How to thread singer 1021?

SOURCE: Birds nests under fabric and thread breaking.

My manual says the needle thread tension is too loose , OR the needle is to fine/heavy for the thread being used.

SOURCE: I need a threading diagram

Hi. Check out: http://www.sewusa.com/Sewing_Machine_Threading_Diagrams.htm

Let me know if this helps.

SOURCE: thread on bobbin looping

Sounds like you need to adjust the bobbin casing tension (tighten the little screw on the bobbin case). I would also oil the face of the bobbin casing so that the thread wont snag or tug on it at all.

SOURCE: Kenmore 100 stitch 385 Bobbin thread does not

make sure that you have enough of a tail on your thread, at least 3-4 inches and hold it with your left hand until the needle picks up the thread. I am assuming that you have your bobbin threaded correctly and your needle is inserted with the flat side facing the rear of the machine.