Aftermarket Cap.
Find a place that sells elect. motor parts, and buy a start/run capacitor, 25uf, 370 volts. You will need to mount the capacitor under the lathe bed somewhere and insolate it too [not on the motor, as it will not fit there]. The original capacitor on the motor is no good, and if your on/off switch is also bad, and rapidly turns the motor on and off many cycles, quickly...your new Jet capacitor will be toast again too.