Hi, sounds like a lack of fuel in the carb or to the carb. Could be plugged fuel line, bad fuel pump, float level set wrong, plugged main jets in carb, accelerator pump not working. First to check is the fuel pump output by removing the fuel line at the carb and turn the motor over with ign. off. Have someone with a container to catch the fuel. SAFTY NOTE: Do this outside with a fire extinguisher close by. If you are getting fuel to the carb it is a carb problem, if not, check fuel flow from tank to fuel pump, if good,fuel pump bad, if not, fuel outlet in tank plugged or fuel line from tank to fuel pump plugged.