Fuel pumps are primarily cooled by being submerged in the fuel within the fuel tank.
According to the reference, the pump is normally submerged in fuel. This submersion serves a dual purpose: it cools and lubricates the fuel pump. The constant flow and presence of fuel around the pump help dissipate the heat generated by its operation.
However, the reference also notes a potential issue when the fuel level is low. When the fuel starts running low, the fuel pump may have to work harder to extract fuel from the bottom of the tank, and there isn't enough fuel surrounding it to provide the necessary cooling mechanism. This highlights the importance of maintaining adequate fuel levels for optimal pump performance and longevity.
