My buggy won't move, stuttering motor...

[othello]

The ESC could also be the culprit. Had the same thing with a Castle 1518 1800kv and a MMM ESC. I also thought the motor is toast, but as i switched to another ESC and the motor worked just fine i then hooked up another motor to the MMM ESC which showed the same stuttering well the only conclusion had to be that the MMM ESC went south.

I therefore would also recommend try another ESC with the Castle 1518 or hook up another motor to your MMPro.