Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 16-12-2007, 10:34   #16
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Quote:
Originally Posted by Stranded Mariner View Post
I am planning to install a dripless seal on my new boat. Any brand names you could recommend? Thanks
This is the most common and EZ to get at most suppliers.

PYI Inc. Max-Prop PSS Shaft Seal Seaview Radar Mounts R&D

BTW - FYI one NEVER uses a lubricant on the shaft or seals other then a liquid dish soap.
Attached Thumbnails
Click image for larger version

Name:	PSS.JPG
Views:	319
Size:	89.5 KB
ID:	2240  
__________________

__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 16-12-2007, 10:54   #17
Senior Cruiser

Cruisers Forum Supporter

Join Date: Feb 2003
Location: Macatawa Michigan
Boat: Amanda Faye 61' Custom Irwin aftcockpit ketch
Posts: 1,414
Images: 106
That looks like mine.
__________________

__________________
Gunner
irwinsailor is offline   Reply With Quote
Old 16-12-2007, 16:51   #18
Registered User
 
Stranded Mariner's Avatar

Join Date: Sep 2007
Location: Shanghai, China
Boat: Dix 43 CC, steel, 43 ft
Posts: 149
Send a message via Skype™ to Stranded Mariner
Quote:
Originally Posted by delmarrey View Post
This is the most common and EZ to get at most suppliers.

PYI Inc. Max-Prop PSS Shaft Seal Seaview Radar Mounts R&D

BTW - FYI one NEVER uses a lubricant on the shaft or seals other then a liquid dish soap.
Thanks for that! I will check it out.
__________________
'How inappropriate to call this planet Earth when it is quite clearly Ocean.' - Sir Arthur C. Clarke
Stranded Mariner is offline   Reply With Quote
Old 16-12-2007, 18:15   #19
Registered User

Join Date: Jan 2006
Location: North Carolina
Boat: 44 footer
Posts: 923
I've been fooling around with an idea that you guys might get a kick out of.

Glass in a short wall in the bilge under the shaft log, and make a "sump." A flax packing drips, and so long as the drip is contained... and doesn't make it to the real bilge, putting a tiny bilge pump in the sump would attain the same "Dusty bilge" at relatively little cost.
__________________
Zach is offline   Reply With Quote
Old 16-12-2007, 18:56   #20
Registered User

Join Date: Oct 2007
Posts: 217
I want to second the comment of the fellow above who observed that when these seals fail, they can do so severely. There was a recent writeup (last couple of months) where a skipper almost lost his boat because of this, and I have heard of at least 3 other instances where competent sailors ended up removing them and going back to the old stuffing box type. If I remember correctly, original alignment and setup are CRITICAL, as are maintenance of those original settings.This can be hard to do where engines are NOT bolted securely to the floors etc.
__________________
Seeratlas is offline   Reply With Quote
Old 16-12-2007, 19:10   #21
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Quote:
Originally Posted by Seeratlas View Post
IIf I remember correctly, original alignment and setup are CRITICAL, as are maintenance of those original settings.This can be hard to do where engines are NOT bolted securely to the floors etc.
And that's the key! Boats are like airplanes in that they go out into a space that is un-populated where maintenance and professionalism is important.

Any motor not properly bolted down with the proper sized mounts should not even leave the dock except to get to the yard for repairs!
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 16-12-2007, 20:36   #22
Registered User

Join Date: Sep 2007
Location: Colombo
Posts: 1,059
Regarding the comments about the flooding risk from failure of "dripless" type seals, this risk does not generally apply to those that use lip seals. A lip seal cannot fail catastrophically.

In our own case we have a lip seal based shaft seal which has a metal bearing behind it on the water side. With the boat in the water the lip seal can even be removed out of its housing and the water that comes into the boat with the shaft stationary is only that which can get past the clearance bearing, so just a dribble. Furthermore it is partly grease lubed and if the grease is pressed up the lip seal can be removed and there is no leakage at all with the shaft stationary and only a dribble with the shaft running.

Not much point me mentioning the particular make as it is not available internationally, but I would be sure that there are other manufacturers who make similar lip seal based shaft seals (but I have not looked).
__________________
MidLandOne is offline   Reply With Quote
Old 16-12-2007, 20:51   #23
Registered User
 
RaptorDance's Avatar

Join Date: May 2006
Location: On Board - Currently - Heading back to SF Bay from Mexico.
Boat: Valiant 50 - Raptor Dance
Posts: 196
Images: 2
Send a message via Skype™ to RaptorDance
I've been with a lot of folks with these shaft seals.

The few failures have been due to improper installation.

The coupling is held in place with set screws. Each screw is designed to be backed up with a second screw to insure that the first one is locked into place.

In every case of failure that I've seen, the second, locking screw was omitted... Eventually the first screws loosened and .....

Blue Loctite can be used for even further security.
__________________
SV Raptor Dance - Valiant 50 #107
Bill Finkelstein & Mary Mack
http://raptordance.com
RaptorDance is offline   Reply With Quote
Old 17-12-2007, 06:08   #24
Registered User

Join Date: Oct 2007
Posts: 217
Ok, lets make this easy.
Google-
"dripless seal failure boat"

seer



Quote:
Originally Posted by RaptorDance View Post
I've been with a lot of folks with these shaft seals.

The few failures have been due to improper installation.

The coupling is held in place with set screws. Each screw is designed to be backed up with a second screw to insure that the first one is locked into place.

In every case of failure that I've seen, the second, locking screw was omitted... Eventually the first screws loosened and .....

