Doug writes:

If you have to have a fuel pump, then usually you have two, so you have
a backup if one quits.

As for the mixture, that is very important and often used. Most systems
now have an EGT (exhaust gas temp) guage and you use that temperature
to set the mixture. There is also a procedure for setting the mixture
based on rpm. At altitudes above 3000' (some use 5000), the mixture is
set leaner than full rich on the ground before takeoff at runup.

How do I determine how much actual propulsive thrust I'm generating?
I see a throttle setting, manifold pressure, RPM, and pitch, but I'm
not sure how to set all this in order to increase or decrease total
thrust. I've been reading the FAA's handbook, but I'm still not very
clear on how it works. My _impression_ is that I advance throttles to
provide more power, and then set propeller pitch to the green range in
order to translate engine power into optimum thrust. Is that right?
But apparently manifold pressure is supposed to be telling me
something, too.

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