rebuilt Thermoquad issues

Well, I'm back. Although I found out what was wrong with my carb earlier (accelerator pump was stuck), now I have different issue, probably caused by my rebuild this time.
I wanted to set proper idle/mixture and timing after rebuilt - timing is set at 8 deg according to label, but idle is getting stuck high after snapping throttle - 1k instead of 750.
If I restart engine - it runs 750 again until revving up - then stuck high again.
I'm almost sure it sucks fuel to get rich, but I wonder how...

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Author: bvberserk