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Thru hull picture

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Old 03-06-2018, 08:45 AM
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Default Thru hull picture

Wondering if anyone has seen or installed this before. No screws should be seen on the outside. Location is bottom of the boat about center on the hull just above the keel.
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Old 03-06-2018, 08:57 AM
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Other than the chipped paint looks like a pretty standard seacock install to me. You say 'no screws should be seen on the outside'. My guess is they are not screws but thru-bolts. They hold the seacock in place in case of a catastrophic thru-hull failure, meaning even if the thru-hull is sheared off, your boat doesn't sink, may leak a little, but won't sink.

I would definitely touch up all that chipped gel coat, and I'm assuming the screws were sealed with a proper underwater rated sealant? (NOT 5200)

If it were my boat, depending on what those thru-hulls are used for, I would have preferred to use one larger thru-hull and seacock and feed a manifold which all 4 lines would feed off of. That being said, other than personal preference, there is nothing inherently wrong with the pic.

The 4 thru-hulls in a line could possibly cause bubbles to be introduced. But if a scoop/strainer were added it would help with that. But if these are not high-speed pickups no scoop is necessary.

Bottom line, hard to advise on this much without knowing where those 4 lines go.
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Old 03-06-2018, 09:18 AM
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3 oval heads, 9 flat heads, quite a lot of corrosion, all four fittings have been plugged... what could possibly be wrong
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Old 03-06-2018, 09:34 AM
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If you google seacock installation, that is pretty much how they recommend doing it. But it looks like at least some, if not all, bolts are SS. From what I've read, bronze seacocks should only have bronze bolts (I'm assuming the thru hull and seacock are bronze).
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Old 03-06-2018, 09:47 AM
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So it looks like to me it is no longer in use. They appear to me like they are plugged. The prepurchase survey may reveal more. If no longer in use I should just remove and have it professionally repaired?
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Old 03-06-2018, 09:55 AM
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Originally Posted by seaducer1 View Post
So it looks like to me it is no longer in use. They appear to me like they are plugged. The prepurchase survey may reveal more. If no longer in use I should just remove and have it professionally repaired?
More information would be required, what are they supposed to be doing and are you interested in having that done. I think leaving them as they are would be a bad plan, mismatched metals and obvious corrosion not to mention the fact that they're not being used as their plugged.
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Old 03-06-2018, 10:04 AM
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Originally Posted by commuter boats View Post
3 oval heads, 9 flat heads, quite a lot of corrosion, all four fittings have been plugged... what could possibly be wrong
Gerald
lol, I didn't even notice the ovals! That is kinda janky.
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Old 03-07-2018, 02:34 PM
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Hasn’t sunk yet!
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Old 03-07-2018, 04:23 PM
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Originally Posted by seaducer1 View Post
Wondering if anyone has seen or installed this before. No screws should be seen on the outside. Location is bottom of the boat about center on the hull just above the keel.
That's how I have always seen them, thru-bolted to the flange inside the hull. It's usually a lot less obvious because they are usually covered by bottom paint.
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Old 03-07-2018, 04:52 PM
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I hope everyone is joking... Isn't that picture the outside of the hull?
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Old 03-07-2018, 05:11 PM
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Originally Posted by HeadHunt View Post
I hope everyone is joking... Isn't that picture the outside of the hull?

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Old 03-07-2018, 05:34 PM
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This site has some great write-up and pics about this.

This page and find seacocks to see a few of them.

Welcome To MarineHowTo.com Photo Gallery by Compass Marine How To at pbase.com
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Old 03-08-2018, 02:30 AM
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Who ever did this was a butcher and obviously didn't have a clue as to what they were doing.
IF they needed that much water, 1 larger seacock connected to a sea chest is the correct installation.
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Old 03-12-2018, 11:06 AM
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Originally Posted by keysdiver View Post
Who ever did this was a butcher and obviously didn't have a clue as to what they were doing.
IF they needed that much water, 1 larger seacock connected to a sea chest is the correct installation.
+1,000
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Old 03-12-2018, 01:19 PM
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usually a backing material is under the fitting, after the fitting is tightened to the hull you put 3 screws in the backing block. my suspicion would be no backing block was added to this area so they ran 3 bolts up from the outside of the hull and thru-bolted it to the seacock.
Ive never personally seen 3 installed back to back like that, combine that with the 2 other fittings right on the keep and ( just my opinion) a fair amount of structural integrity has been lost
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Old 03-12-2018, 03:31 PM
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Looking at those through hulls, I’d be suspicious of the rest of the boat.
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Old 03-13-2018, 04:15 AM
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Originally Posted by sharktripper View Post
Looking at those through hulls, I’d be suspicious of the rest of the boat.
I thought the same thing.....Considering this is "What yo can see" and not whaelse is hidden and going on. Really needs to be adressed. Also agree about the hull integrity. With all these holes being so close, not only structurally in question, but I also wouuld be concerned about water intrusion. Definatly needs to be repaired and re-plumbed correctly.
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Old 03-13-2018, 11:05 AM
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Originally Posted by HeadHunt View Post
I hope everyone is joking... Isn't that picture the outside of the hull?
Thanks, my thoughts exactly.

When working on the hull, 5 words you want to use as sparingly as possible: "Hand me the hole saw."
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Old 03-13-2018, 04:10 PM
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ugly job
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