As a self-ordained even minor-er authority (I have rebuilt and run both the Carter and the B) on the Carter YF…
Carters have many more screws securing the air horn to the float bowl. I am not aware of leakage there being an issue. Certainly not for me and I don’t recall it ever coming up in a post here on the YF.
The power enrichment system is just a totally different animal. I kinda understand how the Carter works in that regard, but have never wrapped my mind around how the B is “supposed” to work. A higher authority would have to weigh in.
I will say that the ease of starting, smoothness of running, throttle response, etc. was SO much better when I made the switch. And I say that as a natural skeptic. I thought it would be a slight upgrade.
I have no idea how pristine was the condition of my B. Perhaps a pristine B runs just as well. I wasn’t willing to do the work to find out.
Last edited by JW51; 11/02/2023 2:28 PM.
