[Public-List] Close tolerances for shaft and shaft log!

[John Birch]

Hi Jeffrey,

If you "fussed endlessly" ; ) aligning the shaft and the tube, presumably 
the shaft is in pretty good alignment with the engine.

The only concern might be how the stuffing box fits into the picture and 
it's impact.

A slower cure like the Sikkens LOT caulks might have been a better choice, 
but I would suggest you try it as it is and see if there really is an issue. 
Not sure why you pulled the shaft log in the first place - the gray 
Dolphinite last virtually forever and remains pliable. Dolfinite is still 
available by the way.

As the shaft is short, I wouldn't worry about it hitting the pipe, the boat 
would shake apart if it bent that much.

If you do elect to redo it, I would suggest using Dolphinite as it has been 
tried and true for decades and I haven't heard of any Albergs sinking 
because of a Dolphinite bond or aging failure.

You can always haul in the Fall, and if you are up anywhere North, you will 
anyway.

Best

John



----- Original Message ----- 
From: "Jeffrey" <fongemie at gmail.com>
To: "Alberg 30 Public List -- open to all" <public-list at lists.alberg30.org>
Sent: Thursday, May 27, 2010 7:35 AM
Subject: [Public-List] Close tolerances for shaft and shaft log!


> Hey everyone,
>
> What began as a simple cutlass bearing change grew into a drive system
> overhaul!
>
> I've got a new coupling, shaft and prop.
>
> see: 
> http://picasaweb.google.com/lh/photo/rBUX3ltoRI_YWDpiM4lFvQ?feat=directlink
>
>
> Quite a job getting the old caulking out to reinstall the shaft log.
> One thing that bothers me somewhat are the close tolerances between
> the shaft log and drive shaft. On my boat at least, the id of the tube
> is only 1 3/16". Not much clearance for a 7/8 shaft! In reinstalling
> the shaft log, I fussed endlessly to get the alignment perfect, only
> to find the shaft slightly off center once the 4200 sealant had cured.
> I'm about a 16th off.
>
> See: 
> http://picasaweb.google.com/lh/photo/pfwCm_WcyK5tlVhWRz_7ZA?feat=directlink
>
> At this point, the sealant has cured & I need to decide if I'm close
> enough. One thing I was thinking I could do to try to correct the
> alignment would be back the two bolts outside the boat, using an old
> chisel slightly crack an edge of the outside stern tube, stuff a
> sliver of bronze under one side to re-align the tube and smear some
> more 4200 into the crack before tightening down the bolts.
>
> Or I might just leave it.
>
> Jeff Fongemie
> #116 Seagrass
>
> http://picasaweb.google.com/fongemie
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