Hi, I have a Homelite Trimlite (weedeater). It has three choke levels A,B and C. I am supposed to put it on A, hold down the throttle, then pull the starter cord 3x. Then, I am supposed to put it on B, hold down the throttle, and keep pulling the starter cord till it starts. After a while, I am suppose to put it on C. The problem I am having is when I put it on B it dies after a short while and if I put it on C it dies right away. The Trimlite will start, then I'll switch it to B and hold down the throttle and it goes, but if I move the trimmer so the engine is closer to the ground than the front, it dies, so I keep the front part down and the engine higher, and it stays on longer, but then dies. Anyone have any suggestions on how I can fix this? It use to work fine but for some reason doesn't anymore.