So, I know if you just have a hum and motor doesn't spin up, it is most likely the start capacitor. That is, if your motor isn't seized
My issue is a little different, I have the motor off the pump and on my bench to work on. My motor starts, it just starts slow. Like takes 1.5 -2 seconds to spool up. Kind of like, when you plug it in, you get whuu, whuu, WHUU, WHUU, WHUU, WEEEEEEEEEE(full speed). Could that be the start cap too?
I took the cap off, and my digital voltmeter reads capacitance. It read the correct MFD for the capacitor, does that mean its still good?