DRIVING MOTORHOME NOTICED SMELL OF GAS & COASTED TO PARKING LOT. ANOTHER DRIVER NOTICED FLAMES FROM GAS TANK. FIRE DEPT PUT FLAMES. OUT. INSURANCE INSPECTOR NOTICED GAS SENDING UNIT HAD SHORTED. LINES HAD LOCKED TIGHTLY THE FITTINGS & ONE OF THEM NOT LOCKED TIGHTLY HAD A LEAK. *AK