Return to the home page...

Go Back   Moyer Marine Atomic 4 Community - Home of the Afourians > Discussion Topics > Exhaust System

Reply
 
Thread Tools Display Modes
  #1   IP: 104.174.83.118
Old 02-02-2022, 10:08 AM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 9,504
Thanks: 191
Thanked 2,044 Times in 1,348 Posts
Tinkering with the exhaust system

Last year I installed an automatic waterlift drain. With the marginal hot section rise on a Catalina 30 it's one more level of protection against water incursion through the exhaust. Every time the engine is turned off the residual water in the waterlift drains into the bilge. After the drain period expires the drain valve closes.

The drain valve is closed when the ignition circuit is on, open for five minutes after the ignition is switched off, closed following that period and as a fail-safe, closed when power is removed.
Attached Images
 
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
The Following User Says Thank You to ndutton For This Useful Post:
Ando (02-07-2022)
  #2   IP: 142.116.40.164
Old 02-02-2022, 11:27 AM
GregH's Avatar
GregH GregH is offline
Afourian MVP
 
Join Date: Jun 2015
Location: Kingston, ON
Posts: 531
Thanks: 330
Thanked 92 Times in 73 Posts
Very interesting!

Is that a kit or a la carte items you put together?
__________________
Greg
1975 Alberg 30
Reply With Quote
  #3   IP: 104.174.83.118
Old 02-02-2022, 04:18 PM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 9,504
Thanks: 191
Thanked 2,044 Times in 1,348 Posts
a la carte

The attached drawing includes component info.
Edit: the wire colors on the drawing correspond to the wire colors on the components.
Attached Images
 
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others

Last edited by ndutton; 02-02-2022 at 07:35 PM.
Reply With Quote
The Following 3 Users Say Thank You to ndutton For This Useful Post:
Ando (02-07-2022), GregH (02-03-2022), W2ET (02-03-2022)
  #4   IP: 104.174.83.118
Old 02-03-2022, 11:18 AM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 9,504
Thanks: 191
Thanked 2,044 Times in 1,348 Posts
Without prior experience, programming the delay timer will be a challenge. There are over 33 timing sequences to choose from and a seemingly infinite range of delays, all selected by shorting the programming leads in a sequence or pushing either or both buttons on a programming circuit board which is not included in the purchase. After the considerable learning curve it's not that big of a deal but it's a steep curve getting there.

This may be a choose your battles moment. I can help because I've been through it. An option is to send me your timer (fits in an envelope) and I'll program it. Takes me maybe 10 minutes. I'll confess the first time took over an hour.
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
The Following 2 Users Say Thank You to ndutton For This Useful Post:
Ando (02-07-2022), W2ET (02-03-2022)
  #5   IP: 69.250.111.245
Old 02-04-2022, 11:34 AM
sastanley's Avatar
sastanley sastanley is offline
Afourian MVP
 
Join Date: Sep 2008
Location: Solomons, MD
Posts: 6,944
Thanks: 1,029
Thanked 546 Times in 407 Posts
Lightbulb

Neil, if you had one of those crappy Vetus waterlifts like I do, the plastic drain cap in the bottom of the muffler leaks all by itself, right into the bilge.
__________________
-Shawn
"Twice Around" - '77 Catalina 30, #511 with original A-4 & MMI manifold - for sale - PM me if interested
"Holiday" - '89 Alura 35 #109 (uh oh, two boat owner!!)
http://www.moyermarine.com/forums/signaturepics/sigpic3231_6.gif
Reply With Quote
  #6   IP: 104.174.83.118
Old 02-04-2022, 11:43 AM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 9,504
Thanks: 191
Thanked 2,044 Times in 1,348 Posts
Quote:
Originally Posted by sastanley View Post
Neil, if you had one of those crappy Vetus waterlifts like I do, the plastic drain cap in the bottom of the muffler leaks all by itself, right into the bilge.
Yeah Shawn, can't help you with that.
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
  #7   IP: 12.163.75.202
Old 01-17-2023, 01:21 PM
ejay ejay is offline
Senior Member
 
Join Date: Jul 2022
Posts: 13
Thanks: 0
Thanked 3 Times in 2 Posts
Neil, my C30 had a system of drainage just like yours, but I found that dumping water mixed with exhaust gases into the bilge, where it would sit for lengthy periods of time was not optimal. A previous owner installed the system so I don't know how many years it has been in place, but I wonder if the constant salt water bathing the keel bolts has contributed to some of the surface rust there. Also, the smell from the exhaust fouled water just underneath the salon is bothersome to my wife, which negatively impacts our weekend getaways on the boat.

Would it be possible to install a small water pump to move the exhaust water from the muffler to a drain somewhere when shutting off the engine? Is the temperature of the water from the muffler suitable for normal drain tubing?
Reply With Quote
  #8   IP: 76.176.224.167
Old 01-17-2023, 02:01 PM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 9,504
Thanks: 191
Thanked 2,044 Times in 1,348 Posts
I have not noticed an exhaust-y odor in the boat since the installation of the drain system. However, I'd be interested in the details of yours to see if there's a difference from mine. But remember, I'm not convinced such a drain is necessary. There's only a quart of residual water in the muffler after shutdown. It's just not significant.

Here's a picture of my vent hose where it attaches to the galley sink drain plumbing:
Attached Images
 
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
  #9   IP: 12.163.75.202
Old 01-17-2023, 02:35 PM
ejay ejay is offline
Senior Member
 
Join Date: Jul 2022
Posts: 13
Thanks: 0
Thanked 3 Times in 2 Posts
I agree that the small amount of water in the muffler is probably not the source of my engine issues.

We do have an petroleum like odor problem in the boat, which I have blamed on the exhaust water, but I am not sure now.
Reply With Quote
  #10   IP: 76.176.224.167
Old 01-17-2023, 02:49 PM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 9,504
Thanks: 191
Thanked 2,044 Times in 1,348 Posts
Quote:
Originally Posted by ejay View Post
We do have an petroleum like odor problem in the boat, which I have blamed on the exhaust water, but I am not sure now.
More likely it's from crankcase blowby. In the course of sorting out your engine issues we will certainly recommend a precise timing exercise which has a significant effect on blowby. If odor continues to be a nuisance you may be a candidate for the Indigo Electronics PCV system. On my boat it would be a last resort to stave off rebuilding.
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Exhaust system size ndutton Exhaust System 74 03-03-2022 05:24 PM
Santana 27 exhaust system Laszlo Exhaust System 51 05-18-2016 02:51 AM
A few critical suggestions Don Moyer General Interest 20 02-10-2014 02:45 PM
New exhaust system jsedivy Exhaust System 11 08-01-2011 08:50 PM
Tartan 30 exhaust system rebuild jacques debauche Tartan 2 05-22-2010 07:48 AM


All times are GMT -4. The time now is 07:21 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2023, vBulletin Solutions, Inc.


Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2023 Moyer Marine Inc.

All Rights Reserved