I picked up a free LB 10304- sorted out most of the problems. I found I like mowing with it due to it being so lightweight and me recovering from a shattered wrist. So, here are my questions: #1- Left drive wheel stopped pulling. Dealer said it was likely a small plastic disk and a small rubber friction disk. Cheap parts, I replaced them. Worked for a bit, now wont pull again. Right wheel pulls fine. that little trip dog that engages the sprocket seems fine too. I also checked the sprockets, and they look fine, not slipping. #2- someone else repaired the carb while my arm was in a cast. High speed is fine, but low speed is still pretty high- not a normal idle. How do I get "idle" to be slower? I am using Echo synthetic 2 cycle oil since I have an Echo trimmer. One small bottle to a gallon of regular gas. My dealer says it is the best two cycle oil he carries. I not it doesn't smoke, and hardly smells, but then again, this is an "under the deck" exhaust.