ricktara, having worked with boat systems for many years, I have finally come to the realization that old boats (like old bodies) may demonstrate one symptom, which actually reflects multiple causes (meaning several things wearing out simultaneously). As a consequence, rather than waste a certain amount of time and capital resolving a single
solution, only to later discover another part of the puzzle has failed, requiring tearing something odious apart (again), in the long run it is more economic and less frustrating, to overhaul
the whole works and start from a new beginning. You don't fix critical systems by resolving details, you rip out the offending system and replace it in one whack. I know there are a whole bunch of denizens here that will object, but there are enough experienced folks who will acknowledge this phenomenon. As I tell the unfortunate victims of my services, "you can pay me now or pay me later". The smarter ones pay attention, the more resistant ones pay me several times for multiple visits. Look up the concept
of preventive maintenance
as it applies to aircraft maintenance
, ship overhauls, or keeping a critical task online. If it ain't broke, fix it before it does. Or don't.