The pilot reported that he had just picked up the aircraft at the completion of some maintenance work and was returning to his home base. Prior to departure, the pilot preflighted the aircraft, but did not pull the fuel caps to visually check fuel quantity, instead the pilot checked the caramel colored sight glass in the cockpit, which when the fuel tanks are full, the sight window looks the same as when empty. The pilot stated that he assumed that the aircraft had been fueled, however, it had not during its stay for maintenance. After departure, and while in cruise at 4,500 feet above sea level, the engine abruptly stopped operating. Upon determining that the automobile traffic on a nearby highway was too dense to risk a landing he selected a series of fields just east of the highway. Two fences sectioned the fields across the intended landing path, and the surface of the fields was soft and mushy. During the landing roll, the nose dug in, the nose landing gear collapsed and the aircraft nosed over. A Federal Aviation Administration Inspector examined the aircraft the day following the accident and found no gas within the fuel tanks or the fuel strainer.

The National Transportation Safety Board determines the probable cause(s) of this accident as follows:

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