Take the sewing machine to an industrial sewing machine mechanic and have it gone over for worn parts and also to time the machine and set the tensions correctly. It will be the best $100 you ever spent.
If you got any old thread with the machine, throw it away and buy new thread. Why? because it would be silly to sew something together and have the thread fail because it was old and on the brink of failure. This is especially important if there are no labels on the thread cones to identify what the thread is.
No one lives forever, the trick is creating something that will.
Last edited by DanTwoLakes; 02-15-2012 at 12:24 PM.