I have a kohler engine (CV15S) that dies when it gets hot. It has no fire at the spark plug at this time. I can let it sit for awhile and it will crank back up, run for another while and stop again. Any idea what might be the problem?

Failing ignition coil.

Not sure if it has a temperature sensor. Heres where you can download Kohler owner and service manuals in PDF form :

http://www.kohlerengines.com/service/manuals/manuals_results.jsp