After replacing the broken exhaust and cracked spark plug, it ran beautifully...until yesterday.

I pulled the evap system which has been known to cause stalling in the heat. I followed a YouTube tutorial, and it appears everything is installed correctly, including the new fuel line.

I filled it with gas, but it won’t start. I can see fuel flowing to the carb, and it sounds like it wants to start, but no boom. I am currently charging the battery, which could have run down through these last couple of days, but I can’t figure this out.