Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 02-04-2012, 10:19   #1
Registered User
 
SV Demeter's Avatar

Join Date: Dec 2009
Location: Cruising Eastern Caribbean
Boat: Taswell 49
Posts: 1,199
Marelon Vented loop suitable for exhaust?

I need to replace the vented loop in my engine's exhaust and am considering using a forespar marelon loop. The existing vented loop is stainless and the antisiphon valve on it shot so it end up dripping a little sea water on the exhast. If not Marelon suggestions for other suitable vented loop for exhaust is welcome.

Thanks,
SV Demeter is offline   Reply With Quote
Old 02-04-2012, 10:45   #2
Registered User

Join Date: Jan 2011
Posts: 35
Re: Marelon Vented loop suitable for exhaust?

I have seen a small (1/2") hose attached where your 'shot' valve is located; the hose is led to a cockpit drain and spills into the drain - gives you an air vent at the top of the loop and provides a visual on if the exhaust is working
micheck is offline   Reply With Quote
Old 02-04-2012, 10:59   #3
Registered User
 
SV Demeter's Avatar

Join Date: Dec 2009
Location: Cruising Eastern Caribbean
Boat: Taswell 49
Posts: 1,199
Re: Marelon Vented loop suitable for exhaust?

Quote:
Originally Posted by micheck View Post
I have seen a small (1/2") hose attached where your 'shot' valve is located; the hose is led to a cockpit drain and spills into the drain - gives you an air vent at the top of the loop and provides a visual on if the exhaust is working

Thanks but not easily workable in my boat. There was from the builder a hose attached to the vented loop that lead to a small barbed discharge in the hull right next to the actual exhast but it was not in use when I got the boat. When the vent in the vented loop failed and started leaking seawater onto the exhaust I replaced the broken fitting with a barb and ran a new length of hose but there is no flapper valve in the loop now so when the engine is running water is peeing out the overboard discharge in addition to the exhaust.

Its not an entirely bad scenario running the vent line overboard like this but the problem is twofold. One: I still should have a flapper valve of some sort in the vented loop and two: I dont like the vent being so close to the waterline. My exhaust discharges from the strbd side just above the waterline so I can envision a scenario where sailing hard on port tack the siphon break could allow water to flow into my exhaust and potentially flood the engine. My surveyor recommended a proper vented loop with a flapper valve and a short length of hose that runs to the bilge so the siphon could always be broken by sucking air.

I dont think I neccesarily need the hose run to the bilge as long as I have a decent vented loop with a functioning flapper I should not be seeing any leaks. Afterall these same loops are used in head discharges and they dont leak sewage.
SV Demeter is offline   Reply With Quote
Reply

Tags
exhaust

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
410: 2003 Lagoon 410 for $128K! eliems Lagoon Catamarans 40 20-02-2013 13:18
40' Cat for ICW Michelhhhebert Multihull Sailboats 22 22-08-2012 10:33
Satphone & HF for Ocean Crossings? Sabbatical II Marine Electronics 106 08-07-2012 00:43
Spanish & French Guides for Boaters GordMay The Library 1 14-06-2012 12:48
launching today - time for song sailorboy1 Flotsam & Sailing Miscellany 0 02-04-2012 08:24

Advertise Here


All times are GMT -7. The time now is 19:06.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.