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Discussion Forum

Replacement 3020 Carburator

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DJW

09-25-2002 21:37:40




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I am restoring a 3020 gas. The Marvel USX21 carburator is shot. The low speed air screw threads in the carb body are chewed up, and the pressed-in pin that adjusts the accelarator pump diaphram is loose. I need to get a new or rebuilt carb. My dilema is that I have had mixed info on what carb to buy, either a zenith or another Marvel S. I have talked with a veteran JD mechanic who swears by the Marvel S. He says Zeniths suck. I am veteran auto mechanic, and viewed a zenith at local JD shop. The Zenith to me looks like a better design, in my opinion. Can some one with experience in this situation answer the following questions:
What carb is better?
Should I buy new or rebuilt?
Does the Zenith replacement fall right in, or do you have to buy/fabricate crap for it to fit?
Who out here can one buy a quality rebuit carb from, that has better prices than the JD dealer?

When I mean rebuilt, I mean all parts are within new factoy specifications.

Thanks DJW

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mhmalcolm

09-26-2002 22:18:47




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 Re: Replacement 3020 Carburator in reply to DJW, 09-25-2002 21:37:40  
One of my customers has a gas 3020 that had the Marvel Schebler carb on it from new and always had trouble starting the engine and getting it to run right. He asked me to get him a new carb because he was sure that was the problem. I found a new Zenith carb at the Treadwell Carburetor Company, which I found over the internet, and got it for him. After he installed it, he called me immediately to let me know that the engine started and ran better than it ever had and did not have to make any modifications. He is so impressed that every time I talk to him he mentions how great the tractor starts and runs. Hope this helps.

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