Marvel Schebler Carburetor
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This Marvel Schebuler Updraft Carburetor from Zenity Carburator Division is used on the Gray Marine engine as well as tractors and other industrial engines. It needs to be very carefully cleaned. Take all the jets out and don't expect the carb cleaner to work well otherwise. After my last rebuild, I am able to idle down to 500 RPM, something I had not previously been able to do for 20 years. Other than that, it is very straight forward. The document takes a minute to load so give it some time. It is 11 pages long. The picture on the left is my carburator.
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