Ahhh......it is indeed not enough! As I adjust the inductor (ie variac) the voltage continuously drops! NO resonant rise. I thought 4uF was enough? the motor is .3A at 7.5W....other's have had sucess.....
Also I don't think you mentioned whether you're using the run cap that is supposed to be used with the oriental motor. If this is not used, then everything will be different. A larger phase cap will be needed, and you may not develop enough torque in general. The oriental motor calls for a 2uF phase cap I think. I mentioned the actual value in a previous posting.