A GLASAIR II PLT USING THE AUX FUEL TANK RAN THE ENG OUT OF FUEL AND LANDED OFF FIELD AFTER HE FORGOT TO SELECT THE FULL WING TANK FOR HIS FUEL SOURCE.

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MY GLASAIR SUPER II FT HAS 2 FUEL TANKS. THE WING TANK HOLDS 44 GALS AND IS ONE CONTINUOUS TANK. THE SECOND TANK IS AN 8 GAL HEADER TANK LOCATED BTWN THE ENG AND COCKPIT. THIS 8 GAL TANK IS VERY SELDOM USED; AS OUR WING TANK GIVES US OVER 4 HRS OF FLT TIME. WHEN I DEPARTED ZZZ TO ZZZ1 FOR REFUELING; I SELECTED THE 8 GAL HEADER TANK. I TOPPED OFF BOTH TANKS AT ZZZ1; DEPARTED TO A PLEASURE RIDE; AND WHEN THE SELECTED HEADER TANK WENT DRY IN THE TFC PATTERN; I SWITCHED ON THE AUX FUEL PUMP BUT IN THE EXCITEMENT OF THE BACKFIRING AND SPUTTERING ENG; FORGOT TO SWITCH TANKS. BECAUSE WE SO SELDOM USE THIS TANK; I HAD BEEN COMPLACENTLY JUST TURNING ON THE AUX FUEL PUMP WHEN I PERFORMED MY PRE-LNDG GUMPS (GAS; UNDERCARRIAGE; MIXTURE; PROPS AND SEAT BELTS) AND TKOF CHKLIST. THEREFORE WHEN I HAD AN ACTUAL EMER; THE FUEL SELECTOR GOT MISSED! SOLUTION FOR CORRECTING THIS EVENT IS: INCLUDE THE FUEL PUMP AND FUEL SELECTOR POS IN THE GUMPS; TKOF CHKLIST; AND EMER PROCS. AS AN ADDED REMINDER I HAVE CREATED A 4X4 INCH HOT PINK CARD THAT READS...CAUTION -- HEADER TANK IN USE. THIS CARD WILL BE ATTACHED TO OUR CHKLIST AND ANYTIME IN FLT OR ON THE GND; THE FUEL SELECTOR IS SET TO 'HEADER TANK;' THIS CARD WILL BE PROMINENTLY DISPLAYED ON THE INST PANEL. FORTUNATELY; I DID NOT TRY GETTING BACK TO THE ARPT AND MADE AN EMER OFF FIELD LNDG IN A FIELD. THE CROPS WERE ABOUT 8 INCHES HIGH; AND THE LNDG CREATED NO INJURY OR DAMAGE TO THE ACFT WITH THE EXCEPTION TO 2 WHEEL PANTS ATTACH BRACKETS; WHICH ARE A VERY EASY REPAIR.