Your genny has more than enough "umph" for the well pump, but you kinda got skrued with a 30A 240 outlet. A genny that size should have a 50A outlet. Instead of the winding being tapped for a 50A circuit, I'm guessing it is two 110V 15Amp circuits combined. Which means the 30A circuit is shared with the 15A circuits.
Look at it this way. Your genny has the potential to push 83 "peak" Amps. Your well pump demands 24A on startup (that still seems kinda high for a 3/4 HP motor.). If every appliance kicked on at the same time, there would still be 59A available to them after the pump gobbles up what it needs to start.
Of the half dozen3/4 Hp 220V motors I checked the specs on, they generally require about 5 to 5.5 Full Load Amps (FLA).
So, if a 230V 1 HP motor is rated at 7 FLA and 21 startup amps max. Then a 3/4 HP should demand 5.25 Amps at full running load and just under 16 Amps, or, about 3,500 surge watts on startup.
Something else I noticed is that most 208/230V motors run on 50Hz instead of the 60Hz we are familiar with. If the motor is set up for 50Hz, it can still be used on a 60Hz supply. However, two things are going to happen. 1) it will run 20% faster and 2) it will run less efficiently, drawing more current than is needed and will convert electrons to heat instead of work.
I dunno man. Something isn't adding up here.