Reply
 
Thread Tools Search this Thread Display Modes
 
Old 07-16-2018, 02:21 PM   #1
Senior Member
 
City: Jacksonville Fla
Country: USA
Vessel Name: The Office
Vessel Model: Marine Trader
Join Date: Oct 2013
Posts: 161
Fuel contamination

This wad of crud clogged the 1/2id inlet on a racor. What is it? What to do to prevent? The owner used bibor and had the tank cleaned weeks before the incident. Caused engine shut down offshore and boatus tow.

https://photos.google.com/photo/AF1Q...lccpua7Ii5Hh_8



I added another racor 1000 and switch in parallel
__________________
Advertisement

Autoteacher is offline   Reply With Quote
Old 07-16-2018, 03:12 PM   #2
Veteran Member
 
Solly's Avatar
 
City: Solomons MD.
Country: USA
Vessel Name: Sun Runner
Vessel Model: 1985 Mainship 34 Trawler MK III
Join Date: Mar 2018
Posts: 31
No pic.. "URL not found"
__________________

Solly is offline   Reply With Quote
Old 07-24-2018, 01:18 AM   #3
Senior Member
 
kapnd's Avatar
 
City: hawaii
Country: usa
Vessel Name: #31
Vessel Model: ex-Navy MUB 50 fish/cruise
Join Date: Aug 2013
Posts: 418
Biobor use often results in increased levels of crud for your filters to digest.
Following use of the stuff, you need to be prepared with plenty of spare filters!
It sounds like the P.O. might be BSing about having the tank cleaned, so the ball is now in your court.
Large clumps that block the filter inlet sound pretty scary, and surely indicate that the tank is not clean, and the fuel needs polishing too.
__________________
You can lead a horse to water,
But you can't make him ski...
kapnd is offline   Reply With Quote
Old 07-24-2018, 07:45 AM   #4
Senior Member
 
City: Lakeland
Country: United States
Vessel Model: Looking for the next one
Join Date: Feb 2018
Posts: 115
To your original question, "What is it?" From your description, it sounds like it's a clump of algae. Diesel fuel tanks, especially those that aren't kept topped up and/or have been sitting unused for a while, can form condensation in them. That water provides a breeding ground for algae. The tiny critters are bad enough but their excrement can settle like sludge on the bottom and sides of the tank, often getting sucked into the fuel lines and clogging the fuel lines and primary and secondary filters. Pretty common, actually. Happened to us, too, when we bought our boat and started to move it home. Completely shut down our starboard engine.

Probably your best solution is to run the tanks down to a minimum level and then have a tank cleaning and fuel polishing done. (They charge by the gallon so might as well have them do it when your tank is nearly empty.)
JohnEasley is offline   Reply With Quote
Old 07-24-2018, 11:28 AM   #5
Guru
 
Heron's Avatar
 
City: Cypress Landing Marina (NC)
Country: USA
Vessel Name: Heron (2)
Vessel Model: '88 Cape Dory 28 Flybridge #115
Join Date: Nov 2014
Posts: 1,180
While I can't see your pic, it might very well be ASPHALTINE. An unfortunate side benefit of old diesel fuel. Check out my thread on this when I discovered the problem. Lots of pics and progressive filter solutions to avoid those surprise shut-downs..:

Funky Fuel filters....>>
__________________
Steve
Heron is offline   Reply With Quote
Old 07-24-2018, 11:31 AM   #6
Guru
 
City: Seaford Va on Poquoson River, VA
Country: United States
Vessel Name: Old Glory
Vessel Model: 1970 Egg Harbor 37 extended salon model
Join Date: Jan 2016
Posts: 1,671
I have been wondering, why dont they seal the tanks from the humid air?
For Gasoline, they use a VOPR system, vapor over pressure relief, it lets tank vent above 1 psi, and lets air in when motors draws fuel, but most of the time, the tank is not being used, so it will be sealed from outside air. It has made a huge difference on my gas powered boat using the VOPR type cap.

Here is a vpr valve goes into the 5/8 vent line then exits the hull.
This would be used with a vented fuel fill
BK0280025 - Diurnal Control Valve (DCV) 5/8" x 5/8" - Vapor Space Management - OE Boat Builders
sdowney717 is offline   Reply With Quote
Old 07-24-2018, 02:03 PM   #7
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 2,126
I donít know if the majority of water in the tanks come from the vents or rather in leaking O rings on the fuel filler. Good thing to check and see if they are in good condition or not.
Comodave is offline   Reply With Quote
Old 07-24-2018, 03:10 PM   #8
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 17,573
Water is part of even "clean" fuel fresh from the distributor.

The chance exists that the marina might change their filters often enough does exist.

Good luck ,the commercial fuel docks do a better job than marinas.

A Baja filter should catch heavy water coming in with the fuel , but is a PIA as it slows down the fueling.

