A CESSNA T210R PLT HAD TO MAKE AN OFF ARPT LNDG ON A ROAD AFTER FUEL EXHAUSTION. EXTENSIVE ACFT DAMAGE PROP AND BELLY SKINS AS PLT HAD TO MAKE A GEAR UP LNDG. LNDG OBSTRUCTIONS WERE TREES AND PWR LINES.

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IN SUM: A CESSNA 210R PLT PLANNED A SOLO IFR FLT FROM FXE TO M11 WITH HKS AS AN ALTERNATE. RPTR USED THE OWNER'S MANUAL FOR PERFORMANCE DATA AND BACKED THIS UP WITH A COMPUTER FLT PLAN THAT ALSO USED THE ACFT MANUAL PERFORMANCE FIGURES. RPTR HAD TO MAKE A WX DEV THAT ADDED 20 MINS TO THE FLT. AFTER 4 HRS FLT; THE ORIGINAL FLT PLAN TIME; RPTR CHKED THE FUEL GAUGES WHICH SHOWED 10 GALLONS EACH SIDE. THIS WAS RIGHT ON SCHEDULE. WHEN IN VMC AND WITHIN 20 MI OF THE DEST; RPTR CHKED THE FUEL GAUGES AGAIN TO FIND THAT RPTR NOW HAD ONLY 10 MINS OF FUEL; THE GAUGES WERE BELOW THE RED LINE. THE DEST WAS ENDURING HVY RAIN. RPTR'S GPS GAVE ANOTHER ARPT 16 MI AWAY; MCB. WITHIN 6 MI OF MCB; THE ENG SPUTTERED AND QUIT AT 1500 FT AGL. THE RPTR LANDED WHEELS UP ON A ROAD AVOIDING PWR LINES AND TREES. THE ACFT WAS LIFTED ONTO A TRAILER AND TAKEN TO MCB. A PROP SHAFT RUNOUT SHOWED NO BENDING. A NEW PROP WAS INSTALLED AND THE ACFT WAS FERRIED TO HKS FOR REPAIRS. THE RPTR FOUND THAT ACTUAL FUEL BURN WAS 16 GALLONS MORE THAN THE HANDBOOK (22 PERCENT MORE). THE PLT HAS LOW TIME IN ACFT ON LONG TRIPS. THE RPTR BELIEVES THAT THE FUEL FLOW INDICATOR WAS INACCURATE. THE RPTR IS SURE THAT THE FUEL TANKS WERE FULL BEFORE DEP AS THERE WAS FUEL SLOSHING OUT OF THE CAPS AT DEP. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR'S ACFT IS BACK IN THE AIR AFTER A $46000 REPAIR BILL INCLUDING A NEW PROP AND EXTENSIVE NEW BELLY SKIN. THE INSTS WERE ALL TWEAKED AND NOW THE FUEL FLOW IS DOWN TO 17 GALLONS PER HR VICE THE 20 GALLONS PER HR OF THE TRIP. THE TACHOMETER WAS FOUND TO BE READING 125 RPM LOW CAUSING MOST OF THE EXCESSIVE FUEL FLOW. NO FUEL LEAKAGE WAS FOUND. THE RPTR HAS MADE NO MODIFICATIONS FROM ITS STOCK CONDITION THAT MIGHT HAVE PRODUCED EXTRA DRAG.