Which shaft seal?

[BabaYaga]

PSS - burp and replace

Volvo seals need to be maintained (burped and greased) and are therefore a poor choice if access to the stern gear is difficult. They need to be replaced at fairly short intervals (5 years?).

I have a PSS seal since five years back and I am perfectly happy with it. However, this seal also has to be burped if the boat has been out of the water (not greased though) and the manufacturer states that the bellows should be replaced every 6 years.

 

[vyv_cox]

I have a PSS seal since five years back and I am perfectly happy with it. However, this seal also has to be burped if the boat has been out of the water (not greased though) and the manufacturer states that the bellows should be replaced every 6 years.

Current models come with a vent so that burping is not necessary. A small diameter hose is taken from the vent to a position above the waterline. This ensures that the seal faces are always submerged.

 

[charles_reed]

I have a PSS seal since five years back and I am perfectly happy with it. However, this seal also has to be burped if the boat has been out of the water (not greased though) and the manufacturer states that the bellows should be replaced every 6 years.

I was informed bellows replacement should be every 7 years - as mine was 14 years old, I changed last summer and found the old bellows as good as new. It had done just under 5000 hours.