I have done two. One with neck inplace and one with neck pull out(like Markeb) Neck in place is hard but if you warm it up in hot water to make it softer and use sum flat head screw drivers its hard but do able. If u remove the neck : un do the hose clamp on the tank neck( lot easeier to get to lower hose calmp to reinstall). Pull neck out inside cab. Put new grommet in. Push neck with hose on up thru the grommet( lots of fun hold ur mouth just right). Slide back down on fuel tank neck. You can leave the hose on the fuel tank but you will not beable to see the top hose calmp. Good luck!!
