FOLLOWING THE LOSS OF ENGINE POWER THE PILOT SWITCHED FUEL SELECTORS FROM THE BOTH POSITION TO THE LEFT TANK AND ATTEMPTED AN ENGINE RESTART. DURING THE FORCED LANDING THE AIRCRAFT STRUCK A POWER LINE AND DESCENDED OUT OF CONTROL TO GROUND IMPACTED .25 MILES SHORT OF THE THRESHOLD. AN EXAMINATION OF THE AIRCRAFT REVEALED THAT THE RIGHT TANK CONTAINED 2.5 GALLONS OF FUEL AND THE LEFT TANK 6.5 GALLONS OF FUEL. TWO AND ONE HALF GALLONS IN EACH TANK IS UNUSABLE.