I just had this with a Husqvarna trimmer. It has a spring in the start pulley that was slipping out of it's hole, and it chewed up the pulley. I had to replace the spring(it broke) and the pulley. I pulled up a couple parts diagrams, but they have no details on the starter. Parts tree shows starter as unavailable, though there are multiple versions of the BL110, with more model info it may be findable. Hopefully someone who knows this machine will speak up.
