I have a 2006 with the holding tank that has a Jabsco 18590 mounted on the top of it. It is jammed up and not sure if it has ever had a service kit done. I was going to jump right in and disconnect it an unscrew it from the tank and then in my old age said wait a minute let me clarify a few things. First I could not find any manual on removing the pump from the tank but I think the nuts that hold it must be molded into the tank. Before undoing that is there anything to know there? Do not want the nuts falling into the tank if they are not molded into it. Anyone had to do this and can offer some advice? Word of wisdom? And of course I expect the it sucks to be you comments.