Why does the fuel float fail to rotate?

[Lopes]

The fuel float's inability to rotate is caused by aging of the float. Below is an introduction to fuel float-related information: 1. Fuel float: Also known as the fuel tank float in automobiles, it serves not only as a fuel level indicator but also as a sensing device for fuel level. This device, together with the fuel gauge, forms a fuel level detection system in vehicles. Therefore, it is integrated with the fuel pump. It floats entirely by buoyancy on the fuel surface, meaning the position of the float indicates the fuel level. Thus, by observing it, one can determine the fuel quantity in the tank. 2. Principle: The float stays afloat on the fuel surface by buoyancy, with its position indicating the liquid level. Knowing the liquid level height allows determining the fuel volume inside the tank based on the tank's shape.