I recently had to replace the carburetor on my push lawn mower and thought it would be fun to CAD it and print out a replica. The carburetor was modeled in Fusion 360 completely from scratch and has all the components of a functioning carburetor. (In theory is should work if you need a replacement carburetor but it is not recommended lol.)
Hope you like it and let me know if you have any suggestions for future models!
I'd recommend rotating it upside-down in your slicer and printing it that way so the supports are easier to remove (I printed it right side up and it was a pain to take the supports out).