Ethan, is it that the PTO will not turn *ON* your QA36 or it will not turn it *OFF*? Your post at 12:31 appears to indicate that it will not stop your QA36 from turning. If it won't turn it off it could be that you have the PTO slid to far onto the crank shaft and the throw out is bottoming out on the end of the crank. If you look at this cut away view you can see how close the end of the crank is to the back of the center button.