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Old 06 November 2012, 10:58   #11
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In the later of the two examples is that two parts that join together in the transom
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Old 06 November 2012, 13:24   #12
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Quote:
Originally Posted by Ribstore View Post
Looks like the diaphragm is missing...see here and here for examples.
In the later of the two examples is that two parts that join together in the transom
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Old 06 November 2012, 20:40   #13
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FWIW I have a Zodiac and when I replaced the diaphragm, of which you are missing, it had a larger stem which required I drill the hole out ever so slightly.

I put a 3" elephant trunk in to drain the deck and have nothing but good things to say about it. We drag a fair amount of water into the boat with our drysuits (Pockets mostly) and scuba gear, and it is nice to be able to drain gallons of water quickly. I also have a bilge pump to drain below the deck but that is mostly to lose weight for beach recovery.

If it were me I would like to know what is below that plug between the hull decks. If it is foam filled, then a drain isn't needed, but if not...maybe it should be foam filled, or at least have the capability to be drained.
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Old 07 November 2012, 08:36   #14
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My rib exits water through diaphragm very poorly if rib is moving at plane, if throttling down to maintain bow rise while moving forward water exits much faster.

If water valve is in general good condition, just replace the middle diaphragm, if the stem fits thight in small middle hole much better, before inserting apply some grease to slide while pulling it from inside of rib. If stem has side play eventually will lose it while water flow exits diaphragm. The thinner the diaphragm, will seal the better.

Happy Boating
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Old 07 November 2012, 10:15   #15
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Quote:
Originally Posted by Peter_C View Post
FWIW I have a Zodiac and when I replaced the diaphragm, of which you are missing, it had a larger stem which required I drill the hole out ever so slightly.

I put a 3" elephant trunk in to drain the deck and have nothing but good things to say about it. We drag a fair amount of water into the boat with our drysuits (Pockets mostly) and scuba gear, and it is nice to be able to drain gallons of water quickly. I also have a bilge pump to drain below the deck but that is mostly to lose weight for beach recovery.

If it were me I would like to know what is below that plug between the hull decks. If it is foam filled, then a drain isn't needed, but if not...maybe it should be foam filled, or at least have the capaIbility to be drained.
I would also like to no know what is in the void between the hull and deck ,I think its time to get drilling.
Also what is snap elephant trunk.
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Old 07 November 2012, 10:20   #16
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Quote:
Originally Posted by Locozodiac View Post
My rib exits water through diaphragm very poorly if rib is moving at plane, if throttling down to maintain bow rise while moving forward water exits much faster.

If water valve is in general good condition, just replace the middle diaphragm, if the stem fits thight in small middle hole much better, before inserting apply some grease to slide while pulling it from inside of rib. If stem has side play eventually will lose it while water flow exits diaphragm. The thinner the diaphragm, will seal the better.

Happy Boating
I think I would like to fit a larger drain as no matter what speed i was going it seemed as though it was just not draining at all.
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Old 09 November 2012, 12:08   #17
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These worked well on my boat, less messy than elephant trunks.
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Old 09 November 2012, 12:59   #18
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Quote:
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These worked well on my boat, less messy than elephant trunks.
Just fitted those on mine but yet to see if they are ok. Saying that they've been fine on other boats I've seen them on.
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Old 09 November 2012, 15:19   #19
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Those scuppers above have been known to sink many a boat, if they are not well above the water level. In fact there was a post on here recently of someones, RIB putting the engine underwater from scupper failure. An elephant trunk is not very expensive, and much less likely to fail.
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Old 09 November 2012, 17:31   #20
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This is relevant to this thread. Inflatables are pretty much unsinkable, but still sinkable enough to cause damage.
How to Prevent Your Boat from Sinking: Boats and Yachts Maintenance and Troubleshooting :
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