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Author Topic: A question for those who installed a packless seal system  (Read 261 times)

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David Discenza

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A question for those who installed a packless seal system
« on: June 12, 2022, 09:26:11 AM »

I'd like to know how you solved venting the seal. Two feet above the waterline would put the vent hose at the top of the companionway in my '93 34'. Thanks to all who reply.
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CTYP12441293
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waughoo

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Re: A question for those who installed a packless seal system
« Reply #1 on: June 12, 2022, 11:42:47 AM »

My dripless is not vented.  It seems to work fine and have not had any issues.
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Alex - Seattle, WA
91 mk1.5 #1120
Std rig w/wing keel
Universal M35
Belafonte

David Discenza

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Re: A question for those who installed a packless seal system
« Reply #2 on: June 12, 2022, 12:08:42 PM »

Waughoo, does yours have a vent on it? If it does, did you just cap the vent?
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CTYP12441293
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Noah

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Re: A question for those who installed a packless seal system
« Reply #3 on: June 12, 2022, 01:24:17 PM »

The “new styles” have vents. Don’t know what year they changed. Mainesail has an article on his  “Marinehowto” website I believe, discussing venting fittings. Some folks I have read vent up under head sink or into cockpit locker.
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1990 hull #1014, San Diego, CA,  Fin Keel,
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Ron Hill

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Re: A question for those who installed a packless seal system
« Reply #4 on: June 12, 2022, 01:46:10 PM »

Dave : You could vent by using a small hose and going up into the starboard cockpit locker.

A thought

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Ron, Apache #788

Patches

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Re: A question for those who installed a packless seal system
« Reply #5 on: June 12, 2022, 07:09:17 PM »

I have a Mark 1.25 (hull no. 1016), and vented my PSS dripless into the sink cabinet in the head.  I epoxied a piece of wood high under, and to the right of, the sink, to what is essentially the back side of the liner that forms the forward wall of the aft cabin.  I ran the vent hose from the PSS vent nipple to a Taco Hy-vent air vent, as recommended by Mainesail in his article on the "Marine How To" (yet another invaluable piece of writing on how to do things correctly on your boat.):

https://marinehowto.com/installing-a-pss-shaft-seal/ 

I then used a small conduit clamp to mount the vent hose to the piece of wood I epoxied in place. 

Working perfectly for 18 months now.

Patches
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waughoo

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Re: A question for those who installed a packless seal system
« Reply #6 on: June 12, 2022, 07:25:58 PM »

My pyi is an older one without the vent fitting.
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Alex - Seattle, WA
91 mk1.5 #1120
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Universal M35
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David Discenza

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Re: A question for those who installed a packless seal system
« Reply #7 on: June 13, 2022, 06:36:07 AM »

Patches,
Thanks for providing that link and for your solution. I think I will do the same. It sounds like your boat is a mirror of mine. The port lazarette is behind my head.
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CTYP12441293
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Jeff Kaplan

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Re: A question for those who installed a packless seal system
« Reply #8 on: June 13, 2022, 07:44:26 AM »

The installer really messed up, as he put the vent hose into the heat exchanger, which is actually done on speed boats, not slow boats, which caused quite a squeal sound and excessive heat on the shaft. I went to the web site and found this to be true. I replaced the vent hose  with about 6' of hose,  drilled a hole in the head sink in the corner and routed it up thru there. Never a problem. Easy fix, hose must vent above the water line.
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#219, 1986 tall rig/shallow draft. "sedona sunset" atlantic-salem,ma

David Comando

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Re: A question for those who installed a packless seal system
« Reply #9 on: June 22, 2022, 03:38:50 PM »

I have an older PYI or PSS dripless on my 1986. I did replace it a few years back with the same one, non vented. I do be sure, excuse the what comes next, to "burp" the fitting to remove any air caught in the bellows when the boat is launched, or after a diver, (me), cleans the bottom. I have had no issues with this. If you don't "burp" it, it will get hot and make a harmonic sound like a finger going around a wine glass.
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David Comando, 1987 Kindred Spirit, Hull# 55 sailing the waters of Eastern Long Island, and to other points in the Northeast.

WTunnessen

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Re: A question for those who installed a packless seal system
« Reply #10 on: June 22, 2022, 06:05:21 PM »

Mine is not vented and when I asked if it should be I was told by the yard it's not necessary on engines our size. I think I checked with PSS to confirm but don't recall 100%. You do need to burp them when you haul out and check the bellows periodically after a few years to make sure they are not dry and cracking.
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Gaulois #579 C34 Tall Rig - CYC West River, MD

wingman

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Re: A question for those who installed a packless seal system
« Reply #11 on: Yesterday at 04:05:33 AM »

Mine is not vented and when I asked if it should be I was told by the yard it's not necessary on engines our size. I think I checked with PSS to confirm but don't recall 100%. You do need to burp them when you haul out and check the bellows periodically after a few years to make sure they are not dry and cracking.

ours is vented to lazarette/locker behind wheel. We still have to burp after haul out so may be clogged?
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2000 MkII, wing keel, #1471
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