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| Nope. Zenith are the cure. It was the Marvel-Shebler with the large vacuum operated accelerator pump diaphragm that no one can tune. Even JD service bulletins suggest swapping the MS for a Zenith and began that in the late 60s.
Zeniths for 3010 through 4020 are egg shaped. MS have a beveled bottom side with a bolt on cover on that angle.
Its sure that there were some Zeniths that were a problem, but not on 3010 through 4020. They are the simpler to tune carburetors compared to the MS for those tractors and look just like MS for some other tractors.
Gerald J. | |
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SORRY!! I meant a 3010 not a 2010.
