Yep, either stuck or full of gas float, or your needle and seat is bad and/or have a piece of gunk stuck in it, not allowing it to shut off the fuel, therefore flooding the motor.
Careful with that. Many vehicles have burnt to the ground with that problem. All it takes is for one spark plug not get gas fouled, spark and chase all that raw fuel up the runner to the carb, and of course the gas just keeps coming.
BTW, Anyone know how to handle that when it happens? Run for the fire extinguisher right??? NO, ONLY AS A LAST RESORT !!! Jump in the cab, hold your gas pedal to the floor and crank the motor. DON'T PUMP IT. Just hold your foot to the floor allowing all the butterflies to open and dumping the fuel down the intake into the cylinders. By cranking the motor the vacuum is sucking the fire into the cylinders and taking the oxygen from on top of the carb. Without oxygen, you can't have fire. In a good situation, you have a buddy or someone smart enough or quick enough, while you're cranking or instructed someone else to jump and crank it and HOLD the pedal to the floor, grab a towel, t-shirt or big enough piece of cloth to tightly cover the top of the carb while they are cranking, but holding it tight enough that it doesn't get sucked into the carb and intake. Once you've got the cloth tight over the carb throat. The fire should be out and they can stop cranking. Done right, it works. Done wrong it can make a bigger mess because you can catch your cloth on fire too. Must be done in proper order.
