I HAVE A BX2370 THAT HAS A STOPPED-UP FUEL TANK TO GET ME BY UNTIL I CAN PULL THE TANK I HAVE STARTED USING A AUXILARY TANK AND A AUX. PUMP (THE EXACT SAME PUMP THE TRACTOR HAS ON IT) SINCE THEN IT RUNS AND PERFORMS PERFECTLY BUT WITH ONE EXEPTION IT USES EXCESSIVE AMOUNTS OF FUEL NOW, LIKE 3 GALLONS IN TWENTY MINUTES OF MOWING AND I HAVE FOUND NO LEAKS. PLEASE DOES ANYONE HAVE A CLUE AS TO WHAT WOULD CAUSE THIS ?