Re: your post on the Poulan with the kickback issue on pulling the starter rope. I have a Poulan P3314 with exactly these symptoms. Freely spins with plug removed. Kickback like a mule with the plug installed. I saw recommendations looking for oil in the crankcase, carbon in the exhaust ports, and frozen clutch/brake. None of those appear to be my issue. I did not see the final resolution in your posting..