The saw I have is a Craftsman 2 stroke 18 inch bar. It was taken to a local shop and the owner was told it needed a carburetor , so he purchased the carb plus $175.00 later it still won't run.I believe they have the fuel lines in the wrong places. Also the return line didn't go directly to the fuel tank. they couldn't get it back correctly so they fixed it to a spray tube from a WD 40 can and stuck it in the tank. Any help would be appreiated