I bought a new Turf Tiger with 27hp Kohler Command Pro in 2006. Regular maintenance at home 4 acre lot weekly through seasons. Two years ago the engine shut down unexpectedly while mowing. Sounded like an alarm clock. The issue was that Kohler doesn't key the crank gear that that drives the camshaft. When the crank gear came loose, it caused the rotating assembly to go out of timing and damaged the valves and pistons. I found a supplier that had an aftermarket crank gear that was hardened and had a key slot in it. Had to drill the crankshaft and insert a steel pin included with the kit. New valves, crank repair, pistons and rings plus having shop do head & valve job, then reassembling at home was almost as costly as just replacing the engine, but I know it won't happen again. Other that reg maintenance, I've had no other issues. They have a poor design on crank and gear. It must have been happening progressively, because now it runs strong and no issues. If you are looking at one with the liquid cooled Kawasaki. reasonably priced, I'd go for it. G Luck