[ROVERNET - UK] crook carbys
Barry Riseley
barry-riseley at trump.net.au
Mon Jan 10 00:11:49 GMT 2005
Hello Everyone,
I rather suspect that the SU Caries we are dealing with in this thread are
really of much later type/specification than the ones I am used to dealing
with.
For what it is worth though, I have experienced frustrating flooding of "H"
type SU's despite what I had thought to be thorough replacement and
adjustments "in the float bowl.
What I have found is that in these earlier type carbies, if there is
sideways movement on the needle actuating lever where it hinges onto the
float bowl cover, then it is possible for this lever to "stick.
Similarly, if this lever binds on the two little "posts" which hold the
lever pin, then the lever can bind.
The cure is to carefully adjust (bend) the two little "flaps" on the hinge
end of the lever, so that there is just clearance to allow free movement,
without sideways play.
I have a 1928 Austin Seven which has had an SU fitted, and until Boxing
Day, had this exact problem.
But, like I said at the outset, the later carbies probably have different
float construction.
Best regards,
Barry R.
Tasmania
At 09:24 AM 10/01/2005, Mike Shaddick wrote:
> >Hi all
> >
> >The carbys on my 1974 3500S are overflowing. I have had this problem before
> >and have had the carbys overhauled by a specialist. The return of symptoms
> >include a strong petrol smell as fuel spills out the overflow pipes during
> >running but especially at idle, traffic lights etc. Variable idle speed,
> >poor take off power from low revs but normal at high revs. I assume I have
> >contaminants in my fuel tank which are spoiling the sealing of the fuel
> float
> >seats in the carbys. I have fitted a new fuel filter but perhaps something
> >(water?) is getting past.
> >
> When cleaning out the floats and seats, it may be worth your while to
>check that the needles are firmly in place and have not dropped.
>
>Wink Martindale
>
>
>
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