I know this is insane but I will ask anyways. When I leave my XT1 mower sit for a few days or week the fuel tank goes empty. I check under the "hood" and under the mower for leaks but don't find any trace of fuel on the ground. Last fall I filled the gas tank and put it to bed for the winter in the shed. Yesterday I went out, uncovered it and cranked the engine. Battery had plenty of charge but no start. Checked the fuel tank and sure enough it was empty. Checked under the mower, no signs of wet fuel or stains on the shed floor. I don't find any broken or loose lines. I even checked the oil to see if there was any fuel in the oil tank. Other than telling me I'm crazy does anyone have any thoughts ????????