I have a Weed Eater model GTI 19T that will not run longer than a few seconds. Any suggetions?

Hi,
My first place to start is to replace the inlet screen on the pump side of the carb. Their part #35178 (yes, I know there are numbers before that, but a good dealer will probably know what you are asking for - number and actual part) or Walbro part #140-70 or it is in the kit #K10-WAT (most common.)
Peace,
Clarke