Winterizing propeller shaft seal - SailNet Community

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Old 11-01-2009
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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.
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Old 11-02-2009
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Is this a PYI dripless shaft seal or something similar? Contact the manufacturer for the straight scoop.
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Old 11-02-2009
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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...

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Old 11-02-2009
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Thank you, I will try to get pictures. BTW, boat is Beneteau 343.
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Old 11-02-2009
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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 :-)
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Old 11-02-2009
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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.
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Old 11-03-2009
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From the manual:
STUFFING BOX
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.
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Old 11-03-2009
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It's a Volvo shaft seal.
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Old 11-03-2009
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How do I winterize it? Do I have to do anything? Thank you.
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Old 11-03-2009
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pkats,

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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