Has anyone else had problems with the Kohler redtech ecv940 engine blowing up on their exmark? The way they have the engine sit in sideways with the head next to the hydro causes it the valves to stick then it overheats and cooks itself. Had that happen on my 2013 exmark lazer Z x series at 1600 hours. My dealer said engine only has 2 year warranty. Now I've found out its a 3 year warranty so it should be covered. I just bought another engine from a friend with scag dealership cause I needed it fixed now.He told me exmark knows there's a problem and is working to redesign it but they won't admit it to the rest the world that there is a problem. It's obviously a design issue because they only have that problem in exmark and hustler mowers, which also sets the engine the same way. He said he's had several other guys with the same problem. It's helped him sell a number of scags! It don't sound like Kohler will reimburse the cost of a new engine theyd want to rebuild it. It has cracked heads as well. He's looking into seeing if they will warranty a rebuild. Anybody else heard of this issue? I'm not impressed with having to spend 3 grand O put an engine in a 2.5yr old 12k mower.