I don't know if this applies to Spitfires, but on the post-72 TR6, the
fuel tank had a collar placed in it to make it difficult to fill it past
a 10.5 gallon capacity, even though the tank was physically no different
that the previous years' 13.5 gallon tank. The reason for this was that
some component of the nascent emission system, possibly the charcoal
canister, had a vent which would be flooded by fuel from the tank
pouring back down the return line, and this, if I recall correctly,
would dump fuel into the carburetor, and on the ground, and everywhere
in between, if the tank were , in fact filled. ( Yes, of course, I did
this. )
Stuart Steele
> ----------
> From: r-james@tamu.edu[SMTP:r-james@tamu.edu]
> Reply To: r-james@tamu.edu
> Sent: Thursday, March 12, 1998 11:29 AM
> To: carbuff@scooter.net; triumphs@autox.team.net
> Subject: fuel leaks from stromberg carb
>
>
> Atwell:
>
>
> Regarding fuel leakage after shutdown from the Spitfire's
> ZS carb:
>
> I have EXACTLY the same problem, and it is at yet uncured. In
> fact, the other day enough fuel siphoned out on the floor, thru
> the carb, to make a puddle nearly as large as the car, plus at least
> a cup in the air cleaner. The tank was full, and a significant
> fraction
> of a full tank was gone.
>
> I have repaced the float valve (tried two different new ones, and two
> different
> used ones that seemed to be ok), set the float (more than a dozen
> times)
> checked the float for bouyancy (twice). I can't figure it out, but it
> must be a problem with the float valve. The only way I could make it
> stop
> is keep the float set very low (0.975 instead of 0.675 inch!). Then
> it ran
> too lean, though.
>
> I just bought a used Weber DGAV, which will rid me of the ZS from
> hell, this
> weekend I hope.
>
> Still, I would like to know why I couldn't fix a simple float valve,
> or was the
> problem something else. My fuel was coming out of the small port in
> the throat
> of the carb, not from a leaking carb body.
>
> Ray
> -------------------------------------
> Ray W. James, P.E., Ph.D.
> Texas Transportation Institute
> Civil Engineering Department
> Texas A&M University
> College Station, TX 77843
> Phone (409)845-7436; Fax (409)845-3410
> E-mail: r-james@tamu.edu
> Date: 3/12/98 Time: 5:29:17 PM
> -------------------------------------
>
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