I replaced the carbuerator, spark plug, fuel lines, and carbuerator gaskets where it mounts to the engine. This thing refuses to run correctly every single one of these weedeaters I get that somebody wants me to fix for them never run right. But this one is by far the worst. I have to have the air/fuel high and low screws all of the way down for it to barely run and when it's cold it revs all of the way up then when it gets hot it starts bogging and stalling at idle and revved up and it keeps sputtering almost like a misfire. And no matter how I position the choke it never makes a difference either. And if I try to move the carbuerator adjustment screws at all it refuses to even start at all.