Jabsco 5330-9101 Flexible Impeller Pedestal Pump
As far as I can tell, the spring does not corrode, the carbon seal gets stuck and cant move because the bronze seal housing corrodes. the way these work
construction wise is
you have a bronze or brass outer case.
the spring goes in first
then the carbon face with a slim rubber oring on the outer edge of the carbon seal goes into the brass seal housing.
the lip of the seal housing is peened over to retain the carbon face seal.
gets into the metal seal housing, the rubber ring cant slide or roll and the carbon face seal wont move and seal against the white ceramic seal.
you can decide to tolerate dribbling out of the weep slots but then you have salt
water spraying dribbling on your metal causes a lot of rusting.
the jabsco seal years ago used to use an external spring but the new seals the spring is inside the seal.
as a way to try to help my situation, I pulled off the bronze spacer ring from the white ceramic side and replaced with a silicone rubber ring to act as a spring, pushing the ceramic seal against the brass carbon side and this gets me some more time. but eventually that also will fail either to rubber hardening or perhaps the carbon face wears down.
picture of the seal. The indentations keep the carbon face seal from rotating in the outer brass housing