re: WeedEater won't run. Any ideas?

Buy yourself some lacquer thinner from the paint section of your local hardware store. Empty the gas tank. Pump the gas out of the primer bulb. Empty that gas too. Pour in about a cupful of lacquer thinner. Prime and let it sit for about 5 minutes. Prime again and start the trimmer. Only let it run for a few seconds. Empty the tank, put in gas and go about your trimming. Only if this does not work should you consider touching any tools or replacing any parts.