Although the Originality Police might have me shot, I have changed over to
an electric pump, with wonderful results. As most SU's tend to leak a bit
while inactive, the fuel levels in the bowls usually are not sufficient for
quick starting. You end up running the starter just to refill the fuel
bowls, putting a strain on a semi dormant battery. With an electric pump,
your can just turn on the ign. switch, wait a few seconds, and fire it up!.
Less battery strain, no danger of ruptured fuel pump diaphragm, ( and
resulting oil/gas mixing) and you can install a hidden switch to disable the
pump as a theft deterrent. I had the original mech pump self destruct: The
pivot pin worked loose, the actuation finger jammed the camshaft and the
last 4' of the camshaft fractured! So for a fuel pump failure, I got to
remove the entire front of the car, (TR3) top of the engine, and replace the
cam. The electric pump was about $ 40. The lesson learned was worth
thousands!
Bob Westerdale
-----Original Message-----
From: Mike Mason [mailto:mmason@lindenwood.edu]
Sent: Friday, February 25, 2000 10:15 AM
To: Bob Labuz
Cc: triumphs
Subject: Re: Any SU 6 Gurus?
Bob:
I have an aftermarket pump which doesn't have the little priming handle
(which I don't like, because if it ever goes out I am just dead! I have
managed on other occasions to make it home by pumping by hand and
driving a little ways) and I don't know if it has a pressure release.
Would make sense though.
Thanks. Any idea would help at this point.
Michael
On Fri, 25 Feb 2000, Bob Labuz wrote:
>
> Mike,
>
> I am not a TR6 expert, but could there be a problem with your fuel pump?
On
> TR3's, the mechanical pump has a pressure release valve to disable the
pump
> action when optimum fuel pressure is reached. I have never experienced
your
> problem in over 30+ years of TR3 and 4 ownership. I have experienced fuel
> starvation due to stuck valves in both the floats and fuel pump, but never
too
> much pressure. Again, I would check the fuel pump. Good luck!!
>
> Bob Labuz
> 1958 TR3A
> 1974 T140V
>
> Mike Mason wrote:
>
> > OK, I give up. The front float bowl, about fifteen minutes after you
shut
> > the car off, will hiss or "sizzle" and petrol will run out of the
overflow
> > tube. I have replaced the top, put in a new Gross Jet (both carbs), set
> > the float level within specs, and checked everything else I can think
of.
> >
> > I detached the emissions hoses thinking that maybe back pressure was
> > causing the petrol to pressurize and escape. These are Australian spec
> > carbs fitted to a '73 TR 6 so no jokes about the float bowls being
upside
> > down on this side of the hemisphere. I tried driving upside down and
that
> > didn't change anything!
> >
> > Any more ideas? I am tired of getting en miles to the gallon because
all
> > the petrol goes on the ground. Fortunately no fires yet!!
> >
> > Michael
> > St. Louis, U. S. of A. or thereabouts
>
>
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