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Jason,
I was in the same situation a few years ago. It's too bad Univair
decided to sell only the more expensive stainless steel pipes. Skyport's
source for exhaust pipes is Wag-Aero. Wag-Aero pipes will not fit O-200
installations. Reason from Wag-Aero: "The engine shock mounts are thicker
on O-200 installations." End of story.
My soft steel exhaust stacks are from Univair, as your picture shows
they are too. They fit great for O-200 installations. Wag-Aero pipes are
too short and will rub hard against the lower engine mount braces where the
exhaust pipe turns inboard toward the muffler. Plus the muffler is too
close to the nose strut upper mounting cup, you would have to cut a hole in
the heat shroud. I'm unsure if Wag-Aero changed their tooling just because
of me.
If you're like me, forking out $1500 bucks for two stainless tubes
from Univair can put a dent in any repair budget. There is, luckily, an
alternative. You can get your pipes repaired; even the one in your picture
is not a problem. Places like http://www.dawley.net I've heard will do a
wonderful job repairing pipes to like new status. Yes, they are FAA
approved.
Those "beads" you speak of are what's left of the "flash-coating"
when the pipe was new. Hot spots on the pipe tend to melt this coating off
through time. When the pipe was new it had a nice white color coating from
Univair.
Walt Uebele
N94113
-----Original Message-----
From: Jason J. Ellingson [mailto:[EMAIL PROTECTED]
Sent: Monday, December 26, 2005 9:48 PM
To: 'Coupe-Tech'
Subject: [COUPERS-TECH] RH exhaust stack
----[Please read http://ercoupers.com/disclaimer.htm before following any
advice in this forum.]----
My right hand (passenger side) stack has a nasty 3-way crack at the join for
cyl 2/4. It isn't going to pass inspection (decided to do my annual now
instead of June since I was tearing into the plane anyhow).
I suppose I could try to have it welded up, but I'm also considering a
replacement. Of course Univair charges over $500 for it (P/N: 40402-S). I
see Wag-Aero selling a RH Stack Assembly for $200 (SKU#: E-303-002).
Here's the million dollar question... will it fit? I see a prior posting in
here from September 2005 saying that the stack sold by Skyport seems to be
from Wag-Aero and that it didn't fit the O-200 installation (which is what I
have). I looked in my logs and it says that the existing C-75/85 exhaust
was used for the O-200 installation... this seems conflicting? Or is the
Wag-Aero for the older "A" series? (A-65/75) -- Univair only lists one
exhaust part... that seems to imply that they are all the same?
I'm in Nashville and am not against sending off for a newly built one (I'm
willing to send in the old one for "source" part), but it would have to be
an FAA repair facility that is authorized to build this "new" stack as my
head mechanic/IA is pretty picky.
Also, look at the picture... has anyone any idea why both of my stacks have
all these "beads" on them? My guess would be that it is some sort of
solder? Weird.
------------------------------------------------------------
Jason J Ellingson
NC2273H
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