if you turn trimmer upside down with the engine running, so that the spool is facing the sky, does the spool start to spin? I have this problem also and don't know how to fix it
Neil, July 2011
Did you fix your trimmer? Mine is doing the same thing. Just found your original question today, while researching my problem.
Annette, May 2007
The flexable shaft that runs down the to the spool do tend to break. They have a square on the ends that engage squares in the spool and engine. I'm not aware of any grass trimmers that have clutches. I've never seen on come into my shop anyway. There may be a gear head.