Why is the fuel not getting to the carb?

 

Depending on what model you have(which would help a little more to know) fuel not getting to the carb could be from a stopped up or weak fuel pump,leaking fuel pump vacuum line,stopped up inline gas filter,possible faulty fuel valve,even a needle and seat in the carb itself (if gas has been sitting for any length of time that hasn't been treated with a stabilizer) can gum up the float needle not allowing fuel into the carb bowl.