Diagnosing dry plug, barely idling cart

[Carlspeed]

Night before last it was running well, 23mph or so with people on it. Late 90's Marathon with an old Vegas Carts kit motor. Next day it drove around the block, but had a tough time idling, and wouldn't go past 17mph. Go home, go out again and it won't idle. Started, but super bad idle, and stalling upon accelerator pedal. I figured some of the bad fuel had stuff that made it past the filter, and I cleaned the carb. Didn't help, but I did notice that a gasket was bad. I used the intake gasket and put it between the fuel pump plate and the carb. No gasket on intake side to air filter. Cart didn't run any different. I checked the fuel pump, and it was putting fuel into the fuel bowl. I checked the spark plug, and it was dry. What is the next step? Just ordering a new carb to start? Thanks guys.