Have a General 14inch and the device on the back that controls the blade tension seems to be stuck. Either the body of the upper fly wheel is pressing too hard on the screw tensioner or the tensioner is jammed somehow in the groove or track that it fits in. Either way when I tighten or loosen the blade the screw might leave contact with the push area but I don't see any movement of the spring. Short of taking a screw driver and a hammer and whacking away to force the 2 sides apart I'm open to suggestions
Moyo