Electric Assist Choke Servicing & Testing

The electric assist choke system is not adjustable, however, the choke linkage and shaft must move freely hot or cold. Carefully inspect choke rods for bending, as a bent rod will not operate properly. When installing carburetor, use caution to prevent entrapment of the choke rod. If the rod becomes trapped, release it by carburetor removal, rather than using force.

CHOKE CONTROL SWITCH TEST

1. On dual stage control switch, connect a test light to battery terminals. Note intensity of test light.
2. Before starting the engine, disconnect ignition harness electrical connector from control switch.
3. Connect a test light to load (choke) terminal of control switch and ground.
4. Start engine and allow it to reach normal operating temperature.
5. Apply 12 volts to ignition harness terminal of control switch. If test light does not light or does not have the same intensity as when checked in step 1, replace control switch.

CHOKE HEATING ELEMENT TEST

1. Disconnect electric heating element at the control switch.
2. Connect an ohmmeter lead to the crimped junction of this wire at the choke end. Do not connect to the steel heater casing.
3. Hold the other ohmmeter lead against the choke housing or engine manifold.
4. Electrical resistance of 4-12 ohms is normal. Meter readings indicating an open or a short, replace choke assembly. The electrical assist choke system does not change any carburetor service procedures and cannot be adjusted. However, the choke linkage and shaft must move freely hot or cold.
5. If the system is found out of calibration, a new heater control switch or choke unit must be installed.