Carburetor Rebuild


Inside the Autolite 2100

This is a view looking down the carburetor. The fuel bowl is fully
visible because I removed the float. I bought a carburetor rebuild
kit from a local Pepboys so I could replace all the wear and tear
parts like the accelerator pump and the economizer valve.
Removed Carburetor Parts

The economizer valve, accelerator pump, its return spring, its inlet
check valve, fuel float, needle, and the pump cover is shown in this
photo. The gaskets are for the economizer valve, which had developed
a small leak. The accelerator pump was OK, but it was stiff from wear.
The float and the needle were in very good condition.
Autolite 2100, the Other Side

This is what the intake manifold sees at full throttle. (My hand is
holding the throttle wide-open) This was a good time to make fine
adjustments to the lever throws and needles - no guesswork since the
rebuild kit came with a very thorough instruction sheet. Of course,
final adjustments were made after the carb was running on the car.

Click HERE for more info on Autolite 2100


Once installed, minor adjustments were made to the automatic choke, the transmission kickdown lever, and the accelerator pedal travel. The idle mixture needle setting in the instruction (at 1� turns) was too lean, as the engine would run for 3-5 seconds, become rough, and stop. Another 1 turn richer on each needle (one idle mixture needle per barrel) was required to keep the engine running smooth at the recommended 550 rpm. After checking the vacuum advance using a timing gun and a vacuum gauge, I took the car out for a test drive. The car felt better, with better throttle response overall, although it could have been psychological. I'm confident, though, that the car wasn't any worse.

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