Motor problem - What do I do?

I have an older Meade Starfinder (pier mount, metal straps to hold OTA). I took the scope out 2 nights ago, flipped the switch on the DC motor and said, "Uh-oh." So, at the risk of gaining similar laughs as what I would receive from my auto mechanic...

It goes "Whizzzzz. Pause. Whizzzzz. Pause."

I have replaced the batteries and jiggled wires, but I cannot get it to run consistently. It does appear to turn the gear, but in a start and stop pattern.

The number on the motor reads RF 500TB 12560.
Am I looking at replacing this? Must it be replaced with the same motor
If so, what are my options, and where would I acquire it?
Recommendations?

Thanks,

Dave

If the part needs replaced, George Cushing of Astromart carries telescope parts. I got parts for my old C5 from him. John