Lawn looks great in the pictures!
I checked the blade heights yesterday and found them to be holding just fine. That did involve raising and lowering the deck many times throughout the process of mowing last week and the cleanup afterward. The measurements were the same as prior to mowing last week. I did make one very minor fine adjustment. I will check again after mowing today and let you know if anything changes. Otherwise, once again with thanks to you and others that offered their help and advice, I think this problem has been solved.Hey Bruce, as long as your at it, raise and lower the deck a few times from min to max, then remeasure to see if the deck stays level. I’m curious if it holds the level.
I wouldn't be a bit surprised to learn that the "deck tool" which is provided with the tractor is to speed the set up of new machines at the dealership and also for first time or newer machine owners. Let's face it, most people simply want the grass cut and many don't really know the difference between a real precision cut and a general mowing...........if the grass is shorter when they are done, they are happy.When I was using the tool that came with the tractor, I was able to make the adjustments as laid out in the manual to level the deck. Using that tool alone, it was right where it was supposed to be. Unfortunately it also masked the real problem with the cut quality.
I have come to believe that little tool that comes with the tractor is fine for making quick checks, but to do it right, the yellow tool or an equivalent is required.