Bad Boy with Kohler. 27 hp I believe. I have a couple other lawn mowers for the little stuff, a 2 cycle weed whacker, 2 cycle chainsaw, four cycle rototiller and “push weed whacker”, and a 1960 John Deere tractor. The one that I worry about the most is the tractor, since it was designed for leaded fuel.
The fuel system of the Kohler can handle the alcohol as long as you use the marine additive.
The issue is metal carburetors with bronze orifices which don’t absorb the alcohol and swell.
Plastic carbs have to be drained for storage or they quit working quickly (and they are not cheap to replace).
Use CD-2 in the gas if you can find it. Usually at Wal-Mart