How to Adjust a Ford Carburetor
There are several factors that would create a situation where you may need to adjust your Ford carburetor. Weather conditions such as extreme heat or extreme cold can alter the flow of fuel into the carburetor, causing the device to either get too much or not enough gas to work with. When this happens, it is necessary to alter the amount of fuel getting to the carburetor by turning the adjustment screws. Because of use and time, some of the components of the carburetor may begin to wear down, such as a float valve or seat pin, which would also require some adjustment to your carburetor. Adjusting the Ford carburetor can be done very quickly and have your engine back to running in top shape.
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Instructions
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1
Remove the air cleaner from the top of the Ford carburetor by unscrewing the wing nut at the top of the cleaner by hand and lifting the air cleaner off of the carburetor. Set the cleaner to the side and verify that the choke is closed when the engine is cold. If the choke does not close when it is cold, remove the spring housing on the choke with an open-end wrench, and adjust the choke until it is closed. Secure the spring housing.
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2
Start the engine and allow it to warm up. Observe the carburetor choke and pull-off rod to verify that the choke opens up when the car is warm. If the choke does not open, check to verify that the vacuum hose is attached and does not have any leaks. If the choke still does not work, replace the choke pull-off spring.
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3
Detach the vacuum line, and attach a tachometer to the vacuum port of your carburetor. At idle, the vehicle should be running at 800 RPMs. If it is not, turn the adjustment screw on the top at the throttle lever of the carburetor with a screwdriver until the RPMs reach 800.
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4
Adjust the fuel mixture screw at the bottom of the carburetor barrel by turning the screw with a screwdriver clockwise to increase the RPMs, and then slowly turn it counterclockwise to adjust the mixture until the RPMs reach 800.
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5
Remove the tachometer, and reattach the vacuum hose to the vacuum port of the carburetor. Set the air cleaner back on top of the carburetor, and secure the air cleaner with the wing nut. Turn the engine off and remove all tools.
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Tips & Warnings
Never attempt to work on an engine that is hot. Allow it to cool down before you do any work on the motor.
