I've been given a Ford 9N mainly because it won't run well. It will start if I hold the choke button out, but stalls when I increase the throttle or let go of the choke. There's a funny (sort of mourning dove-like) sound coming through the intake stack that grows louder as the engine speed increases until the tractor stalls. I really haven't had a chance to look it over well. It was dropped off Sunday and I need to pull it to a better location with a larger tractor. They guy who left it suspects bad fuel, but if that were the case I don't think it would start in the first place. Any ideas before I open the hood and begin randomly stumbling around?