This is a 42cc Poulan Pro 4218, owner said "won't start, never ran very well either, piece of junk, wouldn't buy another". Wouldn't start because alcohol in the fuel had destroyed fuel lines, also check valve in carb was stuck open, even fuel cap was swollen and could hardly be removed. In addition there was scouring on the piston and cylinder and the condition of the plug and muffler indicated the saw had been running too lean. The big problem with these saws is they are purchased from box stores and have never been tested or set up to run right and the nominal carb settings from the factory are rarely correct and often way too lean. The saws are bought by people who know nothing about chainsaws and as long as they sort of work, they run them as they are until they self-destruct. This is how these saws get a bad reputation and it's a damn shame because these gold body Poulan Pros are actually a decent saw. A good design, high quality components and are easy to work on. Unlike the bottom of the Poulan line, these saws have a chrome plated bore and and when tuned properly, they give a long, trouble free life.