Take an air compressor blow gun attachment and blow from fuel line to fuel pump back into fuel tank with fuel cap removed. Make sure it is clear and then reattach fuel line to pump. Crank engine and look for strong, steady pulses of fuel out of fuel pump (remove fuel line from pump to carburetor). If all checks out, you know you have fuel getting to carburetor. If it doesn’t start and you have spark, chances are the carburetor needs to be cleaned.You may have caused an air trapped pocket in gas line.. I'd suggest removing the exit line & test for gas flow ..