Hi, poppa530 I will try to help you out. You probably installed the chain so it is not engaging the sprocket. Remove the chain and re-install, but make sure it is engaged on the sprocket located behind the drum where the shoes are that as the RPM goes up engage the drum and turn the chain. I can't think of anything else that could be causing this problem, unless the drum and clutch shoes are not engaging any more. Do you know if the clutch shoes, drum and sprocket have been removed from the crankshaft, and maybe not re-installed properly? Can you turn the chain by hand? If not, something has jammed preventing chain from turning. Have you recently installed a new chain, bar or both? If so, you might not have the right width drive link tang or the right pitch on the chain. If a new bar has been installed the bar groove might not be the right size. You might also check out the sprocket to see if it is bent or damaged. I hope I have helped even a little bit. All the best and good luck. Any questions welcome.
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