There are a few things that I am not confident in trying to fix myself. Timing is one of those things. I personally would take it into a sewing machine repair shop for this one only because not only will the timing, if that is the problem, will be fixed but your machine will have a full once over. The nice thing about many vintage machines it that all the metal parts make it easier for repairs than many of the newer machine. I spent my best $65 for a tune up here recently on a vintage machine and it was the best spent money. I have another one I am getting ready to take in only because I want to make sure things are absolutely perfect. I fix the majority of my machines myself with ease. Not being familiar with this machine. I cannot advise. Maybe someone else here has the solution at hand so you can fix it at home.