Hey everyone just recently bought a go kart with a briggs and stratton 5 hp fun power motor.. it started and rode for a while then it would shut off after pressing the gas i left it for a while then it wouldnt turn on at all. so I did a carb cleaning and rebuild.... Also cleaned out the gas tank and drained out the oil.. it works now but if the gas is pressed half way it will turn off... but if I eaze on the gas slowly going faster it will work fine? Does it need a new carburetor? Any suggestions?