Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 16-03-2010, 13:09   #16
Moderator Emeritus
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 29,337
Images: 240
For information about nominal and absolute micron ratings, see the Technical Paper

And what the experts say about 2-micron filtres

You could also benefit from reviewing
Fuel Filter Micron Size

The flow rate of a filter is the filters ability to pass a volume of fluid in a given time. Flow rate is affected by the amount of media and the restriction of that media. Generally, a filter that has high efficiency at removing small particles is going to be more restrictive to flow than a filter of the same size with same amount of media that has a lower efficiency at removing small particles.

To increase the flow-rate without sacrificing filter performance, a filter with more media surface area (bigger) may be used. While the media has the same restriction per sq: in., the larger surface area of the media will provide a higher flow rate. An increase in flow-rate can also be accommodated by adding another filter in parallel. Other media types are also available that may provide increased flow without sacrificing filtration performance.

Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"

GordMay is offline   Reply With Quote
Old 16-03-2010, 13:31   #17
Registered User
FloridaWriter's Avatar

Join Date: Jan 2009
Location: Maitland, FL
Boat: Bristol 29
Posts: 230
Be sure the pump location is compatible with the type of filters. There are Racor push filters where the pump is before the filter and there are Racor suction filters where the pump must be after the filters.

"The lookout that first sights the cat shall have ten guineas and remission of sins, short of mutiny, sodomy, or damaging the paintwork." - Jack Aubrey
FloridaWriter is offline   Reply With Quote
Old 16-03-2010, 14:18   #18
Registered User

Join Date: May 2008
Posts: 1,743
Matrix - repeat after me - it works works now....

What you want to do is put a 3 way valve instead of a T connector in the supply line. This will keep the fuel going where you want (and no air coming from somewhere else - a bigger potential problem). Obviously you won't be able to polish and run your engine at the same time.

If you then find the pump isn't up to your polishing needs, then add another pump on the other side of the polishing Racor (suction). I'd recommend a Walbro FRB-13. Pumps about 50 gallons an hour. About $120.

I'd put a 30 micron on the engine primary since Yanmar says so and a 2 micron on the polisher. The quicker the polisher filter clogs the quicker it's gotten the crap out of the fuel. (This isn't quite true. A multistage filter system might save you a little money in filters over the very long term - but you must have something else to worry about )

CarlF is offline   Reply With Quote
Old 16-03-2010, 14:41   #19
Registered User

Join Date: Mar 2010
Posts: 55
Thanks! I got it ... manta repeated!

I am going to follow these guidelines and post a jpeg of my proposed system. Thanks for all the input from everyone.
matrix is offline   Reply With Quote
Old 16-03-2010, 16:49   #20
Registered User
Laidback's Avatar

Join Date: Jun 2007
Posts: 853
Remember, before all else - The fuel in the tank/s, the fuel before one puts it into the tank/s. Filter it as you are filling the tank. Treat the tank's fuel with a biocide if the fuel is going to stand for long periods.
Laidback is offline   Reply With Quote
Old 16-03-2010, 18:13   #21
Senior Cruiser
osirissail's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: A real life Zombie from FL
Boat: Gulfstar 53 - Osiris
Posts: 5,416
Images: 2
Whether you put the aux electric fuel pump between the tank and the filter - or - after the filter is dependent upon the make/model of the fuel filter. Some Racors and others are rated for either suction or positive pressure. Others are strictly suction units which require the aux electric pump between the filter and the engine.
- - The most practical filter system is two parallel filters with valves to isolate one filter or the other from the fuel flow system. That way when one filter clogs you can select the other fuel filter and continue operation while you change the clogged fuel filter.
- - Depending upon the engine sometimes the process of changing the "final" fuel filter mounted on the engine is very difficult so having your auxillary (fuel filter(s) before the engine) loaded with the same micron filter as the "final" filter will save the hassle of changing the engine mounted filter for a considerable length of time.
- - Whether you have dual filters in series is open for discussion as having a 10 mic first filter then a 2 mic secondary filter (matches the engine mounted filter) probably does not do much good whereas having a "switch-over" parallel system facilitates being able to bring on line a fresh clean filter without have to stop the engine and change filters while underway in huge seas and winds or entering a complicated harbor at night.
- - You can purchase dual "switch-over" parallel filter systems already assembled for a large amount of money or just go down to the plumbing store and build your own "switch-over" dual parallel system with some 3-way valves and tee's.

osirissail is offline   Reply With Quote

1gm10, racor, yanmar

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
Dual Racor Design? deano Engines and Propulsion Systems 17 20-06-2014 01:27
Racor Gasoline Fuel Filters: Why Not for Diesel ? svstrider Engines and Propulsion Systems 5 11-02-2010 17:47
DC Generator - Yanmar 1GM10 iain_scott Electrical: Batteries, Generators & Solar 22 07-06-2009 10:42
Racor Filters - Thank You clausont Engines and Propulsion Systems 0 28-09-2008 18:44
Cheap Racor Filters Wildrice Engines and Propulsion Systems 5 30-06-2007 15:30

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 02:15.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.