I thought fuel pumps were reserved for fuel injected planes in startups and during critical flight phases for all planes?
However. There are some X-Plane flight tutorials that tells us to use fuel pump in startup of C172 aircraft as if we are flying a fuel injected plane. I don't think its necessary for an gravity fed engine but why would someone use fuel pump in a high wing carburetor plane start up? Isn't it a waste of battery?