Hesitation when accelerating from stop - Holly 1901 carb

[Merc Cruzer]

The car (1953 Mercury) is an automatic - Merc-O-Matic. The car is stock, with no mods. Nothing has been changed except the setting of the float to the correct level.

In my prior post I had an issue with setting the float, of this same carb. That has now been corrected. Thank you all once again for your posts.

Now there is a new issue. When I accelerate, from a stop, the car hesitates. I have replaced the minimizer/power valve diaphragm/valve and the accelerator pump piston seal, with new ones. When the car ran rich I did not have this issue.

There is no hesitation, when accelerating at speed.

Looking for suggestions to correct the issue.

Thanks you,

Merc Cruzer