I'm a Walker guy. Love them and my business is based on them. I looking into buying a new diesel. Just whating to know what kind of life in hrs. and if any problems you have. I need to know if I can justify 9000.00 on a 20 hp. gas or 12200.00 on a diesel. Or maybe someone has a good used diesel or watercooled unit for sale. Does anybody have the new 31 hp kohler?