Some of the Motorcraft 2150 carburetors have a plastic choke lever that at 1st glance may look like they cannot be replaced. This lever on the Motorcraft 2100 and early 2150 carburetors were simple to replace. The later 2150's take a bit more work, but can still be replaced.

Watch a video about replacing this lever on the 2100 carburetor. This video is for 1963 and later only. The lever on pre 1963 were different.

https://youtu.be/I7sSojKikeY

Fast Idle Cam Clearance Adjustment

This adjustment helps coordinate the throttle plate with the choke plate opening. This will allow a smoother, faster running engine during the cold engine period.

• This may not work on every 2100, 2 barrel carburetor, but should on most.
• Loosen the thermostat cap and turn the thermostat 90 degrees in the rich (closed) direction.
• Position the fast idle speed screw at the kickdown step of the fast idle cam.
• The kickdown step is identified by a 'V' stamped on the cam.
• The 351 engine makes use of a 2 piece fast idle lever to provide clearance between the idle lever and the intake manifold.
• The tang on the top lever will align with the 'V' mark on the cam.
• Check the clearance between the lower edge of the choke plate & the air horn wall. Specification may be different for each application. Refer to the instruction sheet included with the carburetor kit.
• To adjust, turn the fast idle cam adjusting screw.
  • Clockwise to increase the gap.
  • Counter clockwise to lessen the gap.
• Se the choke thermostat back to specification.
• Adjust the dashpot, idle speed and fuel mixture.