Machine runs when it shouldn't
I'm sorry if this topic has been covered previously, but I don't know how to ask the question to find an answer! I have a Singer 66-16 in a sewing cabinet, with a knee controller. It sews like a dream, but lately when I release the knee lever, the machine keeps stitching. It actually doesn't even slow down. My first guess was that I needed to adjust the belt, but that didn't seem to help.
Can anyone suggest a solution, and/or a link to a blog or video on how to fix this problem.
Thank you so much for any responses.
Carol