[sickcraft]

I had the same identical problem. The carburetor float needle was not closing completely. I tried cleaning carb several times but it wasn't working. Replace the fuel line and the fuel filter, then take the carburetor off and remove the float and needle (there is only a little pin olding it on). Spray a lot of carb cleaner throw the fluel line and all other holes on the carb.

This solved it for me.