Pfaff 130 starting hard--where is kay the sewing machine maven?

Just got a Pfaff 130, a freebie! When I got it, the motor smoked almost as soon as I turned it on. I have oiled it according to the manual, taken apart the motor and cleaned it up, and the machine now seems to be running quite nicely except for one thing. I can't get it to start at anything but full speed. When I press on the foot pedal, it hums a bit as foot pedals sometimes do and then runs full bore as soon as the pedal is far enough down. After it's started, I can alter the speed as I wish but not for the first few seconds. Any advice? I've never used one of these before and don't quite know what to expect.