The electric heater RELEASES the choke, and voltage should only be supplied to it while the engine is running. I use an oil pressure sensing switch to accomplish that chore. If the engine happens to stall during warmup, the choke stops being heated until the engine is restarted.
Adjust the choke cover to just barely close the flap valve at room temperature, and adjust the fast idle screw to open the throttle a little and increase RPM once the engine fires. Cold start procedure: Tap the gas pedal ONCE to allow the choke to close, and crank the engine until the engine starts WITHOUT TOUCHING THE GAS PEDAL. The engine will get the proper amount of choke and assume the proper warmup speed with no input from the driver. You can adjust the fast idle speed if necessary to avoid stalling or over-revving once the cold engine starts. Once it's warmed up, tap the throttle ONCE to allow the engine to assume the correct hot curb idle. A properly set up and adjusted automatic choke is idiot-proof when it's used properly. During normal hot engine running, the choke flap should be completely vertical and provide NO restriction. If the engine stalls with the choke fully open, raise the idle speed with the adjusting screw at the base of the carburetor.
Jerry
