Incident Details
A pilot reported that before takeoff, he had fueled only the left fuel tank; the right tank was empty. Shortly after departure, the pilot performed a left forward slip of approximately five degrees for about 30 seconds. Immediately after returning the aircraft to level flight, the engine lost power.
Pilot Report
The pilot attempted various procedures to restore engine power but was unsuccessful. He subsequently executed a forced landing onto a small pond. During the landing, as the aircraft slowed and came off the step, the left float struck submerged willow sticks, causing the float to sink. The left wing then dropped and struck the water.
Fuel System
According to the pilot, the fuel tank lacks a drain. He noted that unless approximately one gallon of fuel is drawn through the gascolator, water contamination would not be visible.
Probable Cause
No probable cause was stated in the source.