Fuel Filter Placement - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 27 Old 02-02-2009 Thread Starter
Ignoring Trolls in 2009
 
TxLnghrn's Avatar
 
Join Date: Apr 2008
Location: Houston, TX
Posts: 453
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
 
Fuel Filter Placement

Due to some recent difficulties (Thank God for Tow Boat US), with our fuel system, I am thinking about upgrading our primary fuel filter from the current Racor 120 series spin on to a Racor 500 series. The problem I am facing is that the current location for the fuel filter doesn't allow for the 12-plus inches required for the 500. Would there be a problem with mounting the 500 with it's inlets approximately 8-10 inches above the top of my fuel tank, roughly parallel with my injectors? The engine is a Yanmar 2gm20f. My main concern is whether the pump would have a problem pulling fuel up against gravity before it gets to the high pressure side.

Michael

S/V Anything Goes
1987 Pearson 31-2
Hull #15
TxLnghrn is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 27 Old 02-02-2009
Senior Member
 
Join Date: Dec 2007
Posts: 201
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
 
Tx -

Why do you want to go bigger? The 500 is overkill for that engine, although there are definitely bragging rights involved.

I am thinking you got screwed by a clogged filter by your post?
jason3317 is offline  
Quote Quick Reply Share with Facebook
post #3 of 27 Old 02-02-2009
Senior Member
 
Join Date: Sep 2006
Location: Scotland
Posts: 2,364
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 9
 
Fit a pump to pressurise your system?

I fitted one of the Walbro 2403-1 pumps.

It's a 5 psi pump, and should work for you. Thereafter, downstream of the pump, air never can leak in again. Fuel can leak out, but then you see the leak and you can see it and fix it.
.
Rockter is offline  
Quote Quick Reply Share with Facebook
post #4 of 27 Old 02-02-2009
Senior Member
 
Join Date: May 2004
Location: Long Is.
Posts: 329
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
 
Those little on-engine fuel pumps can exert a LOT of suction. The bottom of my fuel tank is several feet below the pump and it never had problems sucking the tank dry :-)

That said the suggestion for an electrical pump between the tank and the filters has a lot of merit. It also makes bleeding the filters after changing the element very easy.
gc1111 is offline  
Quote Quick Reply Share with Facebook
post #5 of 27 Old 02-02-2009
Senior Member
 
Join Date: Oct 2006
Location: Virginia
Posts: 725
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
It is my understanding that the racor 500 is to be used under suction and not made to be pressurized. So put the pump between the racor and the engine.

That derelict boat was another dream for somebody else, don't let it be your nightmare and a waste of your life.
badsanta is offline  
Quote Quick Reply Share with Facebook
post #6 of 27 Old 02-02-2009
Break, curse, fix, repeat
 
bwindrope's Avatar
 
Join Date: Feb 2007
Location: Bainbridge Island, WA
Posts: 267
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 9
 
Not filter size problem

Hi Michael,
I sympathize with your problem but agree with Jason that it is not a filter size problem. I have a Gulf 32 with a 70 gallon diesel tank and use a Racor 15S 2 micron. It is rated for something like 15 gallons an hour when my 4 cylinder Universal 5432 uses less than 1 gallon an hour at full throttle. I just happened to change my primary filter and after 150 hours it was nearly like brand new. I change mine once a year just to be extra careful. Your smaller motor uses even less fuel and so filter size is definitely not your issue.

Long story short, your problem lies elsewhere. What I love about diesels is that they are so darn easy to diagnose, especially when compared with the modern gas engine.

I also have a Walbro pump as my electric pump, and it lies between the filter and the engine. Although my Racor has a primer pump on it to fill the system at filter changes, I have used the electric pump to do my own fuel polishing, which you may want to do as well.

Anyway, just my two cents that I wouldn't think your problem is at all related to the size of your Racor. Good luck, and keep us posted.

Aeolus
Gulf 32
Bainbridge Island, WA

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
bwindrope is offline  
Quote Quick Reply Share with Facebook
post #7 of 27 Old 02-02-2009
Senior Member
 
Join Date: Oct 2006
Location: Virginia
Posts: 725
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
What ever filter you go with. it sounds like you have crud in the tank and you should fix that first. If not a large tank you could drain, flush and fill with new. If a larger tank you may have to have some one polish the fuel. What they do is pump it out and filter it and replace the cleaned fuel.

That derelict boat was another dream for somebody else, don't let it be your nightmare and a waste of your life.
badsanta is offline  
Quote Quick Reply Share with Facebook
post #8 of 27 Old 02-03-2009
Senior Member
 
blt2ski's Avatar
 
Join Date: May 2005
Posts: 6,862
Thanks: 0
Thanked 26 Times in 25 Posts
Rep Power: 12
   
I use the Racor 120 also with my 2gm20f on my Jeanneau. I personally can not see using a bigger filter! As others have said, I think there is another issue, ie junk in the tank, bad fuel that last fill up etc. Those are the usual reasons for clogging fuel filters with diesels, be it in my pickup, dumptruck, trackhoe, bobcat or sailboat!

marty

She drives me boat,
I drives me dinghy!
blt2ski is offline  
Quote Quick Reply Share with Facebook
post #9 of 27 Old 02-03-2009
Senior Member
 
Join Date: Sep 2006
Location: Scotland
Posts: 2,364
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 9
 
The Racor filter will have a pressure rating somewhere, both burst and collapse. I looked for it but could not find it. Racor should know.

I reckon that 5 psi burst loading is not a lot for a filter housing to take, surely?

I still reckon that the pump should be upstream of the filter. Your filter is less likely to clog, as it is pressure driven. Your lift pump will not have to do work at all. In my own set-up, I can switch off the electrical charge pump and the motor still runs. The pump manufacturer very kindly has built a wee by-pass port into the pump. They are not expensive, at close to $80.

This electrical charge pump set-up is not for everyone. There is an added fire risk if you spring a leak, but fuel leaks out and not air in, and you will see it. When you stop the motor, you can leave the pump on and listen for the wee "rat-tat-tat" as the pump maintains pressure. It is a good leak test. Older motors tend to get a wee bit leaky on the fuel lines sometimes.

It certainly keeps air out of there, and the motor really cannot draw air without you seeing the fuel filter level dropping. In the past, I could draw air downstream of the filter and not see it. and not see it. I had that happen a few times in the past, and it's a heart-stopper as the motor slows, and coming into a harbour it is bloody awful. It does not happen now.

Bleeding your fuel system is much easier too with an electrical lift pump.
.

Last edited by Rockter; 02-03-2009 at 03:27 AM.
Rockter is offline  
Quote Quick Reply Share with Facebook
post #10 of 27 Old 02-03-2009
Senior Member
 
celenoglu's Avatar
 
Join Date: Dec 2008
Posts: 666
Thanks: 0
Thanked 13 Times in 12 Posts
Rep Power: 7
 
The fuel pump on the engine will handle this height. Install the filter where you can, but make sure you bleed the system. After all the hoses and the filter is full with fuel you will not have a problem.
celenoglu 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
Bleeding your Yanmar Engine artbyjody Gear & Maintenance 38 06-20-2014 02:34 PM
Bleeding Universal M12 M275sailer Gear & Maintenance 6 09-11-2008 11:58 PM
Universal M21, long story and fuel line question BarryL Gear & Maintenance 16 05-12-2008 03:37 PM
Diesel Fuel Essentials Tom Wood Gear and Maintenance Articles 0 03-22-2004 07:00 PM
Diesel Fuel Essentials Tom Wood Her Sailnet Articles 0 03-22-2004 07:00 PM

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