[Alberg30] A4, stern tubes

[R.C. Alley]

Thanks, George; I'll send this on to AW.
----- Original Message ----- 
From: "George Dinwiddie" <gdinwiddie at min.net>
To: <public-list at alberg30.org>; <windham at chesapeake.net>
Sent: Sunday, May 20, 2001 8:53 PM
Subject: Re: [Alberg30] A4, stern tubes


> Rob,
> 
> RE: engines.  There's a few at 
> http://www.alberg30.org/collaborate/moin.cgi/Atomic4EnginesForSale
> and you can also check on the atomic 4 list at sailnet.
> 
> As for stuffing box hose (which is probably what Whitby used,
> originally) you can find that at
> http://www.southerncrownboatworks.com/catalog/cat/cat40.htm,
> something I recently learned on the atomic 4 list.
> 
>  - George
> 
> > "R.C. Alley" wrote:
> > 
> > 1. Alva Windham, now commodore of the Solomon Island YC, inquired of
> > me today if I knew if anyone had an Atomic 4 they wanted to sell--he's
> > looking for one to rebuild.  He tells me that he once had an A30,
> > named Dolphin. He left the Assn. in the late 1980's.  If you have an
> > A4 for sale, or know where there is one in rebuildable condition,
> > please contact him directly at windham at chesapeake.net or send the
> > information to me.
> > 
> > 2. I removed the stern tube, stuffing box, hose, and clamps from
> > Nevermore today; the engine is out and I am taking advantage of the
> > opportunity to replace, rebuild, and repaint without the joy of lying
> > on my belly in the cockpit and working beyond fingertip reach (in the
> > rain).  What I found was troubling if not positively dangerous. The
> > stern tube is about 1/8th inch OD larger than the stuffing box hose
> > flange OD. For some reason, a previous owner had  used standard
> > exhaust hose (two pieces, one over the other) on the tube which flares
> > down to one piece (only) on the stuffing box, all about 10 inches
> > long. Its been in the boat at least since I bought it in 1991, and is
> > quite ready for replacement.
> > 
> > The standard way to do this is to purchase a thick wall hose which is
> > sold particularly for this purpose, in lengths of about 4 inches. If
> > used, this would have put the stuffing box back closer to the deadwood
> > by about 3 inches, and may have been beyond the reach necessary to
> > tighten the gland nut when necessary.  The problem,(as I see it) is
> > that exhaust hose is not the proper material to use, and using two
> > thicknesses of exhaust hose means that the clamps never actually bear
> > on the inner hose, and, as the outer hose gets old and stiff, it may
> > leak and fail--and you can't fix it without pulling the boat.
> > 
> > Any comments from y'all?  I'd like to know if this is the normal way
> > Whitby did this, or was this the braincramp of a lesser genius?
> > 
> > RA
> 
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