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stern gland


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mine was leaking a bit when i got my first keeler

 

bit like this

 

https://www.youtube.com/watch?v=YTQ997vAq08

 

mainly researched with google

 

http://www.pbo.co.uk/expert-advice/expert-answers/how-to-repack-a-stern-gland-step-by-step-1031

 

but was able to stop the leak by gathering the right tools and extensions

 

to crack the lock-nut

 

pump it full of grease

 

and tighten by 1/4? of a turn before locking with nut again

 

sg1.jpg

 

stern gland dia.JPG

 

 

 

 

 

 

 

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Did mine a few years back. Not sure how often they need doing. Not sure if it's best to do on the hard (we were). Not even sure if it is possible to do while in the water. Not a difficut job... A little fiddly. Where are you currently?

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Did mine a few years back. Not sure how often they need doing. Not sure if it's best to do on the hard (we were). Not even sure if it is possible to do while in the water. Not a difficut job... A little fiddly. Where are you currently?

 

Am in auckland, westhaven

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This can be done on the water though water will come in. I was advised to do it every 12 months. Its important to get the right size packing and right number of wraps, a sharp stanley knife and appropriate grease.

To get old packing out I screwed a screw into the packing then pulled it out with pliers.

Auckland Engineering Supplies in Beaumont Street were good for packing and grease.

To repack I put a snug wrap of packing around the shaft then cut it where it met, greased it up then pushed it in with a screwdriver all the way around the shaft. Once all wraps were done in this way the drip should be back to normal once the gland is back together. A thread file was also handy at this time to clean up the thread. I also found it was handy to be able to tighten the gland completely so there was no drip when I wasn't using the boat. Good luck

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Yes. The packing is cut into three x 360 degree pieces each fitting around the shaft. The three joints are offset 120 degrees from the previous piece. We didn't grease the packing but don't see any reason why not. I'm sure you get a few years out of it.

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once repacked and not dripping,go for a motor and back off gland till you get a drop or 2 every minute,keeps it cool and when stopped should not drip      200mm is all you need for dripless seal,i got one this year of chatfield marine $600 fitted in hr,best to do out of water though.

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Last boat had a difficult to repack gland due to a re-engine by the PO and always dripped a too much. I was able to source a product I think called "Dripless Stuffing". Once used never touched the gland for six years and then sold the  boat. A cheap alternative that worked for me 100%.

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Drip-Less Packing

 

An alternative to conventional braided packing is Drip-Less moldable packing. The advantage of this type of packing is that it is self lubricating, which eliminates the necessity of letting the stuffing box drip. Drip-Less packing requires two retainer rings of conventional packing. You install a ring of conventional packing, then push Dripless Packing into the box until it is about three-quarters full. A second ring of conventional packing completes the job. Tighten the nut just enough to stop the box from dripping. This type of packing runs hotter than water-lubricated flax, and over tightening will generate excessive heat. The stuffing box should not be too hot to touch. Low-friction packing is six to ten times more expensive than flax, but because it rarely needs adjustment, it can be a good choice for a stuffing box that is particularly difficult to service.

 

http://www.boatus.com/boattech/casey/stuffing-box.asp

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We have a very simple dripless seal which would be very little longer than a standard gland. It never leaks, has done thousands of hours and needs very little or no maintenance. It consists of a simple oil seal mounted in a free floating white plastic bush (looks like nylon or something similar to the sheave material in some blocks)  with the oil seal spring replaced by a neoprene rubber o-ring. The plastic bush has a short length of rubber hose clamped to it and the stuffing box. There is a small (10mm) cooling hose from the saltwater cooling pump to cool the seal and a stainless grease nipple which gets a very occasional shot of grease. I have replaced the lip seal twice in 12  years but only as a precaution - it has never leaked one drop so we have totally dry bilges. Not sure who made this particular seal (came with the boat) but it does not look like a very expensive piece of kit to make. Having used the old packing type seals on other boats there is no way I would change back. 

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Chewing Gum, you have precisely described the shaft seal in my boat. Until I read your post I had assumed that my seal was a home made job. Also, like you, I have replaced the oil seal(?) once in five years, just as a precaution. Mine has never leasked a drop, either. There are no identifying marks on the shaft seal, and I would be interested to know its origins.

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I'm pretty sure they are an earlier model Kiwi shaft seal ours is 7 years old and it is working fine not a drop of water comes in. The new ones are stainless and it looks like they've dropped the grease nipple.

 

 http://www.kiwishaftseal.com/afa.asp?idWebPage=56814&CATID=10&ID=144&SID=116944999

 

I keep intending to ring them and check but I keep forgetting to, maybe posting this will jog my memory on Monday.

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