[Healeys] HD6 Mixture.

[Mark Donaldson]

Simon,  

 

I had this problem with my tri-carb.

It foxed me for years as the springs were both the same length - but they
WERE NOT the same strength.  

The rear carb spring was too weak, so the back carb ran lean.  This also
caused an overheating problem in certain circumstances..

 

Check it out.  You may also find that the colour painted on the spring has
long gone.  All three on mine had since faded since 1962.

 

Mark

Ardmore 

New Zealand

 



 

  _____  

From: simon.lachlan at alexarevel.plus.com
[mailto:simon.lachlan at alexarevel.plus.com] 
Sent: Sunday, 27 January 2019 8:59 a.m.
To: Healeys
Subject: [Healeys] HD6 Mixture.

 

See attached which is what I was working off and which some may find useful
for future reference.

 

My car is a BT7 but it has 3 HD6s. All linked together and all seemingly
running +/- in concert. All per the procedure outlined in the attached.

When I tried testing the mixture with the so-called "lifting pin" on two of
the carbs, all went well and I had results that I could work with. HOWEVER,
on the third, lifting that pin stops the engine dead in its tracks. Very
strange.

Any ideas?

Thanks,

Simon

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