I have an echo weedeater that won't run. I took the carb off and cleaned everything, and replaced the primer bulb that was wore out, new plug and burned all the carbon buildup out of the muffler. She fired up then, and it will run wide open as long as I leave the choke half open. When I put the choke lever in the running position it just dies out. I have two of these weedeaters, and this one is my backup...some backup huh? It hasn't run since early last spring, and I want to get it going.