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The choke cable lever and fast idle cams aren't moving far enough.Â
Barely half of the cam is passing the fast idle screw whereas virtually
the whole of the arc should, and it's not moving the jet lever down at all.
You probably need to move the inner down through its trunnion clamp to
get more movement of the lever. How far can you pull the dash control?Â
Mine is a good 1 3/8".
You may need to alter the position of the choke lever on the shaft.Â
When you have full travel pull it half-way and it should make a
right-angle with the line of the cable. If it's too low it can make the
start of the pull hard and if it's too high you may not get enough travel.
See here https://www.mgb-stuff.org.uk/choke.htm#adjust2 for pictures of
the lever at zero and max choke, and of the fast idle cam and jet lever
with no choke, just at the start of enrichment, and full enrichment.
PaulH.
On 25/03/2026 01:09, dave northrup wrote:
>
> Check out this video: https://youtube.com/shorts/qw1SC_rSEdQ?feature=share
>
> Wife pulled out the choke while I was filming. So the choke cable is
> not the problem
>
> Clearly itâ??s the next step in the choke process. What should I be
> adjusting now?
>
> Thanks so much!!!
>
> 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?
>
>
> _______________________________________________
>
> Mgs@autox.team.net
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<p>The choke cable lever and fast idle cams aren't moving far
enough. Barely half of the cam is passing the fast idle screw
whereas virtually the whole of the arc should, and it's not moving
the jet lever down at all.</p>
<p>You probably need to move the inner down through its trunnion
clamp to get more movement of the lever. How far can you pull the
dash control? Mine is a good 1 3/8".</p>
<p>You may need to alter the position of the choke lever on the
shaft. When you have full travel pull it half-way and it should
make a right-angle with the line of the cable. If it's too low it
can make the start of the pull hard and if it's too high you may
not get enough travel.</p>
<p>See here <a class="moz-txt-link-freetext"
href="https://www.mgb-stuff.org.uk/choke.htm#adjust2";>https://www.mgb-stuff.org.uk/choke.htm#adjust2</a>
for
pictures of the lever at zero and max choke, and of the fast idle
cam and jet lever with no choke, just at the start of enrichment,
and full enrichment.</p>
<p>PaulH.<br>
</p>
On 25/03/2026 01:09, dave northrup wrote:<br>
<blockquote type="cite"
cite="mid:47922f4a069d452a91784b6d439f0a52@ranteer.com">
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<p class="MsoNormal"><span style="font-size:11.0pt">Check out
this video:Â <a
href="https://youtube.com/shorts/qw1SC_rSEdQ?feature=share";
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">
https://youtube.com/shorts/qw1SC_rSEdQ?feature=share</a><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">Wife pulled
out the choke while I was filming. So the choke cable is
not the problem<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">Clearly itâ??s
the next step in the choke process. What should I be
adjusting now?<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">Thanks so
much!!!<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"><o:p>Â </o:p></span></p>
<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>
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