Thank you guys.
I am still not much closer to figuring out this jigsaw with a couple pieces missing. I am going at the mower again tomorrow. I will attempt to remove the mowing deck from the tractor and therefore get a better look at it. What I REALLY need is a workshop or repair manual or some pictures of the mower deck on a fully functioning one of these mowers so I can compare what i have with what a fully functioning model has....and how it all should look like.