I got a briggs motor somewhere between 5 and 6 hp. When I put a little gas in the carburater it sucks it in and then will start after a few pulls for about 30 seconds but when it runs out of the gas I pour in it dies then won't star. IF I give it half to full throtle it revs but it won't idle by itself or stay running any help thanks.

Could be a bad diaphram, a stopped up pickup tube in the fuel tank, or water in the fuel. I can't see which carb set up you have, so I am just trying to hit on something to help you here.