1984 G1 not running

[1984G1]

Here’s the story. My Cart was working fine, had been gettin a little weaker when going up hills and stuff lately but figured that was just from age. If it’s rose for say 4-5 minutes then it will not take off unless you give it a good push. Now here’s the big problem. I rode it to the house everything going fine, went inside, came back out put it in reverse and backed up 10-15ft and then it just stopped running. Switched to forward and still just turns over. Smells flooded so pretty sure it’s getting gas so I’m thinking it’s a spark issue. Replaced the plug already. Was thinking of trying a coil next. Anyone know of a cheaper alternative that will work on these? Other things to check and how to do so? Also any other suggestion/help with any of these issues are greatly appreciated!