I have for sale a carburetor specifically from a 3HP Throttle governed Fairbanks Morse Z engine. I believe it’s the same carburetor that some of the 6HP z engines use. Keep in mind this does is not the fuel pump style carb! Bolt hole spacing between the 2 holes is 3 1/4 on centers! Part numbers are a little tricky to read but I believe they say ZBA4A and ZCA4A. Throttle shaft moves freely. The gas line will need some work/replacing to the fuel inlet. See pictures for the absolute best description. Keep in mind this is a used item, it has wear and is almost 100 years old.