welcome to the site
MY first question will be, you drained tank of old fuel and all new line to carb, and Then A CLEANED CARB, and still have running issue
if so, the above should have cleaned up fuel system
ethanol can be tuff to remove on parts soaking and carb cleaner tends to never get them clean, many use a carb rebuild kit to replace many parts to help ensure carb is good after cleaning, and ultra sonic cleaners normally do an excellent job, when given enough time to do so!
SO< next question is, is the air filter clean< are the rubber boots and things all GOOD and solid, not getting any air in thru them?
and next will be have you replaced the spark plug? time and sitting can make a plug get fouled up, and not get great spark, and make for funny running conditions!
so, let us know and we can maybe give you more idea's