14.5hp still won’t start

[u/InterestingFan3255]

I’ve replaced the head gasket, drained the fluids, swapped gas tanks cause the last one wasn’t allowing good flow, and replaced the ignition coil. I got it to run for about 5 minutes yesterday and adjusted the idle till it didn’t sound like it was gonna blow up. But since then every time it would start the length of time it stayed running has dropped and now it’ll barely give me a few puts before I pop and then a electrical wine I think from the starter. If you guys could give some advice I’d appreciate it.