Electric Assist Choke: Operation

Current is constantly supplied to the temperature sensing switch. The system is grounded through a ground strap connected to the carburetor body. At temperatures below about 54°F, the switch is open and no current is supplied to the ceramic heater located within the thermostatic spring, allowing normal choking action to occur. At temperatures from 54-74°F, depending on engine requirements, switch will remain open or will close to supply current to the ceramic heater. The switch will always be closed at temperatures above 74°F. As the heater warms, it causes the thermostatic spring to pull the choke plate open with in 1 to 1.5 minutes.