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Old 17-07-2016, 11:41   #1
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Is this a drip less stuffing bearing?

I've been lurking on this site a while and learning heaps. Headed east now on Lake Ontario to 1000 islands and would like some assurance about this stuffing bearing.

I can't see any branding on it, but originally when I purchased the boat 2 years ago a 1/6th tighten stopped it leaking.

So why does it end up dripping after 10+ hours of engine running?

I tighten it 1/6th turn (should I be continuously tightening it?) And it stops dripping - for a while.

Last instance we picked up some weed on our prop and it took me 2 hours to notice it (slight vibration), now it's dripping even when at rest.

If this is normal, so be it. But should I just accept continuous dripping? Or should I be ready to replace on haulout this fall?
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Old 17-07-2016, 11:51   #2
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Re: Is this a drip less stuffing bearing?

Appears to me to be an adjustable, packing gland style but a bit different than the ones I'm used to.

First plastic (nylon?) instead of bronze and no lock nut to release the adjusting nut but instead a long cotter pin to stop the adjusting nut from rotating.

This kind of stuffing box MUST drip a little or you will ruin the prop shaft. Tighten so you get an occasional drip when not running and a drip every few seconds when runing.
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Old 17-07-2016, 11:52   #3
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Re: Is this a drip less stuffing bearing?

That is a normal stuffing box, though I have not seen a plastic one before. It should drip a little when your shaft is turning but not when you are stopped.
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Old 17-07-2016, 11:59   #4
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Re: Is this a drip less stuffing bearing?

Thank you for quick response. I think I'll relax about the drips for now. Will look at replacement this fall on haulout.
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Old 17-07-2016, 12:23   #5
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Re: Is this a drip less stuffing bearing?

What make boat do you have? I knew about plastic stuffing boxes but this the first I've seen they are called "weeping seals" the water lubricates the packing and it stays cooler. Looks good! No corrosion!

Oops my bad you have a hunter
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Old 17-07-2016, 12:54   #6
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Re: Is this a drip less stuffing bearing?

A little dripping when sitting still hurts nothing, mine usually drips some, I'd rather it drip a little than not and get hot.


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Old 18-07-2016, 08:06   #7
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Re: Is this a drip less stuffing bearing?

I haven't seen one of those in a very long time. It is a conventional stuffing box that was made by Danforth. As i recall there were holes in the hex nuts you were supposed to safety wire them together to prevent turning.
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Old 18-07-2016, 08:27   #8
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Re: Is this a drip less stuffing bearing?

I've seen those on Hunters, factory issue I thought, not drip-less.
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Old 18-07-2016, 10:35   #9
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Re: Is this a drip less stuffing bearing?

If it does not drip you will have bigger problems.
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Old 18-07-2016, 11:34   #10
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Re: Is this a drip less stuffing bearing?

IF you want to try drip less because it looks like it would be an easy retrofit. contact PYI at
Address: 12532 Beverly Park Rd, Lynnwood, WA 98087, United States
Phone: +1 425-355-3669.

(IF you have a 2000 series Volvo is is good insurance to fit a 'suredrive' before the splined shaft on the transmission fails?
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Old 18-07-2016, 15:56   #11
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Re: Is this a drip less stuffing bearing?

Quote:
Originally Posted by coastalexplorer View Post
(IF you have a 2000 series Volvo is is good insurance to fit a 'suredrive' before the splined shaft on the transmission fails?

Can you elaborate?
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Old 18-07-2016, 17:01   #12
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Re: Is this a drip less stuffing bearing?

Not sure what the relevance is to the OP, but this is a known problem with the 2000 series Volvos. There was originally no kind of damper plate in the transmission, and the splines on the transmission input shaft would wear and eventually strip out. Volvo modified the design, I think in the late '80's, to address this. I found all this out when the transmission on my boat failed (after 30 years). Volvo also supplies a retrofit kit to upgrade to the improved design, which might be a better choice than a drivesaver.
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Old 18-07-2016, 19:22   #13
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Re: Is this a drip less stuffing bearing?

Quote:
Originally Posted by sandy stone View Post
Not sure what the relevance is to the OP, but this is a known problem with the 2000 series Volvos. There was originally no kind of damper plate in the transmission, and the splines on the transmission input shaft would wear and eventually strip out. Volvo modified the design, I think in the late '80's, to address this. I found all this out when the transmission on my boat failed (after 30 years). Volvo also supplies a retrofit kit to upgrade to the improved design, which might be a better choice than a drivesaver.
Thanks
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Old 18-07-2016, 22:06   #14
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Re: Is this a drip less stuffing bearing?

Sandy stone is correct, I do not know if the line at the bottom of my post is relevant to the OP but it should be relevant to a lot of other people who are still running 2000 series Volvo Penta diesels.

I agree that while Volvo did not want to take full responsibility for what many would consider a design error. They did produce the modifications mentioned. It did nothing for the splined shaft without changing the gear set in the transmission. Thus it is easy to see that it is possible to renew the system for $3416.66 in parts; plus skilled labour to rebuild the gear box. spiral bevel gears are made in sets within the same cutter sharpening cycle, so they are not interchangeable.

Two Companies in England started offering a service to grind the damaged shaft to a hexagon and made a corresponding damper plate. for this the boat owner had to disassemble his gear box and ship the parts away to have the work done. then wait for the return of the parts.

I bought a 2003 engine and spent a lot of money restoring it before I learned about this problem. So I was motivated to find a better solution. Next Wave Marine systems on Vancouver's Island. Canada.
normally make drives for commercial craft. I asked for help and they have developed a miniature version for the 2000 series Volvo that can be shipped to the boat owner anywhere in the world and installed the same day using simple tools. NO Machining required.

you can watch the short video of my engine using this link: https://www.dropbox.com/s/eixuwb7c85...drive.mp4?dl=0

Or get the full story from their web site. I have no business relationship with them I am Just trying to get the information out there to those who could make use of it. prevention is better than cure.
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Old 19-07-2016, 16:51   #15
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Re: Is this a drip less stuffing bearing?

We love our drip less but they too occasionally spit water as the graphite seal wears so we put down a paper towel to catch the drips.

A dry bilge is what I prefer...solves a lot of issues.

Norm
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