Dripless Shaft Seal versus Stuffing Box - Page 6 - SailNet Community
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post #51 of 62 Old 12-19-2012
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Re: Dripless Shaft Seal versus Stuffing Box

mark--beneteaus are good--seems those with them ar ehappy--same with formosas--woul dlove a cuddle from ye, hombre guapo--
as for formosas with leaky stuffing boxes--yipes--seems to be a common problem with our boats---our modification was to cut a fender into strip of rubber, wrap the failing fitting with this mod and hose clamp it to the stuffing box. yes, it still pours water into boat, so isnt the needed fix....still looking. i have to pump out the bilge 2 times daily, until the boat has sat for 4 days, then only once daily... mine is also due to some engine mount problems, as well as good old "old age"....--seems mine are too soft, and require some manner of stiffening. that will be attended to in feb, first repair on my list. am searching for the most compatible haul yard in my way as i sail on to panama....huatulco seems like a decent idea , or acapulco, altho' i feel acapulco may just be a tad pricey....


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post #52 of 62 Old 12-19-2012
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Re: Dripless Shaft Seal versus Stuffing Box

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Originally Posted by casey1999 View Post
Main Sail,
I think your post offers some good insight of what is wrong with PSS. It is just to sensative. We are sailors, not astronauts that are highly educated and trained to go on Apllo missions to the moon.

I want equipment on my boat that can be abused, not installed perfectly, can be overused beyond is "designed" capability, can be beat on and ask for more.

I worked on subs and what impressed me is how basic and strong these things are made. They are made for an 18 year old out of high school with a little training to be able to make work.

PSS is just to sensative for the average sailor. And I want no little plastic fittings on my boat holding back the sea.
There's nothing "wrong" with the PSS shaft seal -- you just have to know how to use it --- like so many other things on a sailboat. I've had the PSS shaft seal on BR for over 10 years with no problems.

Sailors, like astronauts, have to do things the right way. The use of the set screws is one the things you have to get right if you use the PSS SS. It's not rocket science -- you just have to read and follow the directions.

I appreciate your desire for robust gear, but that said: if you want to abuse the gear on your boat, go ahead. If you want to install it incorrectly, that's your call. If you want to use it to failure, be my guest. But I wouldn't be surprised if you were one day the victim of multiple, minor but progressive component failures that leads ultimately to catastrophy.

MaineSailor knows of what he speaks. The only thing I didn't see in his excellent post was the mention of use of Loctite thread locker on the second (outer) of the two lock screws. You shouldn't use it on the inner set screw because some of it might leak between the shaft and the collar making the collar very difficult to remove. That's another common mistake made by the inexperienced 18 year olds that work in boat yards (you know, the ones that flunked out of sub school). But, you'd know that, if you read the directions.

PS -- I spent a few years in the Navy, and IMO the 18 year old on a Navy submarine is a highly trained individual regardless of his rate.

PPS -- one of the things that I do to alert me to any movement of either the rubber compression collar and the SS ring-around-the-shaft is to make marks with a black magic market on the stern tube where the rubber compression collar meets the stern tube and where the SS ring-around-the-shaft meets the shaft. If either of these marks disappears then I know something is moving and needs attention. I have a look at these marks every day during my pre-start checks of the engine space.

Last edited by billyruffn; 12-19-2012 at 09:35 PM.
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post #53 of 62 Old 12-20-2012
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Re: Dripless Shaft Seal versus Stuffing Box

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Originally Posted by zeehag View Post
mark--beneteaus are good--seems those with them ar ehappy--same with formosas--woul dlove a cuddle from ye, hombre guapo--
as for formosas with leaky stuffing boxes--yipes--seems to be a common problem with our boats---our modification was to cut a fender into strip of rubber, wrap the failing fitting with this mod and hose clamp it to the stuffing box. yes, it still pours water into boat, so isnt the needed fix....still looking. i have to pump out the bilge 2 times daily, until the boat has sat for 4 days, then only once daily... mine is also due to some engine mount problems, as well as good old "old age"....--seems mine are too soft, and require some manner of stiffening. that will be attended to in feb, first repair on my list. am searching for the most compatible haul yard in my way as i sail on to panama....huatulco seems like a decent idea , or acapulco, altho' i feel acapulco may just be a tad pricey....
sounds like a few of us....
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Last edited by Faster; 12-20-2012 at 02:21 PM.
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post #54 of 62 Old 12-26-2012
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Re: Dripless Shaft Seal versus Stuffing Box

2nd the comment on Submariners. I remember one of them lining me out on the process of becoming an officer on a nuclear sub.....the knowledge of all major systems on these ships.....we are in good hands.
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post #55 of 62 Old 12-27-2012
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Re: Dripless Shaft Seal versus Stuffing Box

miata paul--i wish there were a pill for my mounts..LOL


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post #56 of 62 Old 12-27-2012
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Re: Dripless Shaft Seal versus Stuffing Box

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miata paul--i wish there were a pill for my mounts..LOL
Well you are down in Mexico, so at least you don't need a prescription!
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post #57 of 62 Old 12-28-2012
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Re: Dripless Shaft Seal versus Stuffing Box

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Well you are down in Mexico, so at least you don't need a prescription!
true dat--and viagra/cialis etc are much less pricey than epoxy!!!!


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post #58 of 62 Old 12-29-2012
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Re: Dripless Shaft Seal versus Stuffing Box

Maine Sail...I tried "Like" your post several times but couldn't We have had a PSS Dripless for several years with no problems.

Some keys points MS and others have outlines for a proper install:
- use a shaft collar either from PSS or McMaster Carr
- only use your set screws once
- only use locktite on the second set screw, not the first
- follow the maintenance intervals
- read the install directions well

Cheers,
Shawn

S/V Windgeist
1982 Tartan 37C

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Last edited by T37Chef; 12-29-2012 at 10:44 AM.
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post #59 of 62 Old 12-29-2012
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Re: Dripless Shaft Seal versus Stuffing Box

For all of you stuck on the traditional packing box. A couple of notes. When packing is continually tightened over time the shaft will be grooved at this point. I have witnessed broken shafts that feel out of boats because of this. It does cause a little more than a drip I promise. Also have seen many log hoses replaced with exhaust/ water hose and rusty clamps that just fall off. No matter witch systems you use always check your shaft log before leaving your vessel will go a long way to piece of mind. When ever you leave a boat always check bilges and listen for running water Then and only then can you continue to lose sleep over her for every reason.


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post #60 of 62 Old 12-29-2012
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Re: Dripless Shaft Seal versus Stuffing Box

Regarding the lock-tite on the PSS set screws;
I installed my first PSS shaft seal last spring. ALL (6 - 2 spares) of the set screws had thread locking applied to the threads when I opened the box.
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