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02-26-2019, 09:35 AM
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#1
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Newbie
City: Florida
Vessel Name: Southern Latitude
Vessel Model: 390 Mainship
Join Date: Feb 2019
Posts: 2
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2000 Mainship 390 hatch gaskets
Does anyone know which gasket fits in the channel in the hatch lids? I have a 2000 Mainship 390. All three hatch covers have solid smoked plexiglass hatches. There is a channel in the plexiglass where the gasket fits into.
Thanks
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03-02-2019, 07:59 AM
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#2
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Veteran Member
Join Date: Apr 2011
Posts: 77
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Hi, welcome to the forum.
I have the same hatch lids on my 2003 390. The gaskets, which I believe to be original, is simply round crossection "O" ring material cemented to the plexiglass. The material is quite pliable, and reminds me of screen door "spline". If memory serves correctly (the boat's shrink-wrapped right now), its about 1\4 - 5\16" dia. None of it has ever come adrift in the 11 years we've had the boat, a testament to the attachment method! The channel is very shallow on our lids, looks like just a guide to placement of the gasket.
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03-02-2019, 08:06 AM
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#3
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Guru
City: gulf coast
Join Date: Jun 2014
Posts: 3,440
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Look for the hatch makers name on the hatch and order the part
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03-02-2019, 08:58 AM
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#4
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Guru
City: Annapolis
Vessel Name: Ranger
Vessel Model: 58' Sedan Bridge
Join Date: Aug 2013
Posts: 7,088
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They may be Bomar hatches, and if so, Bomar/Pompanette can get you what you need. You might be able to match profile/specs by comparing to pics on their website. I've found their customer service people helpful by phone.
-Chris
__________________
Chesapeake Bay, USA
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03-02-2019, 09:16 AM
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#5
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Veteran Member
Join Date: Apr 2011
Posts: 77
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Mainship’s own??
I don’t recall seeing any identification at all on these lids.....my belief is Mainship went their own way here. They’re just a plexiglass panel, two hinges and two draw-down handles. No frame of any kind.
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03-02-2019, 09:25 AM
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#6
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Senior Member
City: Boston
Vessel Name: Rose Mary
Vessel Model: 42 Grand Banks Motoryacht - 1985
Join Date: Feb 2017
Posts: 271
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If you can't find the specific manufacturer's model, you can get a more general gasket.
We've done a lot of custom windows and use Trim-Lok gaskets which are the EPDM foam rubber - the same stuff on your car door. It's very UV resistant, and quite soft so compresses well. I'm guessing your application uses the D-shaped bulb - you can buy it on Amazon.
They have two adhesives, a BT and an HT. The BT is a 3M product that creates a moisture barrier and it is ridiculously strong - probably last for a decade. The gasket comes in a single long strand, so if you're doing a hatch or a window, you'll cut it to length, apply it, and have the two free ends come together (preferably where there is the least chance of water intrusion, on the top side of the window for example). Cyanoacrylate superglue is the best adhesive to attach the two free ends together to create a continuous gasket. Works best if you also buy the primer for the glue.
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03-02-2019, 09:35 AM
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#7
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Senior Member
City: Boston
Vessel Name: Rose Mary
Vessel Model: 42 Grand Banks Motoryacht - 1985
Join Date: Feb 2017
Posts: 271
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Here's an example of it in action on a beautiful day like today.
The gray is the spacer between the panes on the double pane window. The black is the 3/8 D-shaped bulb gasket from trim-lok.
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03-03-2019, 02:46 PM
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#8
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Senior Member
City: New Rochelle
Vessel Model: Mainship Trawler
Join Date: Aug 2015
Posts: 113
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Westiculo
It looks like you leave your boat uncovered in the water during the winter.If so how long have you been doing this and have you had any trouble doing it .Tom
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03-03-2019, 07:39 PM
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#9
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Senior Member
City: Boston
Vessel Name: Rose Mary
Vessel Model: 42 Grand Banks Motoryacht - 1985
Join Date: Feb 2017
Posts: 271
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Quote:
Originally Posted by tomsboat
It looks like you leave your boat uncovered in the water during the winter.If so how long have you been doing this and have you had any trouble doing it .Tom
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No trouble. This is our second winter. We are partially wrapped right now - the flybridge and aft deck are wrapped but not past the windows. I work from home a lot and don't like being in a plastic bag. We've done a lot of work on the boat. Also we'll take it out in the harbor during the winter once in a while - it's peaceful. We shovel the side decks right away so that snow doesn't sit on them. We put in custom double-pane windows and insulated all the ceilings and 70% of the walls. Diesel heater keeps it toasty.
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