Recently I replaced my 3/4 HP single speed motor with an AO Smith two speed 3/4HP motor on my Hayward Superpump. I noticed that the new motor was running hotter than I expected, after looking at the wet end closer, it is a 1HP wet end, with presumably, a 1HP impeller. The service factor on the motor is 1.5, so it should be fine turning a 1HP impeller, but what about energy usage? Would the pump draw significantly less electricity spinning the smaller impeller? Currently the pump draws 5.5amps at low speed, 11amps at high. The old 3/4hp pump drew 12.5 amps. The new pump model is a AO Smith/Century B793.