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Lewmar Ocean Size 10 Flat Base Hatch 10" x 10" Cutout 39610050 Lewmar Ocean Size 10 Flat Base Hatch 10" x 10" Cutout 39610050
List Price: US$803.31
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Lewmar Ocean Size 10 Flange Base Hatch 10-3/16" x 10-3/16" Cutout Lewmar Ocean Size 10 Flange Base Hatch 10-3/16" x 10-3/16" Cutout
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LEWMAR OCEAN SIZE 20 FLAT BASE LEWMAR OCEAN SIZE 20 FLAT BASE
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LEWMAR OCEAN SIZE 20 FLANGE BASE LEWMAR OCEAN SIZE 20 FLANGE BASE
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Lewmar Ocean Size 30 Flat Base Hatch 12-5/8" x 17-3/4" Cutout Lewmar Ocean Size 30 Flat Base Hatch 12-5/8" x 17-3/4" Cutout
List Price: US$1,021.33
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Lewmar Ocean Size 30 Flange Base Hatch 12 7/8 x 18 " Cutout Lewmar Ocean Size 30 Flange Base Hatch 12 7/8 x 18 " Cutout
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Lewmar Ocean Size 40 Flat Base Hatch 16-3/8" x 16-3/8" Cutout Lewmar Ocean Size 40 Flat Base Hatch 16-3/8" x 16-3/8" Cutout
List Price: US$1,105.18
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Lewmar Ocean Size 40 Flange Base Hatch 16-9/16" x 16-9/16" Cutout Lewmar Ocean Size 40 Flange Base Hatch 16-9/16" x 16-9/16" Cutout
List Price: US$1,306.43
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Lewmar Ocean Size 44 Flat Base Hatch 17-3/16" x 17-3/16" Cutout Lewmar Ocean Size 44 Flat Base Hatch 17-3/16" x 17-3/16" Cutout
List Price: US$1,172.27
Our Price: US$1,199.00
Lewmar Ocean Size 44 Flange Base Hatch 17 3/8 x 17 3/8 " Cutout Lewmar Ocean Size 44 Flange Base Hatch 17 3/8 x 17 3/8 " Cutout
List Price: US$1,417.12
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Lewmar Ocean Size 50 Flat Base Hatch 14 5/8 x 19 3/4 " Cutout Lewmar Ocean Size 50 Flat Base Hatch 14 5/8 x 19 3/4 " Cutout
List Price: US$1,306.43
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Lewmar Ocean Size 50 Flange Base Hatch 14 13/16 x 19 15/16" Cutout Lewmar Ocean Size 50 Flange Base Hatch 14 13/16 x 19 15/16" Cutout
List Price: US$1,490.91
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Lewmar Ocean Size 54 Flat Base Hatch 15 1/4 x 19 3/4 " Cutout Lewmar Ocean Size 54 Flat Base Hatch 15 1/4 x 19 3/4 " Cutout
List Price: US$1,339.98
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Lewmar Ocean Size 54 Flange Base Hatch 15 7/16 x 19 15/16 " Cutout Lewmar Ocean Size 54 Flange Base Hatch 15 7/16 x 19 15/16 " Cutout
List Price: US$1,339.98
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Lewmar Ocean Size 60 Flat Base Hatch 19-3/4" x 19-3/4" Cutout Lewmar Ocean Size 60 Flat Base Hatch 19-3/4" x 19-3/4" Cutout
List Price: US$1,165.56
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Lewmar Ocean Size 60 Flange Base Hatch 19-15/16" x 19-15/16" Cutout Lewmar Ocean Size 60 Flange Base Hatch 19-15/16" x 19-15/16" Cutout
List Price: US$1,628.43
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Lewmar Ocean Size 70 Flat Base Hatch 24-1/2" x 24-1/2" Cutout Lewmar Ocean Size 70 Flat Base Hatch 24-1/2" x 24-1/2" Cutout
List Price: US$1,576.43
Our Price: US$1,599.00
Lewmar Ocean Size 70 Flange Base Hatch 24-11/16" x 24-11/16" Cutout Lewmar Ocean Size 70 Flange Base Hatch 24-11/16" x 24-11/16" Cutout
List Price: US$2,175.15
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Lewmar Ocean Size 77 Flat Base Hatch 27-5/16" x 27-5/16" Cutout Lewmar Ocean Size 77 Flat Base Hatch 27-5/16" x 27-5/16" Cutout
List Price: US$3,499.00
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Lewmar Ocean Size 77 Flange Base Hatch 27 5/16 x 27 1/2 " Cutout Lewmar Ocean Size 77 Flange Base Hatch 27 5/16 x 27 1/2 " Cutout
List Price: US$3,699.00
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Lewmar Size 00 Low Profile Hatch Flange Base 8 5/16 x 8 5/16" Cutout Lewmar Size 00 Low Profile Hatch Flange Base 8 5/16 x 8 5/16" Cutout
List Price: US$467.90
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Lewmar Size 03 Low Profile Hatch Flange Base 6 15/16 x 9 1/8 " Cutout Lewmar Size 03 Low Profile Hatch Flange Base 6 15/16 x 9 1/8 " Cutout
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Lewmar Size 10 Low Profile Hatch Flange Base 10 1/4 x 10 1/4 " Cutout Lewmar Size 10 Low Profile Hatch Flange Base 10 1/4 x 10 1/4 " Cutout
List Price: US$501.45
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Lewmar Size 18 Low Profile Hatch Flange Base 19.3 Dia, 16 9/16" Dia Cutout 39918030 Lewmar Size 18 Low Profile Hatch Flange Base 19.3 Dia, 16 9/16" Dia Cutout 39918030
List Price: US$1,177.30
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Lewmar Size 20 Low Profile Hatch Flange Base 7 15/16 x 13 11/16 " Cutout 39920030 Lewmar Size 20 Low Profile Hatch Flange Base 7 15/16 x 13 11/16 " Cutout 39920030
List Price: US$585.30
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Lewmar Size 22 Low Profile Hatch Self Supporting 23" Dia, 20 3/8" Cutout 39922030 Lewmar Size 22 Low Profile Hatch Self Supporting 23" Dia, 20 3/8" Cutout 39922030
List Price: US$1,004.56
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Lewmar Size 30 Low Profile Hatch Flange Base 12 7/8 x 18 " Cutout Lewmar Size 30 Low Profile Hatch Flange Base 12 7/8 x 18 " Cutout
List Price: US$669.15
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Lewmar Size 40 Low Profile Hatch Flange Base 16 9/16 x 16 9/16 " Cutout 39940030 Lewmar Size 40 Low Profile Hatch Flange Base 16 9/16 x 16 9/16 " Cutout 39940030
List Price: US$753.01
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Lewmar Size 41 Low Profile Hatch Self Supporting 6 15/16 x 16 9/16" Cutout 39941030 Lewmar Size 41 Low Profile Hatch Self Supporting 6 15/16 x 16 9/16" Cutout 39941030
List Price: US$635.60
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Lewmar Size 44 Low Profile Hatch Self Supporting 17 3/8 x 17 3/8" Cutout 39944030 Lewmar Size 44 Low Profile Hatch Self Supporting 17 3/8 x 17 3/8" Cutout 39944030
List Price: US$769.77
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Lewmar Size 50 Low Profile Hatch Self Supporting 14 13/16 x 19 15/16 " Cutout 39950030 Lewmar Size 50 Low Profile Hatch Self Supporting 14 13/16 x 19 15/16 " Cutout 39950030
List Price: US$786.54
Our Price: US$539.00
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Frequently Asked Questions

