Replacing M25 exhaust elbow

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alexanne
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Joined: 12/15/12
Posts: 61
Replacing M25 exhaust elbow

Hi, I am a new member, in the final stages of the purchase of a 1985 C36 #432. Among other things the exhaust needs looking after... I previously owned a C30 so am somewhat familiar with the system. I do not like the pipe elbow contraption that Catalina uses I think it can be improved. Westerbeke makes a cast riser that is much better, but then I came across this one from Moyer Marine... It is the ultimate simplicity, anyone tried one yet?

"Inline cooling water exhaust entry fitting

The tapered pipe threads on top of this fitting are 1-1/4", and the hose barb on the bottom is sized to accept 1-5/8" ID exhaust hose. The inlet fitting on the side is sized to accommodate 1/2" ID hose."

Alex Lorenz
C36 #0432 SR Alexanne

Alex H.
SV Alexanne, 1985 #432 SR
SF Marina Bay YH

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benethridge
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Joined: 5/13/09
Posts: 446

I'm interested coz I repaired mine last year. (See my post elsewhere on that.)

However, I don't really see how it works yet from your description and the picture. Seems like you would still need an "elbow" somewhere.

Ben Ethridge
Miami, FL
1984 MK1 Hull# 263

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stu jackson c34
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Joined: 12/3/08
Posts: 1270

Our inlet water line to the nipple is 5/8", yours may be, too.

Stu Jackson, C34IA Secretary, C34 #224, 1986, SR/FK, M25 engine, Rocna 10 (22#)

alexanne
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Joined: 12/15/12
Posts: 61

I am thinking that you could use this to inject the water after the manifold and use a side inlet (Vernalift) muffler. Then you can run exhaust hose to the muffler and may not have to insulate anything. Vernalift says muffler needs to be 2' away and the top 12" below exhaust. I think 1/2" would let enough water in, may have to make an adapter.

Alex

Alex H.
SV Alexanne, 1985 #432 SR
SF Marina Bay YH

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MitchMan406
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Joined: 12/31/11
Posts: 71

 "The tapered pipe threads on top of this fitting are 1-1/4", and the hose barb on the bottom is sized to accept 1-5/8" ID exhaust hose. The inlet fitting on the side is sized to accommodate 1/2" ID hose."

Good find!
Awesome info here.
This will save me a pretty penny!
Thanks, Alexanne!

Mitch

1986 Catalina 36 MKI 
S/V "Blessing"
Kema, TX
Hull: #584
M25 w/ Oberdorfer Conversion
 

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