PSS shaft seal - experiences?

[vyv_cox]

Vyv,

For interest - I've recently discovered bad corrosion on my boat where an old rubber Halyard seal was affixed to the (316 SS) stern tube. I asked a surveyor to take a look at this (because there was talk of needing to replace the tube as it was diagnosed as electrolytic action by the engineer) and he reported SS corrosion consequent of oxygen starvation where the rubber seal was clamped to the tube. Hence (as not electrolysis and therefore no damage further along the tube in the hull section) I could cut off the badly corroded section and fit the seal on undamaged tube. Maybe that could be the issue which you've experienced?

rob

There are photographs of exactly what you describe on my website, under Metallurgy>Crevice corrosion, although in this case the damage is on the shaft beneath a rubber cutless bearing. I don't think that is what caused my seal face pitting, as the boat was hauled out at the time.

 

[maxi]

My PSS, fitted to a far-from-pristine shaft has been superb, problem free. My neighbour boat has completed many thousands of miles on her PSS shaft seal, also trouble free.

My previous seal, Tidesmarine, lasted just 2 years and when it failed it failed spectacularly!!

 

[Houleaux]

My PSS, fitted to a far-from-pristine shaft has been superb, problem free. My neighbour boat has completed many thousands of miles on her PSS shaft seal, also trouble free.

My previous seal, Tidesmarine, lasted just 2 years and when it failed it failed spectacularly!!

Could you elaborate on the Tidesmarine failure please? As I have one fitted, I'm a little curious.......

 

[antares]

another plus for the PSS, now in third season and , so far, faultless.