is the fuel going to the carb?? How was it last time you ran it? is the cord hard to pull? if it is hard to pull maybe its flooded, you need to take the plug out, pull the starter with the engine upside down a few pulls, put plug back in and try it again. If this is not the case either change the plug or prime the carb, take the airfilter off and put a couple of drops of fuel in it, also make sure that the carb has a little opening so it will pull in air and start.