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pkats 11-01-2009 06:53 PM

Winterizing propeller shaft seal
I am trying to winterize my boat, but every checklist I could find including my boat manual doesn't say anything about propeller shaft seal. It is lubricated with water and I presume have to be winterized somehow. Can somebody tell please me how to do this. There is a hose connecting seacock and the seal. Thank you. Paul.

xort 11-02-2009 06:27 AM

Is this a PYI dripless shaft seal or something similar? Contact the manufacturer for the straight scoop.

sailingdog 11-02-2009 07:13 AM

Photos would help, especially when you don't know what the piece of equipment is called or who makes it. It would also help if you said what kind of boat it was...

Welcome to Sailnet. I'd highly recommend you read this POST to help you get the most out of sailnet.

pkats 11-02-2009 10:53 AM

Thank you, I will try to get pictures. BTW, boat is Beneteau 343.

Liquorice 11-02-2009 11:10 AM

If it's a PSS there is nothing to do!
The carbon seal is a loose fit on the shaft so any water will self drain.
Only concern may be the water supply hose.
Make sure there is no water left in the hose, especially if it has a low spot.
sam :-)

xort 11-02-2009 03:38 PM

My understanding is that there is no need for water supply for cooling on a sailboat with a PSS shaft seal. It's only required on higher horsepower power boats.
The only hose attached to a sailboat PSS shaft seal is an air supply tube to prevent air lock in the bellows. That tube goes upwards above the water line, not down to a seacock.

pkats 11-03-2009 12:05 PM

From the manual:
The stuffing box is a rubber seal around the prop shaft, which allows the shaft to exit the hull and keep water out. Water is forced into the stuffing box via a thru hull and vent tube for lubrication. Once a year or every 200-engine hours grease the seal at "D" with 1cm3 of grease. The seal should be replaced every 500 engine hours or every 5 years. See the manufacturer’s directions for more details.

Vasco 11-03-2009 12:42 PM

It's a Volvo shaft seal.

pkats 11-03-2009 01:33 PM

How do I winterize it? Do I have to do anything? Thank you.

Vasco 11-03-2009 02:30 PM


First where are you located? Second are you staying in the water or hauling for the winter. There are many Beneteaus here in Toronto that are hauled for the winter. AFAIK they don't do anything to the shaft seal. The water drains out. When you launch in the spring make sure you "burp" the seal to get the air out of it. If you don't it will heat up and fail. Also don't you just love having to change this seal out every 500 hours???

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