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Thanks for all that!  Metering lever is now readjusted, that was just a test to see if if helped things.


1. Pop-off pressure: Didn't know about this!  It's about 15 psi.  It seems like it's slowly closing by around 8-9 psi.


2. Mixture: I've been working with both needles at 1.25 turns out.  I've played with the L screw, but no reasonable setting lowers the idle appreciably. 


3. Throttle return: I'm working with the cover off and the linkages removed.  I feel reasonable tension on the throttle return spring, and if I hold the carb up I don't see any light through the throat (except for the little half-moon at the bottom).


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