Fuel line return - SailNet Community
 
LinkBack Thread Tools
post #1 of 7 Old 07-18-2011 Thread Starter
Junior Member
 
Join Date: Jul 2010
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Fuel line return

I have 1986, PS 34. My question is there are two air vents near where fill hole for diesel tank. First one I am guessing is overflow vent when filling the fuel tank. My question relates to the second vent and its function. My second vent is flowing out clear liquid when the engine is running. Need some advise before I try to fix the problem. It doesn't smell like diesel but it does leave a stain in water. Maybe its unburned diesel but before I route it back to diesel tank need a little input.
jimhuggins0350 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 7 Old 07-18-2011
Not Finished Yet
 
RainDog's Avatar
 
Join Date: Jun 2009
Location: Kemah, TX
Posts: 675
Thanks: 20
Thanked 34 Times in 31 Posts
Rep Power: 7
 
A picture might help. You are talking about air vents in the cockpit near where the fill hole on the bridge deck is? or on the tank?

What is the temperature of the liquid flowing out? If you put some in a cup and then add water, do the two mix, or stay separate?

Pacific Seacraft 34 #142

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

RainDog is offline  
Quote Quick Reply Share with Facebook
post #3 of 7 Old 07-18-2011 Thread Starter
Junior Member
 
Join Date: Jul 2010
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
air vent in cockpit, the liquid is not hot or warm, I will do the "add water test" and let you know the findings, thanks for advise.
jimhuggins0350 is offline  
Quote Quick Reply Share with Facebook
post #4 of 7 Old 07-18-2011
Not Finished Yet
 
RainDog's Avatar
 
Join Date: Jun 2009
Location: Kemah, TX
Posts: 675
Thanks: 20
Thanked 34 Times in 31 Posts
Rep Power: 7
 
Strange. I have seen a boat that plumbed the engine freshwater intake to a cockpit vent so you could see if the cooling system stops pushing water. If it is water, it is possible that is what it is, but I doubt the factory ever did that.

Have you traced the hose of the back of the vent to see where it leads?

Pacific Seacraft 34 #142

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

RainDog is offline  
Quote Quick Reply Share with Facebook
post #5 of 7 Old 07-18-2011 Thread Starter
Junior Member
 
Join Date: Jul 2010
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Good advise I will trace the hose, Thanks
jimhuggins0350 is offline  
Quote Quick Reply Share with Facebook
post #6 of 7 Old 07-18-2011
Senior Member
 
Join Date: Oct 2001
Posts: 191
Thanks: 0
Thanked 8 Times in 7 Posts
Rep Power: 14
 
The vent that you are referring to is for the vented loop in your raw water line to the injection elbow in your exhaust system.If it is spitting liquid that's an indication that you should service (clean) the vented loop.To find the vented loop follow the hose back from the injection elbow,on the 37 its under the coaming on the starboard side just above the expansion tank.

good luck,
Dianne and Chuck Burke S/V NiftyNickers C37 #139
niftynickers is offline  
Quote Quick Reply Share with Facebook
post #7 of 7 Old 07-18-2011
Senior Member
 
DaveMancini's Avatar
 
Join Date: Sep 2006
Location: Aboard
Posts: 198
Thanks: 6
Thanked 14 Times in 13 Posts
Rep Power: 9
 
I have also seen boats where the one way valve at the top of the vented loop was removed to eliminate the possibility of the valve getting stuck closed and creating a syphon. But, this also meant that a little water would continuously flow from the loop into the cockpit when the engine was running (a good sign). One proponent of this lash-up was Hal Roth.

Dave Mancini
s/v Swan, PSC 34 #305
DaveMancini is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
fuel system, no return line Barry33 General Discussion (sailing related) 25 12-03-2009 12:18 PM
Diesel return line SVCetacea Gear & Maintenance 1 09-30-2008 10:03 AM
fuel-return line.. . whatoo General Discussion (sailing related) 5 03-31-2006 08:19 AM
Fuel Return Ratio pma_foyl Gear & Maintenance 8 07-22-2004 01:22 AM
Fuel Return Ratio pma_foyl General Discussion (sailing related) 1 07-09-2004 10:10 AM

Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome