Re: fuel line, pump ball
I had a line disintegrate internally after 12 years. Was the Quicksilver issue orig. equip. Released little pieces of tan crud that got into the fuel pump and internal fuel filter. Made a big mess. Best to get a new line and Quicksilver bulb before you have to spend more money.
Is your water separator a spin on filter? If so, I'd imagine just get another and spin it on. I have no experience with marine applications, just over the road.
Mark