Blue Loctite can be used for even further security.
__________________
Seeratlas is offline   Reply With Quote
Old 17-12-2007, 08:32   #25
Registered User
 
blahman's Avatar

Join Date: Jun 2006
Location: Charlotte Harbor, FL
Boat: Westsail 32
Posts: 301
Images: 50
Quote:
Originally Posted by Zach View Post
Glass in a short wall in the bilge under the shaft log, and make a "sump." A flax packing drips, and so long as the drip is contained... and doesn't make it to the real bilge, putting a tiny bilge pump in the sump would attain the same "Dusty bilge" at relatively little cost.
I've been planning to do something similar to this for a while. I have a full keel and an especially low sump section in my bilge. After I install my dripless seal and get the boat dry, I'm going to mount a bucket with a bilge pump in the bottom of it down in my bilge sump. I'll have a hose from my chain locker and icebox running into it, so theoretically I'll have a dry bilge.

On the note!

Is it possible to install a dripless PSS while the boat is in the water? I don't need to for another six months but would love to stop the water coming in and get my bilge sparkly.

Thanks for your time!
Aaron N.
__________________
"Only those who see the invisible can do the impossible."

W32 #482 Asia Marie


blahman is offline   Reply With Quote
Old 17-12-2007, 09:43   #26
Senior Cruiser
 
senormechanico's Avatar

Cruisers Forum Supporter

Join Date: Aug 2003
Boat: Dragonfly 1000 trimaran
Posts: 5,823
Is it possible to install a dripless PSS while the boat is in the water? I don't need to for another six months but would love to stop the water coming in and get my bilge sparkly.

Thanks for your time!
Aaron N.



I did it on a LN35, but I suppose it would depend on your bilge's accessibility and the amount you can slide the shaft away from the transmission. You need to get the old parts off and the new parts over the shaft all the while water is coming in. It could get nerve wracking, and there's no going back once you start!

Steve B.
__________________
senormechanico is offline   Reply With Quote
Old 17-12-2007, 11:15   #27
Registered User

Join Date: Apr 2006
Location: Galveston
Boat: C&C 27
Posts: 724
The PSS on my C&C has worked flawlessly for four years now. Before the purchase I searched for examples of failures and made a call on a couple of different boards searching for any individual who had personally experienced a failure on their own boat. One person replied that he had problems with his that caused some minor flooding. (It scared the crap out of him at the time.) Almost evey one I know has converted to a PSS and repor they are pleased with it.

Certainly these, like all boat components will fail. Like Del mentioned, the installation is key. The one person I exchanged emails with installed his on an existing, and worn, shaft. His problem occured when the rotor slid up the shaft allowing water to pass the seal. It was fixed when he slid the rotor back onto the flange and tightened it back down. Despite doing most of the work on my boat myself this is one part I had replaced by the yard. At the same time I had the shaft and the prop replaced. (The previous owner had neglected the stuffing box and it failed after a day of sailing.)

The unknown threat may come when these have been in the marketplace long enough for people to "forget" about them. I check mine every time I start the engine, but that is easy on a small boat. Larger boats with deeper bilges may create an "out of site, out of mind" attitude.

pv
__________________
Pura Vida is offline   Reply With Quote
Old 17-12-2007, 15:16   #28
Registered User
 
Sailorguy's Avatar

Join Date: Oct 2007
Location: Melbourne, Florida
Boat: Southern Cross 39 - sv Kristali
Posts: 51
We have had excellent service from a dripless lip seal made by Tides Marine; over 7k sea miles w/ no problems. They wear at some point and need to be serviced by replacing the seal; a spare is carried ready to go forward of the one in use on the shaft. Replacement is easily made in the water. Before this we used a PYI brand seal w/ excellent results. The lipseal has a water injection port which takes some of the returned cooling water">engine cooling water and routes it by the seal and out through the cutlass bearing for the purpose of lubricating and cooling the seal;a side benefit is added lubrication of the cutlass bearing (added life span). With water injection it is especially critical to make sure the vented loop on the cooling water return loop is sufficiently elevated and functioning or water siphoning can occur and back up into the engine via the exhaust.

Steve
__________________
Sailorguy is offline   Reply With Quote
Old 17-12-2007, 17:13   #29
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Quote:
Originally Posted by Sailorguy View Post
. With water injection it is especially critical to make sure the vented loop on the cooling water return loop is sufficiently elevated and functioning or water siphoning can occur and back up into the engine via the exhaust.
I T'd mine right into the existing loupe for the exhaust cooler line just out of sight at the top of the picture.
Attached Thumbnails
Click image for larger version

Name:	motoraft.JPG
Views:	250
Size:	100.8 KB
ID:	2271   Click image for larger version

Name:	PSScoupler.JPG
Views:	252
Size:	112.5 KB
ID:	2272  

__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 17-12-2007, 17:59   #30
Registered User

Join Date: Oct 2007
Posts: 217
That's a nice installation Del

seer
__________________

__________________
Seeratlas is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Need recommend for dripless shaft bcguy Propellers & Drive Systems 8 07-08-2007 15:46
Shaft Seal ?'S westykids Propellers & Drive Systems 14 26-03-2007 20:40
LASDROP Shaft Seal Problem markpj23 Propellers & Drive Systems 9 12-12-2006 19:36
Prop shaft seal JGI417 Propellers & Drive Systems 11 18-11-2006 00:38
Lasdrop shaft seal By Invitation General Sailing Forum 4 30-01-2006 19:44



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 17:54.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.