[Public-list] muffler pipe

[Mike Lehman]

I have bronze on my boat - it has been there for 15+ years and I inspect it 
regularly and it is holding up fine. The only problem was when I first 
installed it, the connections would not stay tight. This was due to heat and 
expansion. After a while the connections sort of welded  together and 
everything has been fine since. I used hi-temp sealant during assembely, but 
that did not do much. In the early life of this system, when things 
loosened, I would just use a big pipe wrench and put another turn on the 
pipe. The combination of maintenance, sealant and time seems to have 
resulted in a very reliable long-lasting system.


Mike Lehman
~~~_/)_/)~~_/)~~~




----Original Message Follows----
From: Drenning <drenning at erols.com>
Reply-To: Alberg 30 Public List -- open to all 
<public-list at lists.alberg30.org>
To: Alberg 30 Public List -- open to all <public-list at lists.alberg30.org>
Subject: Re: [Public-list] muffler pipe
Date: Tue, 13 Mar 2007 22:54:29 -0400

George, Gordon,

I have to agree all things are subject to failure.  On my boat the
muffler system was stainless steel and it failed and since the failure
was prior to the cooling water being introduced we almost burnt the boat up!

When I went to rebuild the exhaust system I talked to Dr. Bruce Rankin.
He had just finished rebuilding his and he used black iron, so that was
the material I used in mine.

I realize when the A30's were converting to the water lift system Bob
Marshall engineered a muffler system using bronze, and
to the best of my knowledge none of these have failed.  I do not
remember why Bruce did not want to use bronze, I seem to recall that he
said the bronze was subject to becoming hard and brittle due to the heat
BUT please check this out.
Pat

George Dinwiddie wrote:

 >Gordon White wrote:
 >
 >
 >>DO NOT USE black iron or galvanized in the muffler system. If you ever
 >>have a muffler break - as we did  - you'll never forget it.
 >>
 >>
 >
 >I think that you can have a break with any material, if you leave it
 >long enough.  The last time I replaced my exhaust, it was because the
 >flange rusted and blew out, not the pipe.  No matter what you use, you
 >have to inspect it regularly (and replace as needed) if you don't want
 >failures under way.
 >
 >On the other hand, I've found that engine failures are an excellent way
 >to hone your sailing skills.
 >
 >  - George
 >
 >
 >
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