A misfire will cause flames to come out of the carburettor
carburetor
timing might be off or the carb is loading up /too much fuel or has a faulty accelerator pump.
A bad, stuck or dirty float needle inside the carburetor.
bad seal in between your intke manifold and carburetor
your float is stuck in the carburetor. Clean it with carb cleaner.
Usually a stuck float mechanism.
The float could be stuck open in the carburetor, causing the leak. The carburetor leak needs to be fixed, this could be all of the problems, it also causes a fire hazard.
Timing is backwards turn distributor 180*
carburetor or spark plugs
The float valve in the carburetor is not working properly. You will need to remove the carburetor and clean it or replace it.
Float leval wrong are bad floats. Low fuel pressure, stoped up fuel filter. May not have gotten the carburetor clean enough. IT is running to lean.
The autonomic nervous system causes the SA node to fire