Note: This section applies to vehicles equipped with an automatic choke.
Open the hood and remove the air cleaner cover, which is secured with a wing nut and three clamps.
If you look at the carburetor from above in the middle of the air cleaner housing, you can see the flat carburetor air damper located at the top of the carburetor.
Ask an assistant to press the accelerator pedal; the carburetor air damper should close completely. Start the engine and watch her.
Warning! Do not lean close to the carburetor, as the engine may backfire, causing serious burns. When starting the engine, the air damper should open slightly.
Start the engine and let it idle. As it warms up to operating temperature, the choke should slowly open, allowing more air into the carburetor.
After a few minutes of engine operation, the air damper should open fully and take a vertical position.
With the engine off, inspect the choke shaft surfaces for any deposits that could cause the choke to stick. To clean the damper, use a special aerosol. Clean the damper shaft by turning the damper manually.
Apply aerosol lubricant to the contact surfaces of the rod and ensure that the valve moves freely.
The article is copied from the website: MazBook