[Mgs] dropping RPM's

[Paul Hunt]

Pulling the choke initially increase the idle revs (fast idle) which is why 
either doing that or opening the throttle prevents the stall.  However it 
probably *is* mixture that is wrong if it didn't do it with the HIFs.  You 
*could* have a vacuum leak, but if you had set the mixture correctly this 
would have 'tuned it out' at idle, albeit at the expense of an overly rich 
mixture when running.  Exactly what process did you go through to set up the 
carbs?  It isn't difficult but does require care and patience.  It consists 
of a number of steps, which must be done in the correct order, and completed 
correctly before moving on to the next.

PaulH.

----- Original Message ----- 
>I recently changed my carburetors on the 71 MGB from HIF4 to the HS4,