I installed an AC blower motor into a cabinet to act as a ventilator for some electronics. Thankfully it has a wiring label. Based on the label, it must be a run capacitor induction motor. It specifies a tiny 0.6 uF capacitor. I bought a cheap one off eBay.
This is the fan and a picture of the wiring label:
This motor has two blowers on the same shaft. They are a typical centrifugal style. I connected the run capacitor across the yellow and red wires. I connected the mains hot to the black wire. The neutral is connected to the blue wire. You can see the little capacitor in the picture as well.
Here is what happens when I power it up
It turns on and spins up very slowly. I think the slow spinup is normal. When the motor is running the RPM alternates very slightly between two distinct RPMs. Its noticeable because the pitch of the noise changes.
It doesn't start on its own, but if I bump the motor it will spinup and start running like case 1.
Do I have this motor wired correctly? Is the RPM "hunting" normal? Is it possible the motor is bad?