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With that choke arrangement the inner stays still and the outer is
pushed up the inner as the dash control is pulled. That lifts the lever
on the interconnecting shaft which turns the cams on each carb to engage
fast idle and push the jets down.
To set the cable pull the dash control out about half an inch, slacken
the screw holding the inner, then pull the free end of the inner up
until the fast idle cams just touch the fast idle screws and tighten the
clamp screw.
Pulling the chock control further should them lower the jets, and
pushing it home should raise them.
This does need the clamps on the interconnecting shaft and the fast idle
screws to be adjusted correctly so both carbs do the same thing at the
same time in terms of enrichment and fast idle.
PaulH.
On 24/03/2026 01:31, dave northrup wrote:
>
> Disclaimer: 18GB-U-H 24109 engine in an MGA. That engine came with a
> weber; I put these carbs on.
>
> I am having trouble â?? when I pull the choke knob it does not change
> the choke mechanism. What am I doing wrong?
>
>
> _______________________________________________
>
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<p>With that choke arrangement the inner stays still and the outer
is pushed up the inner as the dash control is pulled. That lifts
the lever on the interconnecting shaft which turns the cams on
each carb to engage fast idle and push the jets down.</p>
<p>To set the cable pull the dash control out about half an inch,
slacken the screw holding the inner, then pull the free end of the
inner up until the fast idle cams just touch the fast idle screws
and tighten the clamp screw.</p>
<p>Pulling the chock control further should them lower the jets, and
pushing it home should raise them.</p>
<p>This does need the clamps on the interconnecting shaft and the
fast idle screws to be adjusted correctly so both carbs do the
same thing at the same time in terms of enrichment and fast idle.
<br>
</p>
<p>PaulH.<br>
</p>
<p>Â Â Â <br>
</p>
<div class="moz-cite-prefix">On 24/03/2026 01:31, dave northrup
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:aaf1377f8cc643f887751262dc0bbfb6@ranteer.com">
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<p class="MsoNormal"><span style="font-size:11.0pt">Disclaimer:Â
18GB-U-H 24109 engine in an MGA. That engine came with a
weber; I put these carbs on.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt"><o:p>Â </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I am having
trouble â?? when I pull the choke knob it does not change the
choke mechanism. What am I doing wrong?
<o:p></o:p></span></p>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre"
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