Electric Assist Choke: Operation

Power is supplied to choke by 7 volt AC terminal (on alternator) when ignition is "ON". At 95±15°F., underhood air temperature, thermostatic switch closes, allowing current to activate ceramic heating element. Choke cover and ground strap complete current circuit. Heat is absorbed by a metal plate in the choke cover, thereby heating the choke bi-metal coil. This heating method allows faster choke operation. Choke thermostatic switch remains closed even after engine shut-down, until underhood temperature is 65°F. or less. Therefore heating element will immediately begin warming up when engine is restarted if underhood temperature is above 65°F.