In Reply to: Zenith Carberator posted by Larry Holbrook on May 02, 2019 at 16:13:49:
I found a Zenith application guide when researching the Holley on my '71 Ford 3000. I'll paste the two Ford Tractor pages below. Hopefully they will be printable/legible. Looks like the 13914 is the correct carb and this does not mention "A" or "B". If I remember right, the choke and governor linkage was different on the earlier 2000 3000 etc. so that may explain why those years have a different carb number. After seeing several references bashing the original Holley, I got stubborn and decided to stay with the original carb. After a good cleaning and kit the Holley looked good and seemed functional. I also reconnected the original vacuum connection to the distributor. Those often get disconnected by people who don't know how the system was supposed to work. I had zero trouble adjusting the Holley and it ran so well that tractor turned out to be much more than I needed or was comfortable trying to run a cutter on wooded trails. Any clean carb will run better than any dirty or botched rebuild, which is what most people are comparing when they make a switch.