Fuel leak - SailNet Community
 
LinkBack Thread Tools
post #1 of 9 Old 07-10-2014 Thread Starter
Junior Member
 
Join Date: Jan 2014
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
There's a leak in the fuel lines at the tank. I'm including a pic. Just feeling at the connections the one absent a valve shows fuel at the joint where the hose connects to the fitting. I'm not 100% but this looks like the return. The problem I'm having is that its hard to start when cold. Would a leak on the return side cause this? What's the fix?


Last edited by jthalbert; 07-10-2014 at 10:24 PM. Reason: [IMG][IMG]http://img.tapatalk.com/d/14/07/11/a4y8e2ym.jpg[/IMG][/IMG]
jthalbert is online now  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 9 Old 07-10-2014
Jd1
Member
 
Join Date: Aug 2011
Location: Victoria, BC
Posts: 78
Thanks: 1
Thanked 6 Times in 6 Posts
Rep Power: 4
 
Re: Fuel leak

That should not affect starting in any way. If it was the main fuel line you would have all kinds of engine issues and not just hard starting when cold.
Jd1 is offline  
Quote Quick Reply Share with Facebook
post #3 of 9 Old 07-10-2014 Thread Starter
Junior Member
 
Join Date: Jan 2014
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Fuel leak

Even in a diesel engine?
jthalbert is online now  
Quote Quick Reply Share with Facebook
post #4 of 9 Old 07-11-2014
Jd1
Member
 
Join Date: Aug 2011
Location: Victoria, BC
Posts: 78
Thanks: 1
Thanked 6 Times in 6 Posts
Rep Power: 4
 
Re: Fuel leak

Especially a diesel engine .... because if you have leak in the suction line you will get air into the fuel system and nothing causes more weird issues on a diesel than a tiny bit of air. If you get a lot of air into the fuel then it just won't run at all.
Jd1 is offline  
Quote Quick Reply Share with Facebook
post #5 of 9 Old 07-11-2014 Thread Starter
Junior Member
 
Join Date: Jan 2014
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Fuel leak

Hmm.. That's not contradictory? I think it gets just a bit if air on the suction side and won't start until its been cleared, which is why its hard to start but runs fine otherwise. Especially if its the return line depressurizing the entire system as it sits, because then once the engine runs there's no more air getting in, only exiting on the low pressure side. At least this is my thought. I'm just wondering if the leak on the return side can cause air to get into other parts of the system and cause my starting problem.

Also I'm wondering about the fix - there aren't clamps on the line, I assume they must not be appropriate? What will need to be done to seal the leak? I think it should be fixed regardless of whether its causing my starting problems right?
jthalbert is online now  
Quote Quick Reply Share with Facebook
post #6 of 9 Old 07-11-2014
Jd1
Member
 
Join Date: Aug 2011
Location: Victoria, BC
Posts: 78
Thanks: 1
Thanked 6 Times in 6 Posts
Rep Power: 4
 
Re: Fuel leak

Quote:
Originally Posted by jthalbert View Post
Hmm.. That's not contradictory? I think it gets just a bit if air on the suction side and won't start until its been cleared, which is why its hard to start but runs fine otherwise. Especially if its the return line depressurizing the entire system as it sits, because then once the engine runs there's no more air getting in, only exiting on the low pressure side. At least this is my thought. I'm just wondering if the leak on the return side can cause air to get into other parts of the system and cause my starting problem.

Also I'm wondering about the fix - there aren't clamps on the line, I assume they must not be appropriate? What will need to be done to seal the leak? I think it should be fixed regardless of whether its causing my starting problems right?
Nothing contradictory there.
The return line usually is the bleed from the injectors and you can do anything you want with that - you could run it into an open bucket and it won't make a difference. Even if it didn't leak, that line just goes into the top of the tank which is vented anyway.
The fitting is one you see in autonotive stores. I don't know how they seal. Are you sure it's the hose-to-fitting and not the fitting-to-right angle fitting ?
Yes, it should be fixed no matter what but it ain't causing your hard starting issue!
Jd1 is offline  
Quote Quick Reply Share with Facebook
post #7 of 9 Old 07-11-2014 Thread Starter
Junior Member
 
Join Date: Jan 2014
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Fuel leak

Quote:
Originally Posted by Jd1 View Post
Especially a diesel engine .... because if you have leak in the suction line you will get air into the fuel system and nothing causes more weird issues on a diesel than a tiny bit of air. If you get a lot of air into the fuel then it just won't run at all.
Exactly. When I bought the boat I couldn't get the engine to run at all. I bled the lines and presto! Fired right up. I'm sure there could be a leak in the system elsewhere as well causing the problem, but I'm 99% certain this is what it is. A little bit of air in the line is making the engine do weird things, right?

What else should I be looking for that's causing the hard starting?
jthalbert is online now  
Quote Quick Reply Share with Facebook
post #8 of 9 Old 07-11-2014
Jd1
Member
 
Join Date: Aug 2011
Location: Victoria, BC
Posts: 78
Thanks: 1
Thanked 6 Times in 6 Posts
Rep Power: 4
 
Re: Fuel leak

Quote:
Originally Posted by jthalbert View Post
What else should I be looking for that's causing the hard starting?
There are many many possibilities but assuming the engine starts up quickly when warm, even after having been stopped for an hour, I would look at the glow plugs. How long do you activate the glow plugs for before attempting a cold start?
Is the engine turning over quickly during the start or is it slow and obviously labouring?

Beyond those basics we could be talking low compression, fouled injectors and a host of other possiilities. Unfortunately those are a bit more difficult to diagnose via internet.
If you suspect air getting into the fuel system, that is a possibility too but it would not relate to the fuel return system.

BTW, if you are doing excessive cranking trying to start the engine, watch that you you don't fill the water lift muffler with water - you could cause a water lock situation and all kinds of damage.

Last edited by Jd1; 07-11-2014 at 07:03 AM.
Jd1 is offline  
Quote Quick Reply Share with Facebook
post #9 of 9 Old 07-11-2014
Senior Member
 
Join Date: Jun 2006
Location: Eastern Shore MD
Posts: 135
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 10
 
Re: Fuel leak

What kind of engine do you have? As posted earlier a leak in the return shouldn't affect your starting.

Older Yanmars for instance, if it's cold, want the throttle advanced when starting. Remeber you can't 'flood' a diesel, just be ready to throttle back to idle when she starts.

If you have glow plugs I'd be checking that next.
saillife is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

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
Outboard fuel leak davidpm Gear & Maintenance 8 08-07-2013 06:56 PM
Fuel Leak? mikefossl Diesel 2 02-17-2012 11:23 PM
Yanmar Fuel Leak jnj Gear & Maintenance 3 07-19-2005 12:41 AM
fuel tank leak gart Gear & Maintenance 1 03-23-2004 12:04 PM
Fuel Tank Leak silversea Gear & Maintenance 1 02-13-2002 04:05 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

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