My usually awesome tiltacut has now started giving me a problem, it starts and runs for a little bit sometimes longer than others then just cuts off, it doesn't seem to be running out of fuel ( revving up before turning off) it's more like an ignition prob. I've cleaned the mag and coil with sand paper, cleaned out the carb, had the muffler and carb off muffler is fine, looked in the ports and piston/rings are fine. Does anyone know exactly wot the condessor does just off the coil? Could it be that?