Lewmar Low Profile Hatch — Fitting & Adjustment Instructions

Fitting Instructions

• For deck and coachroof of yachts to ISO/DIS 12216.2(E), Design Category A, areas II, III and IV. Fitting vents or other modifications voids compliance.
• Flat surface within ±1 mm; deck/hull at least 15 mm (5/8") thick. Fastenings clear of moulding radii; allow clearance for the lid to open.
• Do not open and close the hatch more than necessary until the lower frame is securely mounted.
• Mark around the outside edge of the lower frame flange (allow for trims), keep the frame square to the opening (use a template for several hatches) and cut with a suitable saw.
• Seal exposed laminate on cored decks; deburr metal decks and insulate the aluminium frame where galvanic corrosion is possible.
• The hatch is not a stiffening member: the deck must be stiff enough not to distort in heavy weather.
• Bed in the lower frame channel with a marine adhesive sealant (e.g. silicone) at least 3 mm thick and compressible enough to pull the frame down onto the deck.
• Drill two holes in opposite corners first. Stainless fasteners: M6 at the hinge, M5 everywhere else. Then drill the rest and fasten from the centre outward; clean off surplus sealant.
• Check closing/locking and even seal pressure after installation.

User Notes

• Larger hatches are not self-supporting past vertical and will fall fully open if unrestrained.
• Locking ventilation position: close the handles into the catch block centre slot; do not stand on or load the lid in this position.
• Wash with soap, water and a soft cloth; never abrasive or solvent cleaners on the acrylic.
• Keep hands clear of lever and lid pinch zones.

Friction Hinge and Lever Adjustment