[C38] Exhaust Riser

[Steve Smolinske]

Steve, 

 

Thanks, good information.  After talking with Catalina Direct and
Catalina Yachts Ive decided to weld up one out of stainless here at
work.  Price seems to have gone up to somewhere around 250-300.   Thanks
for the idea,

 

Steve

 

From: listserve-bounces at catalina38.org
[mailto:listserve-bounces at catalina38.org] On Behalf Of S Orton
Sent: Monday, December 13, 2010 9:48 PM
To: Cat 38
Subject: Re: [C38] Exhaust Riser

 

Steve S,  The original Cat 38 design of heavy cast steel pipe fittings
is a very poor design- to have all this vibrating weight cantilevered
off the exhaust manifold, which is going to fail at a threaded pipe
joint.  Catalina has redesigned the riser to an all welded fitting of
stainless for a price about $200 (6 + years ago) as I remember.  I would
give Catalina a call for price and bump that against a local fabrication
shop.  The redesigned part is of very simple construction- schedule 40
ss pipe, with welded mitered 90 degree bends, welded to a 3/8 ss plate
(as I remember), which is bolted to the exhaust manifold.  The part
weighed only about a 1/4 of the original design, with no threads to fail
in fatigue.  My big problem was hooking up the "flexible" hose to the
water muffler.  As your picture shows there is not much room allowed for
the hose to clear the underside of the sail locker and enter hose
fitting to the muffler.  I think mine was worse than what you have.  I
ended up making a 45 degree attachment fitting out of epoxy/glass to
solve that problem- which I still have the mold for if you or anyone
else would like to borrow it.  This subject would be a good candidate
for the MAINSHEET.
Cheers, Steve O 
 

________________________________

Date: Sun, 12 Dec 2010 19:05:04 -0800
From: SSmolinske at rainierrubber.com
To: listserve at catalina38.org
Subject: [C38] Exhaust Riser

About 2 years ago I rebuilt the exhaust riser in port on vacation, so
much for vacation.   I was in a small harbor with little in the way of
materials to work with, I used galvanized fittings and it worked fine
for the last 18 months.   Well its not working so well now and needs to
be rebuilt,  the attached photo shows what I did last time, does anyone
have any better suggestions?  Thanks all.

 

Steve

#312 Peregrine

Seattle


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