When the power went out due to Wed's storms, I went over to my Mom and hooked up her generator to keep her freezer & refrigerator going. I went back later to re-fuel it. After gassing it up, I was unable to start the thing. It had no compression!! It had been running fine prior to shutting it off to re-fuel. The generator is a 5000 watt battery start with a Robin OHV single cylinder engine. It is about 5 or 6 years old, probably has no more than 10 hours run time, and I crank it up every month or so to keep it opereational. The engine turns over freely by hand (or with the starter) and it makes no pecular internal sounds which would hint at mechanical damage or brake-down. Does anyone have any suggestion what to look at before I begin a major engine tear-down? There is no manual compression release, and I am not aware of an automatic release.

[IMG]http://i1128.photobucket.com/albums/m494/rrose002/post%20pics/troy_bilt.jpg[/IMG] [B]I am trying to learn how to adjust the valves on my Honda 160 cc lawnmower engine so I took the four small bolts off the valve cover but it seems to be stuck or still attached somewhere, I was hoping someone would be familiar with this situation and maybe share some advice. I am attaching a photo of the engine I have. Thank you[/B]