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<p>Kees,</p>
<p>Yes, the HD series carb's jet is attached to a diaphragm.<br>
</p>
<pre class="moz-signature" cols="72">Bob Haskell
Austin-Healey 3000 roadster registrar</pre>
<div class="moz-cite-prefix">On 5/7/23 08:22, Kees Oudesluijs via
Healeys wrote:<br>
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<p>SU and diaphragms???? <br>
</p>
<p>May be meant for Stromberg carbs? <br>
</p>
<p>The needle in SU's is not in contact with the jet so if the
carbs are set up properly the needles don't wear.</p>
<p>Kees Oudesluijs</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">Op 7-5-2023 om 10:57 schreef Simon
Lachlan via Healeys:<br>
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<p class="MsoNormal">I was a bit startled by something I read
the other day. It was to the effect that it’s sensible to
change the jets in HD carbs every 5 years because the
diaphragms harden and leak. Every 5 years?<o:p></o:p></p>
<p class="MsoNormal">Mine have been in since 2011…………I’ve 3,
so it’ll be quite a business.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Another topic…my copy of Roger’s book has
arrived. Excellent. Anyhow, the front cover…..where was that
taken?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Simon<o:p></o:p></p>
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