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Old 22 December 2003, 08:11   #1
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Country: UK
Make: Ribcraft
Length: 4.8m
Engine: Mercury F60 EFI
Join Date: Dec 2003
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What's this?

What is this tubing used for? I have seen on other inboard RIBs, cooling water for the engine comes out of the tube, but what use does it have on a small outboard RIB? Is it 'elephant trunking'?

Sorry if this is an obvious question - First RIB and still learning the ropes!

Robert

(Hopefully there is a picture here)
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Old 22 December 2003, 08:23   #2
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Country: UK - England
Town: Midlands
Make: Nautique
Length: 6m +
Engine: PCM 5.7l
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Yes, the black tube is an elephant trunk.

Post some more pics of the boat!
We wanna see it, not just its backside.

What engine is that?
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Old 22 December 2003, 08:36   #3
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What does an elephant trunk do?

Its a Mercury 60hp FourStroke EFI.

Here's a better picture of the RIB...
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Old 22 December 2003, 09:03   #4
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Country: UK - England
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Boat name: S.S. Nobstick
Make: Three Wise Monkeys
Length: 3m +
Engine: 44lbs of thrust....
Join Date: Nov 2003
Posts: 2,115
The "Elephant's trunk" is a self bailer. When you have the boat at a sufficient speed you lower the trunk and the pressure difference between the water in the hull and the lower pressure zone created at the transom forces the water out of your RIB. I think that's how it works anyway..... could just be magic really....
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Old 22 December 2003, 12:45   #5
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Country: UK - England
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Nice setup!!!!!!!

As for the trunk its nothing special.
You just lower it down into the water when your going along and all the water pours out the back.

The reason its not just a hole is so that you can leave them down all the time and it will only take on water slowly. Better off pulling them up at all times unless your cruisign for ling periods with a chance of taking on a lot of water.
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