Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 20-12-2011, 13:58   #1
Registered User

Join Date: Jan 2010
Location: Ireland
Boat: Jeanneau Sun Odyssey 409
Posts: 81
Fuel polisher in Sail magazine

A recent Sail magazine had an article on installing a fuel polisher which in the article seemed to be essentially an additional pump which ran on a timer through a primary fuel filter, in the example on the existing fuel line.
Is it not the case that a typical fuel pick-up line is set slightly above the bottom of the fuel tank to minimise picking up sludge? so surely the fuel polisher operating when the boat is at rest is unlikely to actually pick up the contaminated fuel?
__________________

__________________
Srah 1953 is offline   Reply With Quote
Old 20-12-2011, 14:19   #2
Moderator
 
noelex 77's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: Living on dirt waiting for our new yacht to be built.
Boat: Half built Bestevaer.
Posts: 10,619
Re: Fuel polisher in Sail magazine

It will still do some good, particularly when the tank is stirred up following a rough sail, but it is better to have a fuel polishing pick up at the bottom of tank. This is what my boat has, thanks to a sensible original owner, who thought carefully, and practically, about all the on-board systems.
Some fuel tanks can be retrofitted with a low level pick up
__________________

__________________
noelex 77 is offline   Reply With Quote
Old 20-12-2011, 16:30   #3
Marine Service Provider
 
AnchorageGuy's Avatar

Join Date: Mar 2003
Location: Wherever the boat is!
Boat: Marine Trader 34DC
Posts: 4,618
Re: Fuel polisher in Sail magazine

I like to think of these systems as enhanced fuel filtering as opposed to fuel polishing. A true polishing system will have enough pressure from the pump to stir up the tank as the fuel circulates. Any additional filtering will certainly help. Chuck
__________________
Chesapeake Bay, ICW Hampton Roads To Key West, The Gulf Coast, The Bahamas

The Trawler Beach House
Voyages Of Sea Trek
AnchorageGuy is offline   Reply With Quote
Old 21-12-2011, 00:30   #4
Moderator
 
noelex 77's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: Living on dirt waiting for our new yacht to be built.
Boat: Half built Bestevaer.
Posts: 10,619
Re: Fuel polisher in Sail magazine

Quote:
Originally Posted by Waterwayguy View Post
I like to think of these systems as enhanced fuel filtering as opposed to fuel polishing. A true polishing system will have enough pressure from the pump to stir up the tank as the fuel circulates. Any additional filtering will certainly help. Chuck
As you say the two process are different.
Professional fuel polishes use a powerful pump to stir up the tank and ideally move the pickup point around. It is used for a couple of hours as needed perhaps every few years.


Permanent fuel polishing systems typically use a smaller pump, but they are used frequently. Mine is on most days usually for a couple of hours. The lower pressure stirs up the tank less well, but sailing in rough conditions does that better than any pump. The permanent systems filter the fuel many more times because they are on for much longer. They also filter any new fuel or water that gets introduced into the tank.

The actual diesel filtration system used for both systems is very similar.

Overall I think a permanent system has a lot to recommend it and will be superior to a professional system only done occasionally.
Other steps are important ,such as checking the condition of any fuel before you put it into the tank, using a biocide and stopping water.
If your tank is very dirty only draining and physically cleaning it will probably work, but fuel polishing will prevent ( or at least greatly delay) it reaching this state.
There seems to have been an increase in the fuel problems I am noticing, over the last few years, and a permanent fuel polishing system is a great improvement that is often relatively cheap and easy to install.
__________________
noelex 77 is offline   Reply With Quote
Old 21-12-2011, 13:00   #5
Registered User
 
webejammin's Avatar

Join Date: Mar 2011
Location: Pacific NW, sailing the Columbia River, USA
Boat: Gemini 105MC 34 ft hull#753
Posts: 951
Images: 3
Re: Fuel polisher in Sail magazine

Our boat has a fuel polishing system built in as it puts back in the tanks more than it uses after going thru the system and a racor filter. We also remove our fuel tanks yearly and empty the crud and reinstall the tanks it takes about 30 min to do the job if I don't count traveling to where I can poor out the remaining disel in a 5 gal bucket. Our pickup tube does not pickup the last almost 5 gal of disel so letting it settle and poring off the good disel only leaves less than one gal of waste to dispose of. I've only done this once sence we bought our boat one year ago. I usually buy our disel at regular gas stations and don't think I get as much crud that way.
__________________
Wind in my hair and a nice catamaran
Phil & Elaine
webejammin is offline   Reply With Quote
Old 21-12-2011, 13:32   #6
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Re: Fuel polisher in Sail magazine

Quote:
Our boat has a fuel polishing system built in as it puts back in the tanks more than it uses after going thru the system and a racor filter.
That, once again, is not a fuel polishing system.
__________________
DeepFrz is offline   Reply With Quote
Old 22-12-2011, 00:52   #7
Marine Service Provider

Join Date: Oct 2011
Posts: 1,205
Re: Fuel polisher in Sail magazine

Hi all, an on-board fuel polishing system can be had by a DIY, for a little bit cheaper then a store bought, but it can be made more effective, for that same less money.

