's the acrylic thickness and color?
It features 1/2-inch thick smoke grey acrylic, balancing durability, UV protection, and natural light transmission inside.
Are spare parts available for maintenance?
Yes, Lewmar offers a comprehensive range of spares, from seals to handles, making repairs straightforward and cost-effective.
What are the exact cut-out dimensions?
Cut-out length is 15-7/16 inches, width 19-15/16 inches, with 1-11/16-inch radii for a precise, flush fit.
Size 54 Medium Profile Hatch
Ideal as a foredeck hatch on larger offshore yachts, the Medium Profile has thicker acrylic and deeper frame sections for greater strength and durability. It features Lewmar’s unique sealing system, allowing for easy acrylic replacement. All while retaining the smooth, modern lines of the low-profile hatch.
Features:
- Outside handles allow the hatch to be opened from the deck if it is not locked
- Friction levers hold the lid open in any position up to 95°
- Anodized aluminum frame for corrosion resistance
- Curved upper frame profile for strength as well as modern styling
- A full range of spare parts is available
Specifications:
- Lower Frame: 9/16 in.
- Acrylic Color: Smoke Grey
- Hatch Weight: 14.3 lb.
- Acrylic Window Thickness: 1/2 in.
- Length: 18-1/4 in.
- Width: 22-3/4 in.
- Height: 1-1/4"
- Radii R: 2-7/8 in.
- Cut-Out Length: 15-7/16 in.
- Cut-Out Width: 19-15/16 in.
- Cut-Out Radii R1: 1-11/16 in.
SKU: NVN-100688
MPN: 39954020
UPC: 743683116162
Technical specifications
| Brand | Lewmar |
| Model | Lewmar Size 54 Medium Profile Hatch |
| SKU / MFR# | 100688 |
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