I have a Husqvarna 150BT Backpack blower. Has run perfectly until yesterday. It just quit while in use, as if it was turned off. No faltering, as if running out of gas or starving for air, etc. I pulled the plug and it is ok. I took apart the handle and checked the kill switch and it is operating correctly (also the throttle cable is working correctly). Didn't want to tear it down any farther until I researched more. Any ideas?