I just got this trimmer today from work , it will start almost all the time but when it does, the idle is very rough, it'll go up and down really fast. Please help thanks Chad

i just got this trimmer today from work , it will start almost all the time but when it does, the idle is very rough, it'll go up and down really fast. please help thanks Chad
Check to see if fuel lines in gas tank are intact or rotted off short or completely rotted off, I'm having that problem myself.

Clean carb and jets, install inline fuel filter just before carb.
Have clean tank, and good lines.