Check your in-tank pick-up filter. Perhaps you are getting foreign matter in the tank; tip the tank out for a look. If it's cr*ppy, it might be your fuel container has dirt in it, being carried thru as you pour the fuel into the tank. My recently bought trimmer had a hardened/cracked fuel line at the grommet into the tank. Perhaps some of the parts are not all as young/new as the rest.
Wayne de Loryn
March 2008
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix grass trimmers.