[Public-List] Stern tube

[Don Campbell via Public-List]

Hi Greg:
    You have yourself quite a job. The only way to seal that tube well is to 
remove all of the dolfinite that was the seal and that means getting in to 
the back of the shaft area and scraping all you can of it out, Then you 
could take a wire brush on a drill to rough it up and get more out, and then 
it is the solvents. Be careful of inhaling whatever you use. use extra 
ventilation. Once it is clean as a whistle, you can reinstall the tube and 
the bracket on the exterior that holds the bearing. I used most of a tube of 
5200 to seal things because I did not want to have to go through the process 
again and I put some on the join and then let it start to harden before 
adding more. The toughest part is under the tube, but access and care will 
suffice. That was about 10 years ago now and I still have a dry seal between 
the tube and the water outside. IT IS A BIG CHORE TO DO IT WELL.  Any 
dolfinite in the way means you will have a leak.  I also had the motor out 
at the time so had better access., but for me to take out the motor and get 
it back in is about a 3 1/2 hour job, which is not bad in the scheme of 
things.
    My feeling is that you will have a constant leak here unless you get a 
good seal and the only way to do that is to have things really clean.
Don

-----Original Message----- 
From: Greg Bover via Public-List
Sent: Saturday, June 11, 2016 7:00 PM
To: List A-30
Subject: [Public-List] Stern tube

Test fired the Yanmar this morning prior to next weeks scheduled launch when 
I put it in gear by mistake it rumbled and rattled unusually. I found the 
shaft to be loose in the cutless bearing. Three hours later after making a 
prop puller I got the bearing out but when I tried to unscrew it from the 
stern tube the tube came part way out with it. What do I need to do to seal 
it when it goes back together?
Also all the cutless bearings of the right od and id seem to be 3 1/2" long 
whereas mine is just over 2". Does one just cut to length?
Thanks to George for the good info on the website. And thanks to all you all 
for your advice.
Greg Bover
#114 Pensive Flyer
Gloucester

Sent from my iPhone
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