[Mgs] SU HS4 Lifting pin?

menno.meijer at i-shirt.nl menno.meijer at i-shirt.nl
Thu Aug 9 06:18:02 MDT 2007


Gentlemen,

I'm trying to set the mixture of my SU carburettors correctly. The documentation
I have describes, in my words, the following behaviour:

- Press the lifing pin
- The following behaviour could be observed
  - RPM drops / engine stalls. (Too weak)
  - RPM increases and stays increased. (Too rich)
  - RPM increases shortly and then drops just above the level it had prior to
pressing the lifting pin. (Mixture correct)

Now my question: Do I have to press the lifting pin shortly then release it and
wait for the described behaviour? or is the described behaviour noticable for
the duration that I lift the lifting pin?

Thanks in advance,

Menno
'63 MGB


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