On August 13, 2006, at 1630 eastern daylight time, a Cessna 150L, N6882G, registered to Blue Sky Adventures LLC, operating as a 14 CFR Part 91 personal flight, reported a total loss of engine power in cruise flight and made a forced landing to a sunflower field in the vicinity of Bunn, North Carolina. Visual meteorological conditions prevailed and no flight plan was filed. The airplane received substantial damage. The private pilot reported no injuries. The flight originated from Louisburg, North Carolina, on August 13, 2006, at1615. The pilot stated the airplane was topped off with 100 low lead fuel before departing. The fuel sumps were drained before and after the airplane was refueled. The pilot stated he departed, climbed to 1,400 feet and leveled the airplane off in cruise flight. After about 10 minutes the engine started to sputter, the engine lost power, and the propeller stopped. The pilot attempted an engine restart, which was unsuccessful. The pilot made a forced landing to a sunflower field and the airplane nosed over inverted on landing roll out in the soft dirt. Examination of the airplane after the accident revealed the left wing and engine firewall received structural damage. The FAA examined the airplane at the crash site. Continuity of the gear train was checked by turning the propeller by hand. A field inspection of the fuel system revealed approximately four to six ounces of water was collected by disconnecting the fuel line at the carburetor and draining the fire wall fuel strainer into a clear container. Water was also observed in the primer system.