I have a 2012 H20B and having issues putting fuel into the boat. When pumping fuel into the boat, the gas is backing up and slashing out of the filler neck. I am assuming this is a fuel tank venting problem so I traced the vent tube from the tank and it runs into this round black cylinder type device that is around 2" x 12" or so and then eventually the vent line runs out to a vent outlet in the splash well. Does anyone know what this black cylinder device is? My thoughts is it's some EPA device to restrict fuel fumes from getting out? I am thinking this could be a root cause for the vent problem? Has anyone else experienced some thing similar? Any help is appcreciated.