This blower uses the throttle setting slid all the way to "stop" to kill the engine. However, after a couple years use the engine won't kill at that position and I just slide the choke over to kill it. I played with the cable to tighten it up some but couldn't get any change and didn't want to screw it up. Machine runs fine, but I'd like to get it back to where I can kill it with the proper switch. What's the solution? Never had this sort of thing happen before in 16 years.