dmeadow@juno.com wrote:
>
> The answer is yes, you can put the fuel pumps "in-line." I know people
> that use exactly the setup you describe. If the SU fails, they just
> switch the wires to the other pump. If I recall, one individual already
> has the backup wired with a switch, so when (not if) the SU fails, all he
> does is switch it off and switch on the backup. Since I enjoy crawling
> under the car by the roadside with semis flashing by, I use the old
> method of carrying an extra pump ;-)
>
> David Littlefield
> Houston, TX
>
> On Fri, 14 Mar 1997 10:53:04 PST dfdarby@juno.com (David F. Darby)
> writes:
> >Ladies and Gentlemen:
> >
> >This is a deviation from the actual question at hand, but I have been
> >wanting to ask this for some time as it bears on an emergency fuel
> >pump system I would like to setup.
> >First, forgive me for not completely understanding the inner workings
> >of
> >these pumps. We have two types of electric fuel pumps from which to
> >choose for our LBCs: the traditional Skinners Union type with contact
> >breakers either in positive ground (earth) or negative ground and the
> >electronic breakerless variety.
> >Now, my questions: in the event of pump failure, would another pump
> >mounted inline, either pushing or pulling, move fuel through the
> >disabled pump and thus keep the fuel system operative? Would the
> >non-functioning pump's diaphragm effectively act as a check valve and
> >not allow fuel through? Has anyone tried this?
> >Thanks for your consideration.
> >
> >David F. Darby
> >Hercules Wilderness, MIssouri, USA
> >MGAs, MGBs
> >
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