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Post by fma on Sept 28, 2021 22:08:30 GMT
Just run into this and have say a little disconcerting feeling water squish under your feet! Stuck an endoscope into the upper limber hole and found a drain hose ~1/2 inch off the hull which I assume is meant to connect the upper limber hole to the bilge under the engine. In my case, water is entering the limber hole and then heading straight down grade (toward midships) between the hull and liner where it collects by the engine cooling intake (same as the OP), and probably being like this since new. Plan on adding a "bung" and flange into the limber hole with a small hose I can insert into the current internal hose in the frame so water correctly drains into the bilge and not between the liner (sort of thing you use in home brewing). Still debating how to remove the trapped water. As I'm soon swapping the engine thru-hull/valve I may wait to see if I can get between the hull and liner with the the-hull removed, if not I guess it will be some careful surgery on the liner.
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Post by fma on Feb 1, 2022 3:04:43 GMT
To close the loop on this - I cut a hole into the liner with a Dremel and vacuumed out a fair amount of water but overall pretty much a non event and seems fairly common.
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Post by zaphod on Feb 1, 2022 5:19:40 GMT
Did you inject anything to fill the void?
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Post by fma on Feb 1, 2022 5:42:53 GMT
No, the "void" it's a moulded and raised part of the liner there by design (2 raised channels) or so it appears. I suspect it's meant to drain forward and ultimately into the bilge, but sealant/glue (or something) around the raw water intake where the liner and hull met blocked the passage way. From what I hear it's usually this exact frame (raw water engine intake) with the issue. At first I was a little worried, but now I've opened it up and even put camera down there its obvious where the water is coming from and I'm not concerned.
What did surprise me is the hull is only ~10mm thick where the engine raw water intake thru-hull is, which seems terrifyingly thin, but I guess as designed.
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Post by Mistroma on Feb 2, 2022 16:22:40 GMT
No, the "void" it's a moulded and raised part of the liner there by design (2 raised channels) or so it appears. I suspect it's meant to drain forward and ultimately into the bilge, but sealant/glue (or something) around the raw water intake where the liner and hull met blocked the passage way. From what I hear it's usually this exact frame (raw water engine intake) with the issue. At first I was a little worried, but now I've opened it up and even put camera down there its obvious where the water is coming from and I'm not concerned. What did surprise me is the hull is only ~10mm thick where the engine raw water intake thru-hull is, which seems terrifyingly thin, but I guess as designed. I replaced the intake several years ago and also remember thinking the hull was incredibly thin at that point. I don't even remember it being as much as 10mm, more like 5-6mm. I could well be wrong about the thickness but it left a lasting impression about how thin the hull was in that area. Certainly not any more than 10mm as you found.
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mic98034
Junior Member
Posts: 11
Jeanneau Model: 39i
Home Port: Puget Sound, WA
Country: USA
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Post by mic98034 on Jun 2, 2022 18:44:23 GMT
I have a 39i, too. A two cabin version. (so I couldn't quite relate to your first photo). And I also have water under the liner. I have not! been able to figure out where it is coming from. I wondered if maybe the hull was cracked where the keel is attached (yikes!). So thank you for posting. You've given me a couple of ideas to check.
I also replaced my raw water through hull and valve when the right angle fitting at the top broke off in my hand. Corroded from the inside after only ten years. Obviously not the best marine bronze. And the valve was really hard to operate. I replaced with a TruDesign (in the US the distributor is GemLux). Love it! No corrosion issue and easy to operate.
Yes, crazy thin hull there. Mine was 1/4 inch. So I epoxied in a 1/2 inch thick backing plate made of G10. Now it's bomb proof.
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bwoyat
New Member
Posts: 4
Jeanneau Model: 2005 Sun Odyssey 49
Yacht Name: Nova Zembla
Home Port: Vancouver
Country: Canada
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Post by bwoyat on Jun 4, 2022 14:38:07 GMT
I have the same problem underneath the port side liner. The water is fresh and the source has been driving me nuts. But I suspect its coming somewhere around the shower drain fitting or drain hose from the aft port head. I'm going to check all the plumbing and faucets for leaks and work down to the drain...there's not much plumbing in the area of the boat. Also will be checking the fridge and freezer drain hoses...
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Post by kula on Jun 7, 2022 9:12:14 GMT
I have the same problem, I have a 2005 Jeanneau 40.3.
The amount of water that accumulates can vary, but on bad days it can be up to 5-8 liters (1.3 gallons) of salt water a day, I have now switched all through hulls and sincerely hope it helps. i've been through it all and simply can not understand where it's coming from.
are there any who have ideas, I will be happy
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Post by dbostrom on Jun 7, 2022 21:05:27 GMT
Kula, we had a small exhaust leak that produced those symptoms. Not enough actual gaseous exhaust to be smellable, but sea water weeping at the inlet to the muffler/waterlock. From there it made its way forward, traveling beneath the liner, to the floors w/keel bolts and eventually to the sump. Not at all obvious until I took a very close look having exhausted (sorry!) all other possibilities.
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SaltyDog
Junior Member
Posts: 12
Jeanneau Model: 39i
Yacht Name: SaltyDog
Home Port: Bruinisse
Country: Netherlands
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Post by SaltyDog on Aug 10, 2022 19:09:22 GMT
Exact same problem on my 39i: after forgetting to put in the depth sounder when being launched early spring, there was quite some water in the boat to get rid of. Once I got rid of all of it I noticed the sloshing sound of water in the same spot as you.
So I drilled an 8 mm hole but in a small hose with a foot operated drinkwater pump at the end to get the water out. To make sure it stays dry I put a cotton rope in the hole, so its capillary effects sucks up any water in that area and leaves it to dry in he top end of the rope. The cotton rope is permanently there, yet if in the future the problem repeats, I know what to do, but so far it is as dry as Santa's ass.
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