168 pampered hours and she took a dirt nap. Upon disassembly.... the #1 cylinder sleeve dropped out of the alum. block about 1/4"......somehow the sleave managed to slip by the bolthead that covers the bottom edge of the sleave and the cast alumn.???? The rings went beyond the sleave at TDC, expanded, and then Poof! Currently looking for an alternative to correct this..... Anyone put the CV18 in this mower.......I see Walker quickly removed the TH series from their mower line-up and replaced it with the CV18. I haven't looked in-depth as to if this is feasible with my mower......... I've heard this is another Kohler to stay away from much like 25hp of earlier days. Your/Any input is greatly appreciated!