Why does the carb keep flooding?

Too late to use a cleaner, its time to take it apart and clean, adjust it all. might need a rebuild kit to replace needle valve and seat also.

Either the needle and seat are worn or the float is ruptured an sinks to the bottom of the bowl.
The needle and seat, along with the floats,are the only mechanical part that stops the fuel flow.

Need a cleaner like amsoil ,BG or an outboard product. Carb is bad cause of ethanol gas. It ruins parts. Cars were nevr made to use it

In the absence of something like a faulty or porous casting of the carb allowing fuel to bypass the float valves then sticking or leaky float valves, sticking or punctured floats or an excessive fuel line pressure must be the problem.

Where no isolating tap is fitted to a gravity feed system the float valves must be virtually perfect and the only way to ensure perfect seating is to examine the surfaces under a strong magnification and then verify correct seating by using a vacuum pump and gauge.

An excessive line pressure can be caused by a blocked fuel tank breather.