Steve Sirota

My 2003 Poulan Pro 260 18" 42cc won't idle. It will run wide open but when I let go of the throttle it shuts down. Need to use the chock lever to get it running. I recently replaced the spark plug, cleaned the air filter, tried 2 different cans of gas thinking it was a fuel issue. The fuel lines look good as does the priming bulb. It was running fine for a while that morning, then started acting up. Not sure what to do, any recomendations would be appreciate. Thanks