my side by side fail test showed that the older jabsco pumps worked longer. these new ones have a spring that fails. then it goes CRUNCH and passes out of the hoses then thru hull
fitting. this new part was sold to me 2015 summer.
the old ones had no such spring.
once the spring fails, the plunger has a slight lag in the action. it still works, but differently. that is where mine is now.
the older pumps are far superior to the new ones.
now to find some older pumps to rebuild
the pump that came with boat lasted well over 10 yrs. these new ones are self limiting to mebbe 2 yrs than spring is done. oops. yup they are not well engineered