[Public-List] Cracked Stern Tube - Laugh or Cry?

[Gordon Laco]

Understood… but it’s quite secure…


Gordon Laco
www.gordonlaco.com




> On Sep 19, 2018, at 12:56 PM, Hernán Scarnichia <hernanscar at gmail.com> wrote:
> 
> Gord, 
> yes that would have been another way to fix it. 
> probably easier.
> at that time I didn't trust that a bolt threaded on epoxy could withstand any shaft vibration.
> 
> On Tue, Sep 18, 2018 at 10:29 PM Gordon Laco via Public-List <public-list at lists.alberg30.org <mailto:public-list at lists.alberg30.org>> wrote:
> Hello Hernan
> 
> Those bolts are normally threaded in as you describe.   They cannot be bolts through.  You can restore their integrity if you need to by filling the loose bolts hole with thickened epoxy, then redrilling and tapping new threads.  
> 
> Gord
> 426 Surprise 
> 
> Sent from my iPhone
> 
> > On Sep 18, 2018, at 10:35 PM, George Dinwiddie via Public-List <public-list at lists.alberg30.org <mailto:public-list at lists.alberg30.org>> wrote:
> > 
> > Hernán,
> > 
> > How did a fiberglass shaft log change the bolts of the cutless bearing housing?
> > 
> > - George
> > 
> >> On 9/18/18 1:30 PM, Hernán Scarnichia via Public-List wrote:
> >> The problem on my boat (#414) was that the two bolts holding the cutlass
> >> bearing housing were not through bolted, just threaded into the fiberglass,
> >> these were not lag bolts with a coarse thread either, just regular thread
> >> bolts threaded straight to the fiberglass. The shaft vibrations loosened
> >> them and one bolt was already gone when I hauled out.
> >> I suppose that if I had realized earlier that the engine was misaligned,
> >> and the shaft vibrating, it could all have been prevented.
> >> Either way I did not like the fact that all that was keeping the water out
> >> was those two bolts and a wad of caulk so I scrapped the whole thing and
> >> installed a fiberglass shaft log.
> >> On Mon, Sep 17, 2018 at 1:58 PM George Dinwiddie via Public-List <
> >> public-list at lists.alberg30.org <mailto:public-list at lists.alberg30.org>> wrote:
> >>> On 9/17/18 5:36 PM, Jonathan Bresler via Public-List wrote:
> >>>> Remember hearing form various sources that cutlass bearings and the rest
> >>>> are tricky
> >>>> "cause the stern tube might turn or twist and break its bond to the
> >>>> deadwood".
> >>>> Seems that won't be a problem in this Triton given the amount of epoxy
> >>>> applied.
> >>> 
> >>> This was my fear, and the reason I pulled and rebedded the stern tube
> >>> when I noticed that it had turned. The hose clamp screws were no longer
> >>> pointed up where a screwdriver could reach them.
> >>> 
> >>> It turned out that this is an unnecessary worry. The water is contained
> >>> by the cutless bearing housing (and bolts), and the stuffing box. The
> >>> caulking of the stern tube itself is not critical.
> >>> 
> >>>   - George
> >>> 
> >>> --
> >>>   ----------------------------------------------------------------------
> >>>    When I remember bygone days                         George Dinwiddie
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> >>>    So many I loved were not yet dead,           http://www.Alberg30.org <http://www.alberg30.org/>
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> >>>   ----------------------------------------------------------------------
> >>> 
> >>> 
> >>> 
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> > -- 
> > ----------------------------------------------------------------------
> >  When I remember bygone days                         George Dinwiddie
> >  I think how evening follows morn;            gdinwiddie at alberg30.org <mailto:gdinwiddie at alberg30.org>
> >  So many I loved were not yet dead,           http://www.Alberg30.org <http://www.alberg30.org/>
> >  So many I love were not yet born.                          also see:
> >               'The Middle' by Ogden Nash     http://idiacomputing.com <http://idiacomputing.com/>
> > ----------------------------------------------------------------------
> > 
> > 
> > 
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