Full fuel level in M20S Eagle

[mooneyflyer]

The full fuel is 75gals, but where is the mark for 75 gals?

[Niko182]

bottom of the tab

[Mufflerbearing]

Like @Niko182 said, it is the bottom of the filler neck.  If you turn your plane into a screaming eagle, those filler necks can be removed or forgotten plus a higher UL and higher HP.