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Re: SU Carb adjust help

To: Bob Dallas <bobd@dynacomm.fse.com>
Subject: Re: SU Carb adjust help
From: "W. R. Gibbons" <gibbons@northpole.med.uvm.edu>
Date: Mon, 1 Jul 1996 17:25:04 -0400 (EDT)
On Mon, 1 Jul 1996, Bob Dallas wrote:

> Okay, I tried to follow the directions carefully and even had my warm beer
> to prove it, but I need help. These carbs are on a TD which hasn't been run
> in 25 years. I have cleaned them up and put in the Moss rebuild kits and the
> motor runs good but I think a lot rich.  I went about regulating the air
> flow first and I think got them pretty even.  Then, I started the mixture
> adjustment, un-screwing the nut one flat at a time(as instructed)--it seemed
> to not run as well, so went to starting place and tightened one flat at a
> time--the car seemed to run better--tightned more, car seemed to run
> better---it continued to run better up to ten flats and I stopped because I
> had only two flats to go--since I had started at them twelve flats or 1 1/2
> turns from the stop.  The car continued to run rich---I would raise the
> piston 1/16 of an inch and the motor would speed up and continue to run at
> that speed.  I need your advice.  
> 
> Does the tightning of the adjustment nut makes the carbs run leaner??? Could
> it be that these carbs need more than a rebuild kit--maybe new needles?
> Other Ideas?
> 
> Thanks in advance 
> Bob Dallas
> Houston, Texas
> '69 MGB-GT  '51 MG-TD

I experienced similar symptoms on my bugeye after the carbs were 
rebuilt.  When the choke knob was pushed in, the choke levers were not 
returning the jets to the correct position, so it ran rich whatever the 
adjustment.  

   Ray Gibbons  Dept. of Molecular Physiology & Biophysics
                Univ. of Vermont College of Medicine, Burlington, VT
                gibbons@northpole.med.uvm.edu  (802) 656-8910


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