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Massey Harris & Massey Ferguson Tractors Discussion Forum

Marvel Carb- Which way is up?

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Part Time Farme

08-31-2004 08:41:57

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Rebuilding a Mavel Carb on a 1958 MF50. The venturi or funnel will fit in so it is flush with the upper casting or sticking out. Which way is correct?

PTF

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Alberta Mike

08-31-2004 15:07:11

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Re: Marvel Carb- Which way is up? in reply to Part Time Farmer, 08-31-2004 08:41:57

With a set of calipers, measure the diameter of the venturi casting (or brass trumpet) at both ends. I think one end will be slightly smaller. Then measure the upper and lower carb castings (that the venturi ends fit into). I think you should be able to find the match as to which is up and which is down.

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Part Time Farmer

09-01-2004 05:12:06

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Re: Marvel Carb- Which way is up? in reply to Alberta Mike, 08-31-2004 15:07:11

Thanks for the suggestion. I found a blow up diagram showing the larger trumpet end up. This allows the lower end to stick out and mate with the lower casting. The gasket needed to be trimmed so the whole thing would go together.

PTF

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