1950 MM G what was the carb #

Both are too small for a 403. Have a U carb on a G. It doesn't run right. Am also looking for a G parts carb.
 
I agree the factory unit is TSX-68. Several other carbs will bolt to the manifold and are the same physical size. Difference is in the jet hole size and venture size. It is possible to "modify" others and get good results but usually requires a good bit of trial-and-error and experience in doing that. If you can use aftermarket; zenith has a 1-5/8" throttle bore unit that will work well. Otherwise; HAPPY DRILLING since the 68 is hard to find.
 

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