Thread breaking. Kenmore 38512712090. My top thread keeps getting tangled around bobbin section

Question

Kenmore 38512712090. My top thread keeps getting tangled around bobbin section and breaking. I've tried everything I can think of.

Hii got this machine from a friend and it worked fine at first. I tried fixing the bobbin but now it doesnt work like it used too. I can see the top thread get wrapped somewhere in the bobbin/shuttle hook before it snaps. Any help?thanks - and i cant find a manual either