Jim,
Neither my 15-91 or my 202-2 will run at 1200 rpm / spm but they both run great.
Try cleaning the brushes and tubes with denatured alcohol. I had to do that when the brushes and commutator on my 201-2 got so dirty it wouldn't start unless you nudged the hand wheel. Works great now.
I agree with Steve, I'm jealous of the lathe.
Joe