At about 1345 Alaska standard time, an amateur-built Kolb Fire Star II lost engine power and crashed into trees after takeoff from Birchwood Airport. The pilot was not injured. The pilot said the airplane had been stored outside unused for two years. He made two successful touch-and-go landings, but the engine quit on the third takeoff at about 50 feet agl. An FAA inspector found both carburetor float bowls contained murky, silty and rust-colored fuel.