Author Topic: Aft cockpit hatch  (Read 1095 times)

Venti

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Aft cockpit hatch
« on: September 05, 2017, 03:32:09 PM »
Aft storage hatch in the cockpit fills with water every time it rains. Is this a problem with the gasket or something else. It seems to be tight when locked down.

Travis Gregory

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Re: Aft cockpit hatch
« Reply #1 on: September 07, 2017, 09:49:59 PM »
my theory is that the lid is warped (mine does the same).  Also the caulk on the frame of the hatch may be the culprit.  Others in our local fleet have resolved the issue by re-bedding.

Don Corey

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Re: Aft cockpit hatch
« Reply #2 on: September 19, 2017, 08:03:04 PM »
OK, non of the above.  This hatch was designed to be installed in a vertical position.  It's not waterproof.  USI did build a few boats with the proper cockpit hatch.  Unfortunately there are no waterproof ones that will replace that size hatch.  My solution is buy a 4' piece of clear vinyl carpet runner material from Home Depot and cover the hatch, works great.
Don Corey   #25  fore 
U20 Class member since 1997

Travis Gregory

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Re: Aft cockpit hatch
« Reply #3 on: September 20, 2017, 10:59:00 PM »
Good to know Don!  I was all set to re-bed mine this winter.  I'll move on to projects with more potential for success.


Venti

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Re: Aft cockpit hatch
« Reply #4 on: September 21, 2017, 07:16:27 AM »
Thanks Don! Will try this weekend.

Bob Abelin

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Re: Aft cockpit hatch
« Reply #5 on: October 26, 2017, 11:33:59 AM »
The old Bomar hatch in my cockpit was leaking really badly, it's about 14x31 in size.  After some research I concluded as well that this hatch was never designed to sit flat in a cockpit.  After look around I came across a Tempress 1330 hatch with has just about the same cutout dimensions as the Bomar and is designed for this type of installation.  I plan to tape the old Bomar shut for the winter and then replace the hatch with the new Tempress in the spring.

Pterobyte

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Re: Aft cockpit hatch
« Reply #6 on: March 23, 2018, 04:39:38 PM »
The old Bomar hatch in my cockpit was leaking really badly, it's about 14x31 in size.  After some research I concluded as well that this hatch was never designed to sit flat in a cockpit.  After look around I came across a Tempress 1330 hatch with has just about the same cutout dimensions as the Bomar and is designed for this type of installation.  I plan to tape the old Bomar shut for the winter and then replace the hatch with the new Tempress in the spring.

Did you get the hatched replaced.  I'd like to swap ours out if it fits.  It looks a tad small from here.
Jim
#75 Smoke

Bob Abelin

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Re: Aft cockpit hatch
« Reply #7 on: March 23, 2018, 08:43:38 PM »
Aft storage hatch in the cockpit fills with water every time it rains. Is this a problem with the gasket or something else. It seems to be tight when locked down.

Working on it!  The Tempress is actually a pretty close fit but will need some extra steps to make it work.  If the Bomar didn’t have an extra cutout around the hinges it would have been easier.  I’ll write up a ‘how to’ post when I get it done. 

Dean Nelson

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Re: Aft cockpit hatch
« Reply #8 on: March 26, 2018, 01:28:47 PM »
A few years ago, I replaced my rear hatch with a Tempress 13" x 23" cam-latch hatch (9-1/2" x 19-1/4" hatch opening), model 1954924.  Works great!  I recommend the cam latch over the slam hatch.  Apply a bead of silicone caulk to the bottom lip of the hatch before installing.   

Bob Abelin

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Re: Aft cockpit hatch
« Reply #9 on: May 01, 2018, 09:09:51 AM »
Several people asked what kind of hatch I installed in the back of my boat so I figured I’d write up a short tutorial about how I did it.  It’s not very challenging, but there was a bit of a trick to doing it right.

First off, how do you know if you need to replace your back storage hatch?  Here are some tips:  Is it leaking?  If yes get a new hatch.  Is it the stock Bomar hatch?  If yes get a new hatch.  I know that sounds a bit harsh, but those Bomar hatches should never have been installed in the floor of the U20.  They are fine hatches, but the specs for that hatch say “Not waterproof on horizontal installations” which is why they all eventually leak.  The Lewmar and Tempress hatches are designed to sit flat and shed water, keeping them from leaking as much.

The hatch I went with was the Tempress 1330 which is just slightly smaller than the stock Bomar.  It sits in the existing cut-out without any modifications and covers the old bolt holes.  But it’s not a perfect fit, the dimensions of the Tempress are about an inch less than the Bomar.  This works, but puts the attachment holes very close to the edges of the existing cutout.  There are also some extra hinge cutouts on the Bomar that the Tempress won’t fully cover.

How do we solve this issue?  With a custom made flange that fits underneath the cutout which the Tempress can bolt through.   How do you make this custom flange?  Good new, you already have it!  The flange is just the outside frame of the old Bomar hatch.  Simply pull off the old hatch door and cut the rim so that it will sit flush under the deck below the new hatch.  The old frame will also fill in the gaps where the old Bomar hinges were.  I had to adjust the flange a bit to make the Tempress fit, but ultimately it worked very well and made for a nice secure and waterproof fit.   It looks pretty good too.