I just bought one too and I am having probs with it. It came with oil in, I made sure i checked when it wasn't playing.
Keeps starting, running for about 1min then cutting out and not starting at all.
But it seems to have a phobia of race meetings. I tried it the first time I got it at a race meeting and it kept cutting out. got it home checked the oil, fired up first time and ran for about an hour. got to my second meeting and it fired up first time, then as I walked towards it with the extension it cut out and wouldn't start.
I got home cleaned the plug up and it fired up....then cut out after 1min, and won't start now.
Come back my trusty 12v!