Originally Posted by miriam

Mine may be missing a part. It wants to only sew in reverse. The model number is 158.17550
I'm not sure my picture is deep enough. I'm thinking there has to be some spring or part that pulls the machine back in to sew forward. OOPS I can see that yours is NOT the same. Mine has only two knobs. The reverse is in the middle of the top knob. It does not pop back into place. I am looking for a picture of the insides of that machine. I may make a new post about it. Anybody out there have one that works? Mine has has enough Tri-Flo that everything else works beautifully. Love the machine but it is a little hard to use when it only goes backwards.