Is there a manual valve between the head pump and blackwater tank
2002 342 Fiesta Vee Black water tank is behind mid cabin wall on port side I am pretty sure.
My head pump appears to sort of be turning but not flushing water. I had marina winterize and now when I hit electric flush the pump/macerator growls like it does for a second or two and then trips the breaker. Acts like its pumping on a dead head or is it just toast. Only thing I can figure is either a manual valve is closed or the pump is toast.