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06-02-2022, 12:50 PM
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#1
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Member
City: Denver
Vessel Name: Ottelia
Vessel Model: Grand Banks 42
Join Date: Dec 2021
Posts: 16
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Forward Hatch Replacement/Measurements on 42 Classic
I need to replace the original Lewmar hatch on my 1988 GB 42 classic (its leaking and plexiglass is crazed). Unfortunately I don't have accurate measurements for the exterior hatch frame and I live 1,400 miles from my boat so....
Has anyone replaced their hatch? If so what size Lewmar, Vetus or Bomar did you use and was it a perfect fit?
I believe GB used the Lewmar Trimline or Rollstop model hatch (produced from 1986-99) so ideally any GB 42 classic in that range would have the same hatch size.
Thanks in advance for your replies and I'll post a write-up of the work at the end of the month when I get to the boat.
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06-02-2022, 10:00 PM
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#2
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Guru
City: Groton, CT
Vessel Name: Datenight
Vessel Model: North Pacific 45
Join Date: Jan 2008
Posts: 1,106
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You might want to try Hatch Masters in Norwalk, CT. https://hatchmasters.com/ They can rebuild your present hatch.
If you are a diy person, remove the hatch (heat gun and wood wedges help) and "glass". Have the frame sand blasted and powder coated and new glass from a local glass shop. This worked for me.
Rob
__________________
North Pacific 45
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06-03-2022, 02:36 AM
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#3
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Guru
City: Sydney
Vessel Name: Sojourn
Vessel Model: Integrity 386
Join Date: Oct 2011
Posts: 13,329
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Sometimes they leak because the seal around the "glass" has shrunk and separated where the ends joined. Careful masking and use of a good matching sealant can work wonders. It has for me, twice, on glass surround seals.
__________________
BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
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06-03-2022, 02:51 PM
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#4
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Member
City: Denver
Vessel Name: Ottelia
Vessel Model: Grand Banks 42
Join Date: Dec 2021
Posts: 16
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Thanks for the suggestions on fixing the hatch. Unfortunately this hatch has issues with the plexiglass as well as frame. Its time to replace.
Anyone with access to their boat that could give me the outside frame dimensions (from topside)?
Later this month I'll fly out to my boat for 4 days or work. I'd love to get a hatch ordered prior to that.
Cheers, Rob
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06-03-2022, 07:21 PM
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#5
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Guru
City: Jupiter, Florida
Vessel Name: Black Eyed Susan
Vessel Model: Grand Banks 42' Classic
Join Date: Nov 2016
Posts: 1,644
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Hi Rob. We are at the beginning of a tropical storm which will go through Sunday. I will be going to the boat to check and make sure all is well. When I do I will get you the exterior measurements.
__________________
Hal
BLACK EYED SUSAN
Grand Banks 42 Classic
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06-04-2022, 11:35 AM
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#6
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Member
City: Denver
Vessel Name: Ottelia
Vessel Model: Grand Banks 42
Join Date: Dec 2021
Posts: 16
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Thanks and best of luck with the storm, sounds like big flooding so far.
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06-04-2022, 07:15 PM
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#7
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Guru
City: Jupiter, Florida
Vessel Name: Black Eyed Susan
Vessel Model: Grand Banks 42' Classic
Join Date: Nov 2016
Posts: 1,644
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The storm ended up being no big deal. Some good rain, a little wind... but nothing to write home about.
Here are the dimensions of my forward hatch. I took some other measurements such as the molded fiberglass base on the deck under the hatch, and the teak frame that the hatch rests on. If you need more than what is shown here just let me know. To make sure I was clear in the drawing, the 1-7/8" side measurement does not include the plexiglass that rests on the frame. It is just the frame itself.
__________________
Hal
BLACK EYED SUSAN
Grand Banks 42 Classic
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06-05-2022, 06:54 AM
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#8
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Guru
City: Jupiter, Florida
Vessel Name: Black Eyed Susan
Vessel Model: Grand Banks 42' Classic
Join Date: Nov 2016
Posts: 1,644
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Forgot to mention..thanks for helping point out something I missed when varnishing. Just when I think I got it all under control....
__________________
Hal
BLACK EYED SUSAN
Grand Banks 42 Classic
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06-05-2022, 10:20 AM
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#9
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Member
City: Denver
Vessel Name: Ottelia
Vessel Model: Grand Banks 42
Join Date: Dec 2021
Posts: 16
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Hal, Thanks for the meticulous answer and picture. I had thought my hatch was original but obviously it was not being a Lewmar aluminum hatch. I've only owned the boat for a few months so lots to learn!
Rob
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06-05-2022, 12:53 PM
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#10
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Guru
City: Jupiter, Florida
Vessel Name: Black Eyed Susan
Vessel Model: Grand Banks 42' Classic
Join Date: Nov 2016
Posts: 1,644
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Quote:
Originally Posted by Rob R
Hal, Thanks for the meticulous answer and picture. I had thought my hatch was original but obviously it was not being a Lewmar aluminum hatch. I've only owned the boat for a few months so lots to learn!
Rob
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You are welcome. I would want exacts if I were ordering a hatch without looking at my boat. I imagine that the base for the hatch, the base that is molded into the deck on an '86-'87 GB42, would be the same no matter which hatch was placed on it. I have those measurements as well if you need them.
I can't imagine living that far from my boat!!
__________________
Hal
BLACK EYED SUSAN
Grand Banks 42 Classic
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