Free manual here:
http://www.searspartsdirect.com/part...mManualTabPage
Shows oiling diagram. I have the manual, thank you I'll get some oil today ..
Needle threaded from front to back? yes
Is the needle set correctly? yes
Did you remove the feed dog plate and clean under it? yes
If you've had any needles break it may need a tune-up/adjustment. There could be a thread stuck in the tension area...
No needle broke in the past year.
Did you try loosening the bobbin tension? No, I tightened it a half turn each time until it was just snug enough to where the thread comes our smoothly. But only after the issue started.
Did you thread the machine with the presser foot up? always
Using correct needle size for fabric weight? same as always, but use the same needle when I did the belly bands (my last order). Changed it !
Bobbin area clean and bobbin placed correctly (unwinds clockwise)? yes
Are you using a quality brand needle? not sure , will pick some up today.
Some machines are picky and cheaper needles can cause problems..
If I think of anything else I'll be back!