Does it look "wet" down the carb? Pull a couple of plugs are they dry/ wet?
If wet, I would pull the fuel line and plug it to prevent more fuel. Clean, dry the plugs then see if you can get it to fire briefly, use a squirt down the throat of fuel if necessary. This will at least tell you it can fire.
If a float sinks, there will be fuel all over inside the carb, when cranking, it will percolate up through the bowl vents