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Old 11 February 2003, 16:24   #11
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Hi folks

Just a thought, most fuel lines have connectors with spring loaded sealing ball to stop the petrol leaking OUT.

It would not much suction to pull IN this sealing ball and get air is the system.

In this way the seal is trying to work wrong way round

Regards Gary
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Old 11 February 2003, 19:54   #12
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Quote:
Originally posted by Garygee
Just a thought, most fuel lines have connectors with spring loaded sealing ball to stop the petrol leaking OUT.
It would not much suction to pull IN this sealing ball and get air is the system.Regards Gary
If you need the amount of suction required to open the spring you also need :-
I) a larger diameter fuel feed system ;
II) a new fuel pump in a few hundred miles:

Orrr maybe you're spring's bust ?
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Old 12 February 2003, 12:12   #13
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The ball is held open by the brass rod on the male connector, how ever on a rib with a big petrol engine the point of having large fuel lines is a very valid point

Pete
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Old 12 February 2003, 14:45   #14
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Ok, its sorted. A 3 way cock valve will be inserted inline from the main tank, hence the main tank has the best fuel flow to the engine. Backup tanks on the deck will each have a female yam fuel conntector, and I will dangle a tail with a male connector from the fuel cock. This will alow the switching in of a single tank. These tanks can be unplugged and swaped as required.

However:

Its not likely that these 30l deck tanks will give as much fuel flow as the main tank and so I expect to loose top end and maybe some pickup. For cruises this will not matter.

I think I have also solved the loss of 500rpm off the top end of my other boat ... started last year just after I added connectors inline so that I could flow the deck tanks through the water serperator/filter. The problem - FUEL FLOW!! The connectors restrict the flow at max performance.

Its been an interesting journey! But it's solved now. Thanks for all the advice.
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