CC139 Choke Coil (Thermostat)
Made in USA. Can be used to replace hot air choke coils in most Rochester M4MC and M2MC carburetors.
How to replace your hot air choke
Rochester Quadrajets and Dualjets came with several choke systems. Starting in 1975, most GM cars and some trucks used a hot air choke coil mounted on the passenger side of the carburetor.
The CC139 electric choke replaces the hot air choke exactly. Don't use a gasket, because the choke is grounded through the carburetor.
The CC139 choke has a notch which is aligned with the front screw on the choke housing on the carburetor. This is a preliminary adjustment, but is usually pretty good for most applications.
Power
The CC139 is an OEM design which contains two heater elements (high and low) and a thermal switch. No external sensors are required.
To wire the CC139 electric choke, connect it to power that is switched with the ignition or that is 'ON' when the engine is running. This can be the wiper motor feed, or direct from the alternator brown wire - use a fuse for safety.
If you have any questions, email us at doc@carburetor.ca