And what is lean and what is rich. How many valves does yours have. And what is the small little golden screw needle valve in the carb called?

When i turn the valve in all the way it dies, so im guessing im not giving it any air, which = lean which = it dies. Im guessing. If so, should i run it lean or rich, ive gotten it to do 3/4 throttle on 3 turns out with the glow plug on, but then it overheated and it was so hot that when i put water on it it was steaming.