Rebuilt Thermoquad issue -- It has to be primed before start each time

I usually prefer the brass also. But, if the other is what it wants! It sounds like the intake check isn't working quite right in the brass one. BTW are those the floats that came in that carb? What is the list # on the carb?

Oh both are brass, they are literally identical to look at! These floats came on the carb, whether or not that have been changed I don't know, I assume they haven't. They are the brass floats that are rectangular without a cut out slice/section, from what I understand you measure float hight from the middle of them, from the seam. The carb is a TQ9140S. I think that made it an early 70's if I recall.