#1
IP: 47.185.168.184
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Will this work?
I have a 1977 Atomic 4 on my Cal 30. The old standpipe exhaust system bit the dust or rust! I want to run a dry pipe from the exhaust manifold and then use the raw water exhaust as the coolant. This will run directly overboard, no muffler, etc. I have sufficient fall (slope) from the engine exhaust water to ensure no backflow. Pic attached showing the assembly.
Basicially the same as the MMI Catalina preassembled exhaust but with a 3" pipe turning outboard from the engine exhaust flange. Any thoughts on why this won't work? Many thanks. Gregg |
#2
IP: 50.54.38.4
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Without a muffler, it would be really loud. Why do you want to do this, a muffler is pretty cheap. I have been using the cheapo Vetus for 18 years - no issues. They are only $120 or so.
Is it because the exhaust hose is difficult to route?
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Jim Zeller 1982 Catalina 30 Kelleys Island, Ohio Last edited by Administrator; 07-16-2018 at 08:22 AM. |
#3
IP: 24.224.194.51
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Hi there,
This is an edit from my previous post. I didn't recognize the orientation of the pic at first. From what I see you are well protected from water intrusion although I think I would have gone with a hose to a vetus muffler down low and just rubber pipe out from the muffler. The life expectancy of black iron pipe is 3 to 5 years as well...the less the need to replace on that stuff the better. Every piece will be rusted after the portion near the manifold gives up the ghost. The section near the manifold goes first because of the constant change in temperature.
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Mo "Odyssey" 1976 C&C 30 MKI The pessimist complains about the wind. The optimist expects it to change. The realist adjusts the sails. ...Sir William Arthur Ward. Last edited by Mo; 07-16-2018 at 08:58 AM. Reason: diagram. |
#4
IP: 24.152.132.140
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More than one way to skin a cat
Gregg, it will work fine. The same design has worked successfully on Catalina 27s for 47 years. A couple of things to consider though:
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Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
#5
IP: 32.211.28.40
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Use plenty of insulation. The exhaust system can give off a lot of heat - particularly when it breaks! Photo shows a bilge blower after a broken exhaust incident.
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#6
IP: 137.200.32.54
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You need a LOT of wrap. 2 layers would IMHO be minimum.
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