Choke Return System
While coolant is below 104-127°F (40-53°C), the thermal switch is energized and holds the choke knob in the on position. See Fig 1. The driver can manually control the choke setting. When engine coolant temperature nears 149°F (65°C), the thermal switch is turned off. Electrical current no longer flows to choke control magnet and the spring-loaded choke knob is returned to the off position.