Dixie Chopper XCaliber is an awesome mower. Can't say anything bad about the EFI engines. Dixie Chopper has been using Kohler EFI's since the '90s with very few problems.
and my Honda Civic went 145,000 miles with no EFI problems but NOW it's a time-wasting nightmare. I never have these problems with my 62, 3/4 Chevy. Start / Drive / Have fun . The ONLY thing that I have to do is if I let it sit for a week, I have to squirt some gas into the carb to start or grind the starter until the float bowl fills. Humans have gotten soft and now must pay and pay and pay for the convenience.
Now... having said this, a fuel injection set-up on an air-cooled engine is much simpler than in a car so maybe in this application it's a reasonable upgrade over a carb...