Thread Tools Display Modes
Old 06-03-2017, 08:27 PM   #61
Comodave's Avatar
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 1,092
Thanks, I will check it out.

Comodave is offline   Reply With Quote
Old 06-05-2017, 11:32 AM   #62
Senior Member
greatpapabear's Avatar
City: Beaucette Marina
Country: Guernsey
Vessel Name: Play d'eau
Vessel Model: Fleming 55
Join Date: Jun 2008
Posts: 131
Hi Kurt,

Let's assume you've resolved your water ingress problem and turn to fuel polishing.

Remember that your engines are probably the best polishing systems and are already on board. Excess fuel drawn by the engine fuel pumps will have already been filtered before being returned to the tanks.

Real polishing is where any water, diesel bug and debris that's settled on the bottom of a tank is removed. This takes knowledgeable pipe installation and powerful pumping to stir everything up before being drawn off, filtered and returned, polished. BTW, a centrifuge filter is by far the best but many use Racor filters.

Hence, the method of piping and pumping is absolutely crucial and something which is often overlooked by the sellers and installers of polishing systems.

To be effective, you want the outflow from the polisher to be powerful and aimed at the bottom of the tank to create a real stir. The draw should be about halfway up the tank.

Given time, all the muck your engines and common polishing systems you can buy cannot reach, will have been polished.


Follow our great adventures:
greatpapabear is offline   Reply With Quote
Old 06-05-2017, 11:43 AM   #63
FF's Avatar
Join Date: Oct 2007
Posts: 16,813
"Excess fuel drawn by the engine fuel pumps will have already been filtered before being returned to the tanks."

With some engines , yes , with others the fuel return is simply internal pump leaks , a teaspoon or two an hour.

The real solution is a Marine Fuel tank, with a sump that can be bailed or drained , instead of a low cost box of fuel.

The design was well known 80+ years ago.

Opening a fuel box and scraping the gunk works better than a spray and a hope , as baffles can defeat much of the spray.

" BTW, a centrifuge filter is by far the best."

The centrifuge needs intake piping larger than the biggest chunks in the fuel box.
FF is offline   Reply With Quote
Old 06-05-2017, 12:01 PM   #64
C lectric's Avatar
City: B.C.
Country: Canada
Vessel Name: Island Pride
Vessel Model: Palmer sedan 32'
Join Date: Oct 2007
Posts: 1,970
1982 Grand Banks will most likely have the Ford Lehman which does not return much fuel at all. The engines themselves will not do it.
Separate system is better or modify the tanks with a drain port. It will tell you if contamination is present although it may not be able to get it all. If low enough the contamination can be detected before it reaches the engine fuel pickup if checked often enough.
Most of us do well with GOOD and adequate filtering. A single Racor may be good enough or not good enough. But with some care & thought you can be well protected.

Go to Seaboard Marine and read his suggestions. and learn. Even Tony points out you do not have to junk what you have but modify to substantially improve
what you have. He has the experience to know better than most of us.

C lectric is offline   Reply With Quote

Thread Tools
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 11:46 AM.

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