We did a pretty thorough check of the floats. They do a good job of stopping fuel flow when they are installed upside down, they rattle when you shake it when installed properly. We tried adjusting the center tab on the pivoting arms to have them shut off the fuel earlier. With the motor running, fuel pouring out of the indicated port, we took the carb off, bowl off the bottom w/o tipping it. Fuel level was about half way up the bowl, we were expecting that if the float is not shutting off the flow properly the bowl would be super full.
We did not check the emulsion tube, don’t know what you’re describing. All we did was unscrew the two jets, we did not take anything else out.