The only real good solution to water in the fuel is a sump that can be pumped easily.
FF is online now   Reply With Quote
Old 07-24-2018, 04:52 PM   #9
Guru
 
Fletcher500's Avatar
 
City: So-Cal
Country: USA
Vessel Name: Chelsea Rose
Vessel Model: Helmsman 43 PH
Join Date: May 2016
Posts: 750
John Easly, do you have some data from an engine manufacturer or other reputable source that condensation and subsequent water accumulation in the fuel tanks occurs (enough to cause issues) if tanks are not kept full? I am not talking about years, just a season for example. I previously thought the same thing, but after some digging, including on TF, found it to be mostly anecdotal wives tails. It has been discussed in detail many times, so no need to create a 10page string, but just wondering if you have some data to support your statement?
Fletcher500 is offline   Reply With Quote
Old 07-24-2018, 09:56 PM   #10
Guru
 
boatpoker's Avatar
 
City: Port Credit
Country: Ontario
Vessel Name: DIRT FREE
Vessel Model: Benford Fantail 38
Join Date: Sep 2012
Posts: 2,082
Algae simply cannot exist in the presence of diesel.
There are certain bacteria that can.
__________________
If you can live with the consequences, go for it - wg
Y'am what y'am an' thats' all that y'am - Popeye
I had an allergic reality - Jillie the Bean
boatpoker is offline   Reply With Quote
Old 07-25-2018, 05:29 AM   #11
Guru
 
City: Seaford Va on Poquoson River, VA
Country: United States
Vessel Name: Old Glory
Vessel Model: 1970 Egg Harbor 37 extended salon model
Join Date: Jan 2016
Posts: 1,671
Racor says water comes from condensation inside tanks.
http://www.racornews.com/single-post...es-Worst-Enemy

Quote:
Water is commonly found in diesel fuel due to condensation, handling and environmental conditions.

Diesel fuel tanks are always subject to water condensation because diesel fuel, unlike gasoline, has no vapor pressure to displace air. When a fuel tank is warm, the air expands and is forced out. As the tank cools at night, humid air is sucked back into the tank and water condenses out on the cooler tank walls. (One reason to keep diesel fuel tanks topped off if possible.)

For ethanol gasoline, does not require visible water in fuel for acetobacter to grow.
In the fuel are micro droplets of water, the bacteria live at the interface of the water and fuel layers within the droplets scattered throughout the fuel.

That water is easily absorbed from the air right into the fuel. It is easy to demonstrate, on a warm humid day, put gas in a clear jar, in a few minutes it turns cloudy from absorbing water.

Diesel and water don't mix the same way since no ethanol is present, but the humid air is still getting into the tanks by the large open vent line with a continual constant exposure. Fuel expands and contracts with temp change, so the tank is breathing. The bacteria will grow at the interface of water and diesel.
sdowney717 is offline   Reply With Quote
Old 07-25-2018, 05:48 AM   #12
Senior Member
 
Conall63's Avatar
 
City: Ft Myers, Florida
Country: USA
Vessel Name: Homegrown
Vessel Model: Roberts TY 43
Join Date: Apr 2014
Posts: 207
Looks like a wad of crud.


Conall
Conall63 is offline   Reply With Quote
Old 07-30-2018, 12:59 PM   #13
Senior Member
 
City: Jacksonville Fla
Country: USA
Vessel Name: The Office
Vessel Model: Marine Trader
Join Date: Oct 2013
Posts: 161
https://photos.google.com/photo/AF1Q...lccpua7Ii5Hh_8
Autoteacher is offline   Reply With Quote
Old 07-30-2018, 01:06 PM   #14
Guru
 
High Wire's Avatar
 
City: Cape May, NJ and Englewood, FL
Country: USA
Vessel Name: Irish Lady
Join Date: Dec 2007
Posts: 2,130
Quote:
Originally Posted by Autoteacher View Post
Google wants me to sign in.
__________________
Archie
1984 Monk 36 Hull #46
Englewood, FL and Cape May, NJ
High Wire is online now   Reply With Quote
Old 07-30-2018, 06:46 PM   #15
Newbie
 
Join Date: Jul 2011
Posts: 2
Biobor crud

Polished x 3, still had engine failure from clogged fuel line. Emptied tank, found large clear crystals, some size of small fingernail! Dissolved in water, not acetone. Added 30 gallons water to tank, let it rock at dock overnight and then pumped it out. Wiped tank dry, fueled and no more crystals. They were large enough to block the uptake line. Boat had been on lift maybe four years. Last polisher got some smaller crystals, saved them for me, remarked that he had never seen anything like them.
halfmoon is offline   Reply With Quote
Old 07-30-2018, 07:05 PM   #16
Guru
 
boatpoker's Avatar
 
City: Port Credit
Country: Ontario
Vessel Name: DIRT FREE
Vessel Model: Benford Fantail 38
Join Date: Sep 2012
Posts: 2,082
Sounds like salt crystals from urine .... sure you got the right tank
__________________
If you can live with the consequences, go for it - wg
Y'am what y'am an' thats' all that y'am - Popeye
I had an allergic reality - Jillie the Bean
boatpoker is offline   Reply With Quote
Old 07-30-2018, 07:43 PM   #17
Newbie
 
Join Date: Jul 2011
Posts: 2
Correct tank?

I'm sure my Albin 28 did not have a 120 gallon holding tank. AND my olfactory sensitivity assured me that the tank held diesel fuel.
__________________

halfmoon is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 02:43 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012