Try 2 things.
1st - Hold throttle to the floor, crank engine and see if it tries to kick at all, crank not more more than 20-25 seconds at a time, then wait about 1-2 minutes between attempt to start. Do not try more than 3 attempts at this. This is a clear/flood mode in case the engine was flooded.
2nd - if above does not work, buy a $3 can of starting fluid at the parts store. 2 second burst, count this out, not a quick burst, of it in the intake, try to start the engine. If the engine starts and dies, you have a fuel delivery problem, either a bad fuel pump, out of gas, a fuel pump relay or fuse.