I hope somebody can solve this problem. Started my machine a few days ago and whenever i give it any throttle it backfires through the carb HARD. Experience tells me a lean issue. Disassembled and cleaned the carb, checked the rubber carb mount for cracks, reassembled, no difference. Starts and idles beautiful. Raised the float slightly, no difference. Theres plenty of fuel in bowl. Replaced spark plug, no water in hole where it screws in. Valve lash is perfect. Took carb from another machine and Put it in, no difference. I'm out of ideas.