Originally Posted by tallchick

I have a F-600 and I don't believe that any of these models require oiling, perhaps you can contact the shop where you purchased it?? It's a lovely machine and I will upgrade if mine dies, but so far she has been a workhorse with no issues!! I'm sorry your having problems, perhaps try a few different bobbins, some different threads and make sure your bobbin case is inserted correctly........hope you get your issue resolved soon!!