The float retainer in the Motorcraft 2100 carburetor, also sometimes referred to as the float pin retainer, serves a straightforward yet essential purpose: it holds the float hinge pin in place. The float hinge pin is what the float pivots on within the carburetor's float bowl.

Here's a bit more about its function:

  1. Holding the Float Hinge Pin: The float inside the carburetor's float bowl moves up and down with the level of fuel. This movement controls the needle and seat mechanism, which in turn regulates the amount of fuel entering the float bowl. The float must pivot smoothly on its hinge pin for accurate fuel level control.

  2. Preventing Movement: Without the float retainer, the hinge pin could potentially move out of its proper position, which could interfere with the float's operation or even allow the float to become dislodged. A misaligned or dislodged float can result in fuel flooding or starvation, leading to engine running issues.

  3. Installation: When rebuilding or servicing the carburetor, it's crucial to ensure that the float retainer is properly positioned and in good condition. A damaged or missing retainer can lead to the aforementioned problems.

While it's a small component, the float retainer plays an essential role in maintaining the correct function of the carburetor's fuel control system. When working on or rebuilding a Motorcraft 2100, it's always a good idea to ensure that all components, big or small, are in their proper place and in good working condition.


Installing a float retainer on a Motorcraft 2 barrel 2100 or 2150 carburetor.

Float Retainer

2100 Float Retainer

Watch a video about installing this float retainer:

Installing a Float Retainer on the Motorcraft 2100, 2150
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