I left my brother-in-law borrow my blower and he wasn't smart enough to start it. He decided to mess with the adjustment screws on the back and I can't get it back like it was. It was perfect before he messed with it. He said that he only messed with the big screw on the right. Can anyone tell me how many "turns out" from bottom that the screw normally is from factory, or even from a working unit for that matter. Thanks for the help. Homeowner Steve.