I picked up a 1968 Jetstar 3 and the PTO doesn't seem to work/engage. If you pull on the lever while the engine is running it will turn the shaft but it doesn't have any power on it. It wont snap into gear? Sorry, I'm not sure what the correct term is but it seems like there should be some sort of adjustment on it but not sure. This is the only tractor I have really been around and nobody I know seems to know anything about these MM. IF anyone could give me an idea of how this is supposed to work it would be much appreciated. I bought a operators manual and a shop manual and neither really mention much about operation/repair or adjustment of the PTO.