This is my first request for help and am confident that this the best place to get answers for my questions. My niece has acquired my grandmother's 1938 featherweight. The machine has been idle for a very long time but is free of rust and will run quietly for a few minutes. Then the motor starts to smoke. The local sewing macing repair shop will replace the motor with a generic but has no interest it trying to find out if the motor can be repaired or even cleaned. What does the smoking motor indicate? Is it dirty? I am not how to proceed with getting this operational. My niece and I are thinking we might take this on.
Thanks for any advice.