Hey guys. I have been having some trouble with my stihl br600 blower the past couple days. Seems to start up okay in the half choke position, then, as anyone who has one knows, it automatically moves itself to "run". Well, i start it up, put it on, then am able to blow for maybe 30 secs to a minute before the thing cuts off. Then, repeat the process, starts fine everytime, just cuts off in run. Only seems to cut off when i have it on my back and am walking around. when i was running it on the ground, messing with it, seemed to run better. Maybe not getting fuel somehow? Don't know, the tank is full. Just wanted to see if i could get any input before i take it in. Thanks.