Delta Radial arm saw 33-990 tripping circuit...

Question

Hello

I have had this saw for 8 years with no problem. It is on a dedicated 15 amp breaker. It has just started to trip the house breaker after about 1 minute of running. You do not even need to be cutting anything. Just running the motor for 1 minute or less will trip the breaker in the house. I am not sure if it is the motor or possibly a capacitor. A new motor is $680 dollare while a capacitor is $80. A whole new machine is $780.