Dump the makeshift fuel tank setup for one. Seriously. Prime the side of the piston through the exhaust. If it doesn’t pop in 3-4 flicks, increase compression 1/4 turn. Flick it 3-4 more times. Prime the side of the piston again, and repeat. If it doesn’t start, either it isn’t primed enough, compression setting is too low, or it’s flooded.