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  #1   IP: 24.152.131.220
Old 07-30-2011, 03:41 PM
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Exhaust Systems and Hot Section Specs

Okay, I'll start this category off by posting two of my favorite pdf's on exhaust systems. One has drawings from Sparkman and Stephens on muffler types, a great reference on the subject, the other covers the USCG specifications on marine exhaust systems.

For those contributing to this forum category, you're encouraged to provide as many descriptive tags as possible to make future searches easier.
Attached Files
File Type: pdf Exhaust system details.pdf (78.9 KB, 376 views)
File Type: pdf NTSB (USCG) Exhaust Specs.pdf (573.2 KB, 324 views)
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Old 08-01-2011, 01:06 AM
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I've been trying to see that water lift pic for weeks, but I guess it's that bad quality wise. Does anyone have the origonal they scanned?
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Old 08-01-2011, 04:07 AM
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Here are the originals I have such as they are. I've included a three stage functional drawing of a waterlift I stumbled across too.

Really sorry for the quality but it is what it is.

Waterlift detail.jpg Waterlift elevation.jpg

Waterlift function.jpg
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prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others

Last edited by ndutton; 05-10-2012 at 06:29 AM.
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  #4   IP: 24.152.131.153
Old 03-12-2013, 09:38 PM
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Here's another waterlift system drawing
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1977 Catalina 30
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prior boats 1987 Westsail 32, 1970 Catalina 22
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Old 03-12-2013, 10:18 PM
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There are volume considerations. was that included in the diagrams and specs?
They are not loading for me tonight.

One side cant be more volume then the other side...
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Old 03-13-2013, 12:23 AM
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Quote:
One side can't be more volume than the other side...
Yeah, actually it can. The Catalina 30 has approximately 2 feet of exhaust hot section before the waterlift and around 18-22 feet after.

What really matters is the waterlift's capacity must be greater than the volume of the downstream exhaust hose from the waterlift to the top of the hump. It has to contain any backwash on shutdown.
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Old 03-13-2013, 01:04 AM
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Right Neal. That is what I was getting at.
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Old 03-13-2013, 08:35 AM
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Quote:
Originally Posted by romantic comedy View Post
Right Neal. That is what I was getting at.
Sorry RC, I apparently misunderstood your post.
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Old 03-13-2013, 08:25 PM
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A little help please.

Doing the rebuild. Black pipe, flange, water injector port, everything fits nicely.

However, the water hose is 3/4. How have you guys chosen to reduce the water hose to fit the injection barb?

Is the barb pipe thread? I went to te hardware store tonight, and nothing threaded on that well.

I was thinking of adapting the port, but the store was out of what I needed. Off to a different store tomorrow.

Did some of you nevk down the hose?

Thanks or he help.
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