My kenmore washing machine will not run. It fills with water then cannot start. It will sometimes start if I remove all of the clothes and most of the water. I hear a hum like the motor is trying to start for a few seconds then it stops. I do smell a slight burning. The drive coupler is intact. I suspect the motor is worn out, Or could it be the start capacitor that is failing. Motor is $80.00, start cap is $4.00.