macd
Well-Known Member
Quite so. The image depicts a hard plastic adaptor intended for linking hoses of different sizes. Can be very useful, but absolutely not for the job scambledegg has in mind.
hole in the bottom of my boat, can't plug it
- Thread starter scrambledegg
- Start date
Quite so. The image depicts a hard plastic adaptor intended for linking hoses of different sizes. Can be very useful, but absolutely not for the job scambledegg has in mind.
scrambledegg
Well-Known Member
Good suggestion. The question is on its way to them.
penberth3
Well-Known Member
So how about a metal sleeve to do the same job?
vyv_cox
Well-Known Member
It's how to attach it that is the problem. Elastomeric materials have many benefits, although you have to be careful not to over-tighten.
scrambledegg
Well-Known Member
Not sure why it would be such a bad idea. Would you explain?
If it can be bonded to the stern tube and is strong and rigid enough to take a bit of compression from jubilee clip attaching the seal to it?
scottie
Well-Known Member
Volvo part numbers s tamped on the part are misleading when they put it in a box with the clamp and other bits it takes a new number
penberth3
Well-Known Member
I was thinking the seal was to go inside the existing stern tube. So no need for a Jubilee clip. If I've got this right, OP's problem was the difference in outside diameter between the outside of the seal and the inside of the tube.
scrambledegg
Well-Known Member
The other way round actually. The stern tube has to fit inside the wide end of the seal. in my case the stern tube is too wide o.d. to do that ( and there's a lip around the end of it to make matters worse).
macd
Well-Known Member
Er, you're addressing the OP.
macd
Well-Known Member
To me it has the hallmarks of a bodge*, and in a critical application. But it might work and it's your boat.
* by which I mean something not intended for the purpose. The meaning's have come to be blurred over the years, but to me it's distinct from a botch.
pete
Well-Known Member
Probably doesn't apply in your case, when I used a vernier to measure my stern tube just aft of the seal it was a odd size but when I removed the seal there was a step down on the stern tube that the seal fitted to and that was a standard size.
Pete
Pete
scrambledegg
Well-Known Member
Thank you all, I really appreciate all the contributions so far.
It looks like I shall have to purchase a new seal that will fit my combination of shaft and stern tube diameters (and dispose of the Radice RMTA seal I already bought :ambivalence:
I still hold out a faint hope I can find an adapter, to do this below (the red shaded part), sliding over the outside of the stern tube, or, perhaps fitting inside it:
It looks like I shall have to purchase a new seal that will fit my combination of shaft and stern tube diameters (and dispose of the Radice RMTA seal I already bought :ambivalence:
I still hold out a faint hope I can find an adapter, to do this below (the red shaded part), sliding over the outside of the stern tube, or, perhaps fitting inside it:
rogerthebodger
Well-Known Member
What is the inside diameter of your stern tube?
1 1/4 " schedule tube has an O/D of just over 42 mm and it the inside dia of your stern tube is about the same you could get a 1 1/4 BSP nipple of short length of stainless tube that would fit inside you stern tube sealed and held in with grub screws through the stern tube.
Some thing this this may do the job
http://www.dhstainless.co.uk/hygienic/concentric-reducer
https://www.ebay.co.uk/b/Stainless-Steel-Weld-Reducer-Plumbing-Pipe-Fittings/63900/bn_40557916
https://www.google.co.za/search?tbm...VJJcAKHVSVDfsQ4lYILigH&biw=1920&bih=949&dpr=1
Last edited by a moderator:
ithet
Well-Known Member
I have fitted a Volvo 1" seal onto a 1-7/8 stern tube. It was a slight stretch and the lip on the tube was removed with some emery cloth. This was on my Moody and I know others have fitted one also. I expect your original Volvo seal was no different dimensions to a new one.
scrambledegg
Well-Known Member
scrambledegg
Well-Known Member
Very encouraging. I did try to sand down the lip on the stern tube - it takes the diameter out to almost 52 mm. You have inspired me to try harder. The physical contortion needed to apply effort on it is the main obstacle.
Pete7
Well-Known Member
Had to do the same with our Moody stern tube. Dremel made light work of the task and the 1-3/4 seal slid on. Well the first one did, the second one with the same part number put up a bit of resistance but it went on eventually.
https://www.volvopentashop.com/Volspec/en-GB/Details/AccessoriesCatalog/3891?path=1532/3667/3891
There is also a version with a water feed from the likes of ASAP supplies which I bought by mistake. I have it as a spare on board with a bolt in the threaded hole.
jav301
Well-Known Member
I have been wrestling with the same problem, pity I didn't notice this thread. I really wanted a burpless lip seal such as the Radice but my stern tube is 47mm OD with a 25mm shaft. Boat is a Konsort. As I was replacing a face seal that I didn't trust I ruled out a PSS or Deep sea seal -both of which would fit and I couldn't find a lip seal that would. I decided in the end to go for a conventional stuffing box on a flexible mounting. A bit more expensive than the alternatives but hopefully reliable and long lasting. I'm going to try some super scientific Gore tex gland packing (GFO) which claims that it will allow a stffing box to run dripless.
scrambledegg
Well-Known Member
I am pleased to report that I have succeeded in making my Radice seal (intended for 43mm o.d. stern tube) fit to my stern tube, actual o.d. 48mm, by taking a Dremel tool and removing the raised lip around the inboard end of the stern tube. I also created a chamfer on the end of the tube to help get the seal started over the end of the tube, which helped a lot.
So, Ithet's and Pete7's suggestions worked in combination and they win the virtual bottle of beer ( or an actual beer if we should ever meet).
So, Ithet's and Pete7's suggestions worked in combination and they win the virtual bottle of beer ( or an actual beer if we should ever meet).