Welcome to the Quilting Board!
Before you mess with the tension, use a different color of thread in the bobbin and the spool of thread and a new needle to see just how the tension is working on your machine. It might be OK. If not, watch Muv's videos and go from there.
I keep a small spool of thread, a bobbin of other thread (I can always transfer it to the one with the machine) a scrap of fabric, new machine needles, and a tiny pair of scissors in my purse, just in case... I come across a vintage machine I want to try out. I did that with the last Singer 99 I bought, much to the amusement of the clerks in the store. It let me know just what I was getting.
That little oil can with your machine is so cute, a real keeper!! ")
thank you for the tip. It apparently was in use until it became jammed with the knot of thread. I am hoping that it is still working and needs no adjustment. I can't test it now as we are packing to move and the place is in complete chaos!! Once we are settled, I'll take my time to clean it up and then try it out afterwards.
Yes, the oil can is so cute, I was so tickled by it actually that my son was a little embarassed about me fawning all over this little vintage oil can! I love embarrassing my son because the look on his face is just so funny. He's 17 but hey it's just a number and he will always be my little boy. Heaven forbids he reads this post!