I have a casement window which has a discontinued operator Part number 20973 (believe GU Part number). This is no longer available, but it appears your 39-316 would be a replacement. This is split arm operator with dimensions of the arm that attaches to the window being 4 7/8 inches. From inside, the window opens right to left.
Am I correct that this operator would be a replacement? Besides the operator, are any additional parts required for this change?
Thanks in advance for your help.
Jim