My el cheapo Weeedeater Featherlite grass trimmer appears to have a stuck automatic centrifugal clutch. When I pull the rope briskly at full or half choke, the engine does not cough or sputter as it normally does. Instead, the trimmer head rotates at the same rate of speed as the starter pulley. It is as if the head and the pulley are connected by a direct drive shaft. This leads me to believe that the centrifugal clutch is stuck and this puts a pre-starting load on the engine that prevents it from attaining enough speed to turn over and start. Is my diagnosis correct? How do I unstuck a sticking centrifugal clutch and is this a job for a homeowner? Any help would be appreciated. Thanks!