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FITTING INSTRUCTIONS

Cut-out sizes for every Atlantic portlight size, deck thickness limits, bedding, fastening torque and the screw length to order for your skin thickness, plus care notes for Lewmar Atlantic portlights and fixedlights.

DocumentLewmar Atlantic Portlight & Fixedlight (Thin Valance) Fitting Instructions
FormatPDF · 2 pages · 0.1 MB
LanguageEnglish
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Lewmar Atlantic Portlight & Fixedlight (Thin Valance) — Fitting Instructions

Design Category

Product ISO/DIS 12216.2(E)
Portlights sizes 10, 30 & 32 and all fixedlights Design cat. "A", areas I, II, III and IV
All other portlight sizes Design cat. "A", areas II, III and IV
  • Lower edge of a product fitted in the hull area I: at least 600mm above the flotation plane, boat fully loaded and upright at rest.
  • For 'Ocean' or 'Offshore' voyages no part of the plate or its framing may stand proud of the hull or an integral built-in fairing.
  • Modifying the product invalidates compliance.

Cut-Out Sizes

Size Dim A Dim B Corner radius
10 154 mm / 6 1/16" 284 mm / 11 3/16" 61 mm / 2 3/4"
30 180 mm / 7 1/16" 380 mm / 14 15/16" 61 mm / 2 3/4"
32 180 mm / 7 1/16" 380 mm / 14 15/16" 90 mm / 3 1/2"
40 180 mm / 7 1/16" 460 mm / 18 1/8" 61 mm / 2 3/4"
52 221 mm / 8 11/16" 539 mm / 21 1/4" 61 mm / 2 3/4"
60 180 mm / 7 1/16" 580 mm / 22 13/16" 61 mm / 2 3/4"
64 180 mm / 7 1/16" 630 mm / 24 13/16" 61 mm / 2 3/4"

Radius inch values as printed on this sheet (61 mm is about 2 3/8"); work from the millimetre figures.

Fitting

  • Flat mounting surface within ±1mm, extending 12mm beyond the cut-out. Deck/hull thickness 8–24mm (portlight) or 8–35mm (fixedlight).
  • Hold the inner frame inside to check for a flat bearing area; mark the cut-out in pencil. Make a template when fitting several.
  • Cut along the line; seal exposed laminate on composite decks; deburr metal decks. Portlights are not stiffening members: stiffen the deck against heavy-weather distortion.
  • Measure the skin thickness T (and inner trim if fitted). Re-check the frame in the aperture, then bed the outer-frame channel with an adhesive marine sealant (e.g. silicone), at least 3mm thick and compressible.
  • Fit the outer frame squarely on the opening with the inner frame joint on the lower edge; bolt up from the centre out to the ends, maximum torque 2.8Nm (25 in.lb). Clean off surplus sealant.
  • Portlights: check opening, closing and locking and even seal pressure. Leave the flyscreen on board.
Skin thickness T Screw Order No.
8 – 10mm M5x16 360360999
11 – 15mm M5x20 360361999
16 – 19mm M5x25 360362999
20 – 24mm M5x30 360363999

The M5 screws supplied suit skin thickness 8–10mm. A wrong screw length damages the product. Our store lists these order numbers with different screw lengths, so ask us to confirm before ordering.

User Notes

  • Flyscreens fit between the outer frame and the seal, so the portlight closes with the screen in place.
  • Deadlight: make a plywood, aluminium or fibreglass plate notched to clear hinges and handles; remove the trim moulding and drill and tap the inner frame to bolt it on.
  • Wash with soap, water and a soft cloth. Never use abrasive or solvent cleaners on the acrylic.

Need a part that isn't listed? Ask us to source it and quote the part number from the PDF.

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