did you turn the key? :
is the motor turning over at all? if not... check your battery first and all wires running to it. i have had bad corrosion on mine after being left for a short period of time and the wires wouldnt make a good connection even though they look hooked up
if the motor is turning over, you need to start at the gas tank, check to make sure your line connection is tight, follow your fuel line down to make sure there isnt any dry rot or kinks in the line. prime your bulb, and then pull your choke out and try to get the motor turned over. may want to change your inline fuel filter too just as a precautionary. Also, check your spark plug caps to make sure they are both on tight, and they didnt get pulled loose by something. if it still wont fire, you may want to try fresh gas and pull your carb, clean with carb cleaner, then retry. good luck!