Hi, this is Russ,! I will give you the benefit of 28 years experience and teaching. This is a solid indication there is dirt in the carburetor and it will take removing the carburetor and disassembling it then soaking in carb cleaner overnight. You can TRY THIS: If you see a brass nut on the bottom of the carburetor, remove it and clean it well, there should be a small home in the brass nut, make certain it is clean if so equipped. If not the carb cleaning is needed. THANKS
The old filter restricted air flow and acted like a chjoke, the new one does not restrict the air....
I am not a mechanic. How involved is removing the carb?
As long as you draw a diagram of all parts removed and all linkage, you will be fine...it is not terribly bad to do.DRAW A DIAGRAM...I CANNOT SUGGEST THAT ENOUGH