PSS shaft seal leak

[william evans]

At 1000 rpms it does not leak, at 1500 leaks like a sieve?

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[Ward Woodruff]

Have you tried flushing the seal faces by pushing the bellows/carbon ring away from the metal ring on the shaft?

Ward Woodruff

N33 #8 Margery

Niantic Bay, CT

On Oct 25, 2025, at 1:51 PM, william evans <capten...@gmail.com> wrote:



At 1000 rpms it does not leak, at 1500 leaks like a sieve?

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[William Evans]

Not yet will give it a try

William Evans
“Companionship “ 30U #465
West River MD.

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[Ward Woodruff]

How long since you replaced the rubber bellows and O-rings?  I believe the recommendation of interval is every 5 years. 

Ward Woodruff

N33 #8 Margery

Niantic Bay, CT

On Oct 25, 2025, at 5:12 PM, William Evans <weeshop...@gmail.com> wrote:



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[William Evans]

Several years ago.

Bill

William Evans
“Companionship “ 30U #465
West River MD.

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[William Evans]

Ward,

Thanks for advice. I burped her and quit leaking.

Was suggested to move collar slightly to add a little compression.

Thoughts?

William Evans
“Companionship “ 30U #465
West River MD.

[Ron Schryver]

William, the manual states that the shaft seal needs to be burped immediately following a launch to release the air trapped inside. If it's not leaking I would recommend that you do not increase the compression. The only thing that will accomplish is wearing out the carbon stator faster.

Regards....Ron

Ron & Diane Schryver

"Alpha Waves" 1987 NS30U #393

Georgian Bay Midland ON

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[William Evans]

Thanks

William Evans
“Companionship “ 30U #465
West River MD.

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[Thor Powell, Nonsuch 26, Victoria BC]

When PSS first cam on the scene it was revolutionary.  How ever not without some caveats.  There are other approaches now that I think are more robust and deserve consideration. 

https://fybmarine.shop/volvo-penta-rubber-stuffing-boxes

https://lasdrop.com

[Bruce Clark]

Otherwise known as ‘burping’ the bellows.

Bruce Clark

N30, ’Nonsuch

Whitby YC, Lake Ontario

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[William Evans]

Do have to say “excuse me “?

William Evans
“Companionship “ 30U #465
West River MD.

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