I'm the OP with an update. I'm finally making progress. First thing, I needed to move the mower away from a wall and into the center of my working area of the garage. But the battery was dead. It was six tears old. So new battery installed, moved mower and inflated tires. Used my floor jack to lift mower and tried to remove bolts with my 20V impact driver. No good. Then I found my breaker bar which is a half inch drive, but I don't have a 16mm socket with a half inch drive. So off to Auto Zone to get a socket. I was then able to remove the bolts. I'm now in the process of scraping the deck clean. I'll finish cleaning today and reinstall the new blades.
So it turned into a bit of a project but that's fine because I'm retired and have plenty of time.
So it turned into a bit of a project but that's fine because I'm retired and have plenty of time.