Help....

Hi, i'm new here so I don't excatly know where this should go. But anyways I just got my go cart today for very cheap but theres one problem. Once you have it started and warmed up and you give it gas it goes, but when you stop giving gas the enigne shuts off and I have to re-start it every time. What do you guys think the problem might be? I was thinking it was the oil...like old oil. It has gas and a good amount of oil. Nothing looks wrong with it......

Could be a huge multitude of problems. Could be bad carbs or bad jets in carbs, could be air intake problem, could just be bad idle. I'd try to adjust the idle first, then see where it goes from there.