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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum

New Zenith carbs To replace USX

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Author  [Modern View]

07-31-2020 10:11:17

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Has anyone tried those new Zenith carbs that this site carries in place of the Marvel schebler USX on a 1750-1850/55? Not sure if they are overseas knockoffs or what. Pricey at $600 plus. I have had troubles with the USX aluminum one on there now. I know the JD guys say the zenith is a much better carb on the 3020 and 4020s. I believe when the 1855 came around the factory went with the cast iron zenith.

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08-01-2020 16:30:33

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 Re: New Zenith carbs To replace USX in reply to dep, 07-31-2020 10:11:17  
thing is...it's almost as old school as pouring gas into the combustion chamber manually... just find what works, you won't find anything epic. Just be happy it runs without bogging down. Like an old mule, it just doesn't get any better.

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07-31-2020 10:22:12

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 Re: New Zenith carbs To replace USX in reply to dep, 07-31-2020 10:11:17  
Information that I have gathered recently for the Zenith carburetors is that they are built to Zenith specifications. It seems as though someone bought the specs for the carburetors and is having them made according to that. Id say that they are a Zenith, but they arent. I recently also spoke with someone from Roberts Carburetors in Spencer IA about the very same conversion you are asking about. Id suggest giving them a call. He seemed very knowledgeable about both the Marvel Schebler and the Zenith Carbs. However, they are even more expensive

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08-01-2020 10:21:56

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 Re: New Zenith carbs To replace USX in reply to KFFarm, 07-31-2020 10:22:12  
I did call Roberts carb and talk with a woman there that was very knowledgeable. I forgot to ask if they sell the universal style that out there now. She told me the 4020 carb has a different throttle linkage, Venturi and jetting. She said they could not build me one as they didnít have those parts. She recommended that I try and find an original Zenith off an Oliver...

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08-01-2020 12:56:00

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 Re: New Zenith carbs To replace USX in reply to dep, 08-01-2020 10:21:56  
Have you checked out this?

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07-31-2020 13:26:39

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 Re: New Zenith carbs To replace USX in reply to KFFarm, 07-31-2020 10:22:12  
I bought one a year ago for an 1850 at the farm. Tractor would even fire at all. It had a restriction internally. Bought a kit for the USX and the tractor is happy.

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