Dogwatch

Hey All, :I was poking around in the back of my folks sail loft and they have a Singer 47k1 that hasn’t run in over 30 years. i cleaned it up and everything seems to be in order except for sewing. The timing is good and the top thread is perfect but the bottom is a complete mess. The bottom makes tons of loops, gets about 4 inches and then the thread breaks….. unfortunately my parents don’t remember much about it. I would like to get it working to ease the burden on some of their moderate duty machines by getting this one working well. I think it is a tension issue with the bottom thread but am not 100% sure about it. if anyone has any ideas I’m all ears! Thanks RJ