Carburetor question.

[I MOW ALONE]

if you have both carbs and they are same body try the swap and see how it runs. if it runs rich or lean just swap main jets

[pugs]

One may be internal vent while the other is external vent. Might have issues if you try to use the internal vent where the external was as there are no passages in the gaskets/air filter housing for the vent to go.