Mike: I have all three on my SA is Carter, 130 is Zenith and 140 is Marvel-Schebler. I think I get the best performance from the Zenith. As for being troublesom, it's rather hard for me to compare them fairly. My 130 has probably 10 times the hours on it as the other two. It seems as though we have to install kits far more often now than we did 50 years ago, and that is true of all three. I tend to blame this on modern gasolines, however it could be age of those carb housings. I never installed a kit in my life until 15 years ago. During my farming days I was busy enough, it was call a service technician. Even in the past 15 years I've had professionals install kits. They don't do it a bit better than I do, or at least it doesn't work any better or longer. I have a friend with roughly 20 restored tractors, most of them gassers. He claims it's either shut gas of or be a continuous consumer of gasoline. I'm starting to agree with him, my SA currently leaks, just got 130 stopped leaking and just yesterday I noticed a stain on floor under 140. I asked the mechanic that works on my cars, thinking he'd have good experience as his dad has 25 tractors. He wouldn't touch it, said he didn't want to waste my money. He said, " If it didn't evaporate his dad would have his own gas well, in an area where there is no gas."
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