On June 20, 1993, at 1330 mountain daylight time, a Aeronca 7AC, N2915E, conducted a forced landing in a field approximately one quarter mile north of the east/west runway at Front Range Airport, Watkins, Colorado, following a total loss of power. The private pilot and his passenger were not injured; however, the aircraft sustained substantial damage. Visual meteorological conditions prevailed for this local area personal flight and no flight plan was filed. The occurrence was reported to the Safety Board on July 1, 1993. At the time of the power loss, the aircraft was at an altitude of approximately 300 feet above ground level, over farm fields which were soft as a result of recent rains. Following the accident, the engine was examined by a mechanic. His report is attached and provides information that the carburetor fuel screen was plugged with debris which could have caused fuel starvation. The source of the material in the filter screen is unknown; however, the mechanic said it did not appear to be from the aircraft.