Through Transom Scupper on 26M

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Piddle and Futz
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Through Transom Scupper on 26M

Post by Piddle and Futz »

Hey all,

So tired of clogging drain in the engine well on our 26M.

We are thinking of installing a simple through-transom scupper valve (~1.5" diameter). Seems like such a simple and obvious fix, I'd be surprised if no one else has done the same.

Open to all advice.
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NiceAft
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Re: Through Transom Scupper on 26M

Post by NiceAft »

Any drawings available, or photo of product you are thinking of?

I saw this from 2018:
Re: Scupper drainage
Unread post Wed Aug 01, 2018 1:57 am

mine bugged me so much, i cghanged it all, i put another thru hull- cant remember if it was an inch or 1.25 " on the transom, next to the existing one.
then i put a thru hull fitting in the motor well- cut out the other pathetic fitting, and just plumbed a straight line from the well top the outflow- and plumbed the sink to its own dedicated thru hull- and upgraded its size at the same time, and the hose from the sink to the thru hull.
so now if i blast the motor well fitting, it doesnt blow back up the sink, and the sink drains better too!
Ray ~~_/)~~
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Piddle and Futz
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Re: Through Transom Scupper on 26M

Post by Piddle and Futz »

If someone had done it, I was going to ask for recommended parts.

I've been looking at something like this:
https://thmarinesupplies.com/products/r ... per-drains

Of course, I'd want to lay in a coat of epoxy or 3M 5200 in the hole to ensure I wasn't creating an opportunity for water ingress between the shells.
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Piddle and Futz
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Re: Through Transom Scupper on 26M

Post by Piddle and Futz »

If I wasn't clear, I'm looking to directly penetrate the transom at the bottom the well where the motor is mounted. . No tubing, just a direct discharge.
OverEasy
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Re: Through Transom Scupper on 26M

Post by OverEasy »

The addition of a scupper through transom fitting like you describe is gonna leave an inch or more of water in the motor well to become a standing pond for aquatics. It’s a bit of a radical approach that will still get clogged but it’s you boat and your rules.

If what you’re concerned about is a clogging motor well drain then might I suggest something as an alternative? How about a screen to keep the crud out of the drain in the he first place like this:

Image
Macgregor Mods » Miscellaneous » Motor Well Drain Screen

We did this mod a while back on our Mac26X and it has made a night/day difference. It does a fantastic job of keeping the Live Oak leaves, acorns, pine straw and other debris out of the drain line.

Just a suggestion… Your boat/Your rules

Best Regards,
Over Easy 😎😎🐩🐈
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Piddle and Futz
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Re: Through Transom Scupper on 26M

Post by Piddle and Futz »

Love that simple solution!

Thanks so much.
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Jimmyt
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Re: Through Transom Scupper on 26M

Post by Jimmyt »

Piddle and Futz wrote: Sat Nov 26, 2022 7:51 pm If I wasn't clear, I'm looking to directly penetrate the transom at the bottom the well where the motor is mounted. . No tubing, just a direct discharge.
We had a ski boat that had a motor well drain like you are considering. It did not incorporate any backflow prevention, though. It was a drain plug through hull without a drain plug in it.

The scupper through hull you are considering should work nicely. You are spot on with coating the hole with epoxy before installing the through hull.
Jimmyt
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2013 26M, Etec 60, roller Genoa, roller main
Cruising Waters: Mobile Bay, Western Shore, Fowl River
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Ixneigh
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Re: Through Transom Scupper on 26M

Post by Ixneigh »

That was me. It works well. I used the best fittings possible and did not install a seacock. I tried the strainer but that got clogged with pet hair

Ix
"Shoal Idea"
2011 M, white
Etec 60
South Fl.
OverEasy
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Re: Through Transom Scupper on 26M

Post by OverEasy »

What kinda pet has enough shedding hair to clog a strainer???
A Wooky? :D :D

With the one we made and posted (above) we have had the engine bowl filled a solid inch or two thick with pine needles, leaves and acorns and it still drained without hesitation without and crud getting in the drain line.
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Ixneigh
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Re: Through Transom Scupper on 26M

Post by Ixneigh »

Two Pomeranians
"Shoal Idea"
2011 M, white
Etec 60
South Fl.
OverEasy
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Re: Through Transom Scupper on 26M

Post by OverEasy »

:D :D Small Wookies! :D :D

Image
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