There is a ton of misinformation in this thread. As stated I've owned 16 of them over the years. Thousands of hours and NO catastrophic failures. There is a propane model on the side of my house right now. If your a tech sure you're only going to see them when they're broke. What about the other 99.9% that are running flawlessly right now. Every toll booth in this area runs a Generac. Any engine is usually only as good as the care it gets.