Choke Vacuum Break Distributor Thermal Vacuum Switch

This switch is located in the air cleaner and permits the choke to run richer below the switching point, then to the leanest point above the switching point. The distributor vacuum advance receives full manifold vacuum below the switching point of the CVB-DTVS. When temperatures exceed the calibration value of the switch, manifold vacuum is directed to the thermostatic air cleaner and choke vacuum break ports while the port to the vacuum advance is blocked, preventing distributor advance above the switching point.