You should be able to look down the carb, work the throttle and see the accelerator pumping gas down the carb. If not you either need more gas , the accelerator pump needs rebuilding or you have a bad check valve in the fuel pump and you lost the fuel from the tank to the pump. If you can't see it pumping in the carb when you work the throttle, Pour half a cup of gas in the carb, hold the pedal to the floor and crank it. If it is flooded..hold the pedal to the floor and crank it.