I have a 3-4 year old Husqvarna backpack blower and the grommet for the gas tank fuel lines can rotate. When I am putting on the backpack blower its gets shifted around at odd angles and some gas leaks out of the grommet I am pretty sure. When its on my back I think its fine unless I lean over. I am thinking the grommet rubber is dried unless that's the way it was made.