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Old 02 September 2009, 05:32   #1
Country: UK - England
Town: Winchester
Boat name: Raven
Make: Westerly 33/Avon 310
Length: 5m +
Engine: Mercedes 42 Toh9.8
Join Date: May 2009
Posts: 265
2 X 25Ltr Petrol Tanks

Hi Guys

Just getting used to my new Solent 5.4. Bl**dy love it, Solent have done a wonderful job.

I am using it with 2 x 25 litre fuel tanks which is the only weak point of the whole rig really, my question is has anybody linked two or more tanks so when one runs dry the other one kicks straight in seamlessly?

I was thinking of a simple Y connection, does the panel think this would only work with taps on each end making it all easier to use but not exactly a seamless change over.

Or has anybody been here before and done something I have not yet thought of?



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Old 02 September 2009, 05:41   #2
Country: France
Town: Nantes
Boat name: A l'Attaque
Make: Sea-Way
Length: 6m +
Engine: Not here yet
Join Date: Aug 2007
Posts: 455
I considered buying one of those. Seems like a good choice.

I currently have 2 x 25L in the console of my Humber 5.3 with a switch in between the 2. It's not completely seemless but if I switch tanks as soon as the engine starts spluttering I can sometimes keep going without stalling.

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Old 02 September 2009, 05:43   #3
chewy's Avatar
Country: UK - England
Town: Up Norf
Make: Avon SR4,Tremlett 23
Length: 4m +
Engine: Yam 55, Volvo 200
Join Date: Apr 2007
Posts: 5,217
I've got two tanks, when the first runs out I know its time to turn around and head home.
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Old 02 September 2009, 05:46   #4
Country: UK - Wales
Town: Here
Boat name: doggypaddle
Make: Avon 5.4 Searider
Length: 5m +
Engine: yamaha 80
Join Date: Jul 2007
Posts: 1,107
you can just use a y piece and no taps, the fullest tank will preferentially empty and syphon into the emptiest so in effect they become one tank. fine as long as the tanks are next to each other, otherwise if one is lower than the other you will syphon into the lower one overfilling and spilling it.
It works fine with 3 barrus tanks side by side on my SR.
trouble then is no reserve........
I am usually not as green as i am cabbage looking.
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Old 02 September 2009, 06:01   #5
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,538
I'll second Chewy on this one!

Other option to give you about 20% more time before changeover would be to replace them with twin 30L I have that with the two of them side by side under the engine. It's not the tidiest of solutions, but it works.

Realistically tho' unless you play in the wakes of the ferries in Southampton harbour entrance or a fast flowing rock filled estuary where it conking out would be properly dangerous, is a hose change really an issue? When my first tank dries I can have the engine running again in under 30 seconds.

Yeah, It's a minor hassle, but also means should one of your tanks get "posoned" (e.g by sucking water in through the air vent) you still have a "clean" supply to get you home. Combining them with syphoning etc you could end up poisoning both.
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Old 02 September 2009, 07:59   #6
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
You need an 'L port changeover valve' which enables you to swap between tanks by turning a lever 90 degrees.

Available from:
Do a search on 'L port valve'

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