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Old 21 October 2010, 15:46   #11
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I had an Avon Adventure with the same problem.
My solution was to fit an extra long bung in the transom. As I remember it was at least 3 inches long. This seemed to fix it. It appears that the bung fitted as standard allowed sea water leakage past it.
The precise model was one that replaced the "bung it in and fold it over" type (plastic) with one that screwed in and was made of brass.
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Old 21 October 2010, 15:54   #12
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that is a lot of water, even for scotland! for rain to have been the cause through deck fittings.

i think the best case scenario would be the bung/bung fitting has a problem or there is a big problem there-either way it isn't your problem so let us know how you fair with your dealer and what it turns out to be.

since 2 boats have the same problem i'd think both need the bung mech replaced. i can't imagine both have serious problems let alone one.

my 560 adventure-diff hull-stays dry completely. longest i've left it afloat is 3 days though fyi.

cheers
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Old 21 October 2010, 17:38   #13
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It sound like the hull drain bung is leaking under water pressure.

You could get the hull pressure tested to see if it's the deck fittings that are causing the leak.
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Old 21 October 2010, 18:04   #14
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Or try what I did-get the boat on the trailer so it's bow down,squirt a load of water into the underfloor of the hull with a hose,then follow it up with 4 bottles of red or blue food colouring. Stick the bung back in, hose off the excess food colouring (there's always some), wind the jockey wheel up 'til the bung is the lowest point and wait to see if/where the coloured liquid leaks out.


You need to thoroughly flush the coloured liquid out immediately afterwards though.
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Old 21 October 2010, 20:20   #15
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Quote:
Originally Posted by HUMBER P4VWL View Post
on our Humber OP the deck drains to a well at the back where there is a float switch/pump.

The inner hull has a bung in the bow anchor locker and a bung at the back to drain in to the aformentioned well.

If we leave both bungs in, the bow anchor locker fills with water over a few weeks of rain and on arrival we have to unplug the bung to let it drain through to the rear well.
My Destroyer was like that except that the anchor locker bung leaked and so did the one in the well (albeit slowly) so I used to leave them both out all the time otherwise the hull just filled up when it rained.

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You need to thoroughly flush the coloured liquid out immediately afterwards though.
Otherwise when you put the bilge pump on it'll look like the Red Arrows just went past
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Old 21 October 2010, 21:50   #16
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My Hurricane has always had the same problem. Initially I took it back to the dealer where they resealed everything they cold find to reseal. It didn't solve the problem and I learned to live with it. I store my boat dry so it isn't a big deal unless we are away camping for several days. If I am on the water all day, I might drain 1 or 2 litres of water tops.

My belief is that the water is getting into the hull from the engine well somehow, but I can't really access the area. (The engine well will get water into it from the trunks if they aren't all the way up

I will point out that I picked up my boat used after it was flipped by the previous owners... a Police Marine Unit. They kept the boat in the water and my understanding is that the boat flipped end over end when they stuffed it with a hull full of water and under-inflated tubes.
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Old 22 October 2010, 10:17   #17
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Quote:
Originally Posted by Stoo View Post
a Police Marine Unit. They kept the boat in the water and my understanding is that the boat flipped end over end when they stuffed it with a hull full of water and under-inflated tubes.
The day pigs flew, eh?
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Old 24 October 2010, 15:34   #18
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I got a couple of plumbing fittings and t piece and screwed a presure gauge on one end and a pump fitting on the other and screwed it in . then pumped it upand waited no problem it kept the pressure, so i wonder i can leave some pressure in cant leak in then but id have to make a differant fitting then .. avon 560 very happy with it,for what i do....exept of course that cheap plastic bung. now fixed a new brass one.......cheers
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Old 28 October 2010, 11:55   #19
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The day pigs flew, eh?
LOL... So it seemed. There was three of them launched I understand. It probably would have been fairly entertaining to watch. Fortunately, only their pride was injured.

I've since run into one of the officers that was on board that day and he was pleased to see "his" abandoned boat was still in service.
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Old 29 October 2010, 06:20   #20
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Assuming it's the bung, I had the same problem on a Laser dinghy. by smearing the bung threads / seal area with petroleum jelly (AKA vaseline - don't tell Mrs 9D where I got it from ) cured the leak instantly. Same with the threads on the storage bucket hatch. I now do te same with the big brass screw bung on the humber.

It;s quite easy to get a shrader valve out an old bike inner toob & mount it in a similar bung, I made one for testing bouyancy tanks on dinghies, but it works equally well for rib hulls!

The fact it's salt water shouts "bung", but it's a rib, any water is going to be salty, even if just because the rain washed the dried salt from the last trip off the floor / toobs ......
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