Thanks everyone. I guess I should have mentioned it is a push mower with a 4-cycle engine.
Compression seems fine, and I am definitely getting spark. I have a can of starting fluid, but it did very little, if not anything.
So as Benzmac pointed out, I probably have a fuel problem. I did dump the last of the fuel left in my 5-gal. gas can.
I will have to borrow a mower this weekend, and then I will drain the tank and remove the carburetor. Hope this will do it.
Or...maybe it's the OVP?
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car