not a thing to be working with im a quailfied lawnmower mechanic 25 thuo mate but try a new ngk bpm6a or a bm6a spark plug first two stroke strimmers need good spark also it could be carburator not holding pressure plus dirt so i would advise you to take it to pro because you might do more damage than good not being awful then it would take more money to fix than what it would done
irish dave
September 2008