Lloyd

Here is my fuel delivery system.



Here is my polishing system, it is completely independent of the fuel delivery system.

__________________
FlyingCloud1937 is offline   Reply With Quote
Old 22-12-2011, 07:16   #8
ATC
Marine Service Provider

Join Date: Feb 2011
Location: St Petersburg, FL
Boat: Thompson Trawler, SUITE 44
Posts: 73
Re: Fuel polisher in Sail magazine

Most 'fuel polishers' ONLY clean the fuel while the real demons sleep at the bottom of the tank awaiting your untimely entrance to a dark harbor at night. There is ABSOLUTELY no equal to tank cleaning.
__________________
Absolute,

"Suckin Sludge & Havin a Gas"
ATC is offline   Reply With Quote
Old 22-12-2011, 08:14   #9
Marine Service Provider
 
AnchorageGuy's Avatar

Join Date: Mar 2003
Location: Wherever the boat is!
Boat: Marine Trader 34DC
Posts: 4,618
Re: Fuel polisher in Sail magazine

ATC is absolutely correct. You must begin with a clean tank and add the "enhanced filtering system" to keep the fuel clean. If the tanks are dirty then it is putting a band-aid on the problem. Tank cleaning should be an every five year maintenance chore, or sooner if really fouled fuel is pumped on board. Even using a professional service will only go so far if the tanks are dirty or corroded from the inside. Chuck
__________________
Chesapeake Bay, ICW Hampton Roads To Key West, The Gulf Coast, The Bahamas

The Trawler Beach House
Voyages Of Sea Trek
AnchorageGuy is offline   Reply With Quote
Old 22-12-2011, 08:55   #10
Senior Cruiser
 
Vasco's Avatar

Cruisers Forum Supporter

Join Date: Apr 2004
Location: Toronto
Boat: CS36Merlin, "La Belle Aurore" Ben393 "Breathless"
Posts: 7,135
Re: Fuel polisher in Sail magazine

Had my fuel polished and tank cleaned in Ft. Lauderdale last January after a fast sail across the stream and back when the engine acted up on the other side. The guy who did it usually goes to marinas and I was on a mooring. He had no AC power for his pumps so I cranked up my Honda and we were in business. Pumped out all my fuel into his tanks, polished that fuel through a few filters, opened my tank and used a high pressure wand to get the crud out, checked the whole tank with a little mirror, put the sender back on (this is the hole we used) and filled the tank with clean fuel. For no surprises this should be done every couple of years.
__________________
Rick I
Toronto in summer, Bahamas in winter.
http://groups.yahoo.com/group/beneteau393/
Vasco is offline   Reply With Quote
Old 22-12-2011, 09:05   #11
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,198
A good fuel system starts with the design of the tank(s). What you need is a low point or better, a real sump underneath. Baffles must allow passage of crud and water so that all can accumulate in the sump.

Now you can either make a connection to the bottom of the sump, or from the top of the tank you can install a suction tube that goes all the way down to the bottom of the sump. Do not put a strainer on that suction tube!

My boat was built in the USA where connections underneath are not allowed. Thankfully, Steve Dashew put a plug there, which I could remove to install the connection. A suction tube works too. If either gets clogged, you can blow them through. This would only happen shortly after making this, as the fuel will be clean from that time on.

If you search Google for "Jedi fuel system" you get full info on how to create the ultimate system. I based that design on the system aboard Nordhavn yachts.

cheers,
Nick.
__________________

__________________
s/v Jedi is offline   Reply With Quote
Reply

Tags
fuel, sail

Thread Tools
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
Mahe 36: Rig and Sails kev&jo Fountaine Pajot 368 26-11-2017 11:06
For Sale: Sail - Storm - ATN 150 sq ft Gail Sail svBeBe Classifieds Archive 4 12-01-2012 09:14
Challenge: How Much Extra Fuel and Water Do You Carry on Deck, or Below Decks ? Ocean Roads Challenges 8 10-11-2011 19:24
For Sale: Parasailor 2.0 (67sqm) - Brand New isolamia Classifieds Archive 1 12-08-2011 04:51
Do Not Use Biocide Journeyman Engines and Propulsion Systems 37 24-07-2011 19:47



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:17.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.