I have the 27 hp Kohler on a Z...new machine only mowed with for 2 hours. A couple of days after mowing my yard I noticed 4 brown spots. I wouldn't automatically assume it was the mower, except the 4 brown spots are exactly in the same spots where I stopped the mower for a couple of minutes. Obviously the engine was so hot it burned the grass when I stopped. I searched the forum and found a thread here about the same issue: http://www.lawnsite.com/showthread.php?t=73391&page=3&pp=10 Back in August PJ mentioned something about contacting the dealer to get a shield kit... is that still the best advice? Is this still an issue with the Hustlers? Shouldn't they just install the shields at the factory on machines with Kohler engines that run that hot? Other than that I love the mower, but I hope my grass comes back out in these four spots!