You need a new motor. You have a Sta-Rite Dura-Glas pump. Can't tell what size horsepower you have without a little more info. Perhaps on the metal plate near where the pvc pipe comes out of the pump. A small decal about 1/2 in by 1 inch. it'll start with P2RA5 followed by a letter. Or on the motor itself, if any part of the decal is readable youre looking for HP or even a model # for the motor.

Take a close up of the labels and perhaps we can help a little further.