Low/Medium Hatch - Lid Replacement

Replacing the low and medium profile hatch lids are very easy. please watch the the video attached to see how it is done.

Video : Lewmar Low/Medium Hatch Lid Replacement

Are spares available for my hatch or portlight?

Spare parts can be supplied for all our current hatch and portlight ranges. For older hatches which are no longer manufactured a selection of the most frequently requested spares is available. It is necessary to identify your hatch/portlight to determine which spares you will need. Your local Lewmar retailer should be able to order the spares for you. If they have any problems ordering the spares please contact your nearest Lewmar retailer as listed in the Dealers section of this website.

How to identify my portlight?

There are a couple of styles of portlights and the attached PDF will help you work out which ones you have.

Related files

Identifying my portlights.pdf
Is my hatch an Mk1 or Mk2 ?

There are some small differences between the Mk1 and the Mk2 hatches. Please have a look to see which one you have on your boat. This is very important for when it comes to ordering spare parts for you hatches.

Related files

Low & Med Pro - Mk1-Mk2 identiification.pdf
How to identify your hatches

This PDF will show you the identifying features to work out what type hatch you have.

Related files

Hatch Identification.pdf
My hatch/portlight is leaking. What should I do?

If a Lewmar hatch or portlight does start to leak it is important to establish the leak path. Where the water finally appears in side the boat is not always a good indication of the leak path. The easiest way to trace a leak is to wait for a dry day and use a marina hose. Establishing the leak path may be difficult if there is a significant level of condensation on the hatch/portlight.
Possible leak paths are:
Under the lower frame. This is caused by insufficient bedding compound between the low frame and the deck, or the compound breaking down over time. It may also occur if the cut out in the deck is too big or the hatch/portlight is not mounted on a flat surface. This is a build or installation problem.
Between the lower frame and the rubber seal (gasket). This may be caused by the upper frame being distorted or a loss of seal pressure. Lay a straight edge along the sides of the hatch and also diagonally across the lid to check for twist. Also check the seal for dirt or damage. Try closing the lid down on a sheet of paper. If the paper can be slid out when the hatch is closed the seal is not compressing.
Through the holes in the acrylic used on some products to fasten the handles, hinges or friction levers. The handles have a standard O-ring under the plastic moulding on the outside of the acrylic. This should be cleaned and lightly lubricated with silicone grease.
Between the acrylic and the upper frame. (Not Standard portlights and Concept hatches.) This is caused by a breakdown in the adhesion between the sealant and the upper frame or acrylic. Try gently pushing the acrylic up out of the frame and look for movement. This type of leak is the least common.

Can I replace another manufacturer's hatch or portlight with a Lewmar hatch or portlight?

Yes. However if you cannot match up the old hatch or portlight with the existing range of cut outs, the only solution may be to build an intermediate frame from timber.

If I am replacing older Lewmar hatches or portlights and I would like to find a direct replacement, have the sizes remained constant?

The Lewmar standard cut out sizes have remained constant, however the corner radius may have changed on certain models.

What can I use to clean my hatch & portlight windows?

Wash the windows with warm soapy water. All solvents should be avoided as they will cause the acrylic to craze.