Have you checked your plugs? Bad power valve would cause a rich condition. What kinda carb? Is it a vacume secondary or mechanical? If its vacume, what spring do you have in it. Not the safest thing to do, but look down the carb as you push on the accellerator to see how much fuel is coming out of you squirter nozzle(s). If theres none you could have a ruptured accelerator pump or cloged nozzle? Could also be you accellererator pump cam?