[Alberg30] Stern Tube Bonding

Mon Nov 18 11:10:33 PST 2002

I removed the "hard crap", the polyester around the stern tube, leaving only 
the cleaned up hole and surrounding hull. The Cutalss bearing casing is 
bolted to the outside of the keel and the stern tube isscrewed into it. The 
hull is several inches thick and with a liberal amount of 5200 built up 
around the tube and filling all of the voids, there is plenty of strength.

The shaft should exit through the stern tube "dead center". If you believe 
that the engine was properly aligned and you haven't made any adjustments to 
the engine, then you can use the engine flange to align the stern tube. What 
I did was to wrap tape around the shaft to take up the difference between 
the inside tube diameter and outside shaft diameter. This tape acted as a 
spacer that I removed after the 5200 had cured completely (about 2 weeks). 
This *tape* spacer was placed at a critical place on the shaft; where the 
shaft exited the tube on the forward end of the tube. The idea is 1. the 
shaft is held in proper position aft by the cutlass bearing (a new one) 2. 
forward by the engine flange. The tube is supported aft by the cutlass 
bearing housing and forward by the tape spacer around the shaft. Once dry, 
pull the shaft out, take off the tape, reinstall the shaft. This process 
does not work and should not be follwed if you have an mis-aligned engine.
Hope this helps. Easy to do...hard to explain.

Mike Lehman
"Gilleleje" #505

----Original Message Follows----
From: "Voyager Toronto" <voyagertoronto at hotmail.com>
Reply-To: Alberg 30 public list <public-list at alberg30.org>
To: public-list at alberg30.org
Subject: Re: [Alberg30] Stern Tube Bonding
Date: Mon, 18 Nov 2002 13:14:13 +0000

Alfredo, pictures would be great when you have them. To avoid hitting 
everyone with bitmaps, perhaps you could you send them to 
voyagertoronto at hotmail.com.

Question for Mike: so is all the "hard crap that Whitby used" all gone from 
yours, then, and is 5200 the only thing holding your tube in, other than the 
threading into the casing?

BTW, before coupling the shaft to the engine, is it necessary that the shaft 
be sitting dead centre of the stern tube? Although I haven't bonded in the 
tube yet (which might make a difference), I've mocked up the whole 
arrangement by bolting in the stern casing/stern tube and putting in the 
shaft just to see how it might look, and the forward end of the shaft 
emerges off-centre from the tube, though it doesn't touch. Is it legit to 
rely on the coupling eventually pulling it dead centre?

Regards & thanks. Calvin Voyager#30

>From: Alfredo <nj95gxe at yahoo.com>
>Reply-To: Alberg 30 public list <public-list at alberg30.org>
>To: public-list at alberg30.org
>Subject: Re: [Alberg30] Stern Tube Bonding
>Date: Fri, 15 Nov 2002 15:26:22 -0800 (PST)
>
>
>Calvin,
>
>I did the same job this past summer. 5200 is the stuff to get. About 3 
>tubes. Choose your own colors. Make sure to clean all of the old stuff out 
>first. Then put on the 5200 letting it dry a bit at the time. Otherwise the 
>outer layer will dry while the inner layer is still wet. The best tip I was 
>given was to have plenty of cleaning solvent to clean myself up after the 
>job. I took my time and did it over a weekend. The boat has been back in 
>the water and will stay there over the winter.
>
>This is a simple job anyone could do. Great way to become one with your 
>boat.
>
>GoodLuck
>
>Alfredo
>
>PS
>
>I got pictures if you would like to see them. But, you'll have to wait 
>'till Monday for me to scan them. let me know.
>
>
>Forwarded Message Date:Fri, 15 Nov 2002 12:09:02 -0500From:"Mike Lehman" 
><sail_505 at hotmail.com>To:public-list at alberg30.orgSubject:Re: [Alberg30] 
>Stern Tube Bonding
>
>
>
>Hi CalvinI did this job 2 years ago to "Danely" #257 and about 6 years ago 
>to "Gilleleje" #505 (my boat). 5200 was all that I used. I made sure ro use 
>a lot of it and it was well attached to both the tube and and the hull. It 
>has worked fine, better in fact than the old hard crap that Whitby used, 
>and more water tight. This is a real important part of the boat, and it is 
>hard to 'certify' the job without a first hand look at it, so use your own 
>judgement or seek a pro.Mike Lehman"Gilleleje" #505----Original Message 
>Follows----From: "Voyager Toronto" <voyagertoronto at hotmail.com>Reply-To: 
>Alberg 30 public list <public-list at alberg30.org>To: 
>public-list at alberg30.orgSubject: [Alberg30] Stern Tube BondingDate: Fri, 15 
>Nov 2002 16:43:43 +0000To replace the cutless bearing, I'd previously 
>removed both the stern casing and the bronze stern tube which threads into 
>it. Now I need to put the whole thing back, but I'm not sure how rigidly 
>the stern tube needs to be bonded in, and what to!
>  use. In addition to liberal amounts of 5200, which George recommended (I 
>presume with a view to watertightness?) should I be thinking to use 
>anything else to assure strength and/or rigidity? I'm thinking especially 
>about the area of the tube where it emerges into the hull. The grey-white, 
>rigid material which originally encapsulated the tube in this area, bonding 
>it to the hull, has cracked off from the less than genteel method I used to 
>remove the stern tube--hammering it backwards. Is 5200 enough of a 
>replacement here?Calvin,Voyager #30
>
>
>
>Licet & Alfredo
>
>"Free Spirit" #497
>
>
>
>---------------------------------
>Do you Yahoo!?
>Yahoo! Web Hosting - Let the expert host your site

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