She fires up just fine and once warm runs great.
The problem I have is that when I push the pedal hard, it kind of chokes for a second and the whole thing smells like gas.
Classic sings of a mis-adjusted accelerator pump not giving enough pump 'Shot' of fuel when you take off.
Accelerator pump is located in the front of the float bowl, and has a rod from the throttle blade linkage to the pump arm.
Try moving the linkage rod in the adjustment holes a little and see if that helps/hurts things...
Could also be the accelerator pump has seen better days, and needs some new parts.
Last time I rebuilt a MC 2100 carb, it was under $20 for the kit,
And they are a SNAP to rebuild!
Get yourself several cans of carb/choke cleaner,
Some cans of Brake parts cleaner (evaporates cleaner than charb/choke cleaner),
A $20 rebuild kit, and a flat, clean work surface.
I'd also get myself a couple or three magnets, good for holding small parts from running off!
Locate a digital camera, and take LOTS of pictures of the linkage so you will know where it all goes back to,
And watch for things like check balls, ect. when you disassemble.
Expect to take about 3 hours for first time disassembly, cleaning, reinstall and tuning when finished.
This really is a SIMPLE carb to work with, and excellent choice for first time carb re-builder...