[Public-List] cutlass housing replacement

[George Dinwiddie]

In my experience, it’s easier to seal the threads than the tube to the hull. I suspect that if the threads weren’t sealed, my boat would have sunk before I noticed that the stern tube had rotated since I had replaced the hose clamps. (The clamp screws were somewhat inaccessible.)

George 

Sent from a primitive pocket computer. Please assume all errors are due to that.

> On Jan 21, 2021, at 18:47, Clay Pass via Public-List <public-list at lists.alberg30.org> wrote:
> 
> I thought in prior discussions we had agreed that water within (inside) the
> stern tube was captured by the stuffing box/packing nut on the other end
> from entering the boat.  Water that leaks through the threads at the
> cutlass housing to the outside of the tube will be stopped from entering
> the boat by the complete seal of the stern tube to the hull (outside of the
> tube to thru hole in hull) and also the seal of the cutlass bearing housing
> to the hull.  In any case, I had a housing scored just like this and had no
> issues with it after caulking the whole interface with 3M 4000 and I
> believe I caulked the threads with the same just for good measure.  As long
> as you can screw the housing on the stern tube without it turning or
> breaking the seal and also use plenty of caulk to seal the
> housing/hull/stern tube interface, you should not have any issues.  I
> haven't had any with mine.
> 
> Clay
> #449 Seeing Deep
> 
> On Sun, Jan 17, 2021 at 1:36 PM Greg Wallis via Public-List <
> public-list at lists.alberg30.org> wrote:
> 
>> Hi,
>> 
>> I am in process of replacing the cutlass bearing,
>> 
>> Here's a link to my poor cutlass bearing housing.  Notice the ruined pipe
>> threads.
>> https://drive.google.com/file/d/198AJ_rMD7Lx8QrdksGXhIbeRR6_FPS9t/view
>> 
>> I took the cutlass bearing housing to a shop to have the new bearing
>> pressed in, and they proceeded to overcut the old bearing and cut two deep
>> groves lengthwise through the female pipe threads of the cutlass housing.
>> These threads connect the cutlass bearing housing to the stern tube.  So
>> now the threads are not going to be watertight.  I think that the threads
>> will still function, but they will most certainly leak.
>> 
>> I am hoping somebody has an identical alberg30 cutlass bearing housing that
>> they'd be willing to sell to me.  This would be the best.
>> 
>> If I can't find another one, I am considering to allow this fitting to leak
>> between the stern tube and the cutlass bearing housing.  I think I'd just
>> need to ensure that there is plenty of sealant around the outside of stern
>> tube where it exits the hull.  I guess some water would accumulate in that
>> space and wouldn't really have anywhere to go.
>> 
>> I would also put a generous layer of sealant on the threads themselves, to
>> hopefully prevent it from leaking at all.   Doing this is going to make it
>> very difficult to remove the cutlass bearing housing in the future.
>> 
>> If you have any suggestions or tricks to make these threads watertight
>> again, please do let me know.  How about a thread sealant that would solve
>> this problem and still be possible to unscrew in the future?
>> 
>> Ideally though, if you have a cutlass bearing housing you'd be willing to
>> part with, please let me know!
>> 
>> Thanks
>> Greg
>> hull #165
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