Choke Vacuum Break Thermal Vacuum Switch (CVB-TVS)

The CVB-TVS provides a richer choke operation when the air entering the carburetor is less than the specified temperature. The CVB-TVS controls the vacuum to the secondary vacuum break. When the engine is started and the air temperature is less than specified, the CVB-TVS closes and prevents the vacuum break from pulling, to provide a richer start and improved driveability. If the air temperature is greater than specified, both vacuum breaks pull the choke to its leanest position.