I bought a Mcculloch Eager Beaver 2.0 Cid Chainsaw from a pawnshop. The saw ran fine for a short while, but then stopped working. Subsequent attempts to restart are futile. The carb seems to be loading up & I notice excessive fuel at the exhaust. It also drowns the spark. I have taken apart & thoroughly cleaned the whole thing, then its starts again, runs for a minute or two & then stops accelerating & shuts off. If anybody knows how to correct this problem please let me know. My e-mail is colon2134@cs.com