Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 03-12-2010, 18:08   #1
Registered User

Join Date: Sep 2010
Location: San Francisco, CA
Boat: 1980 Pearson 323 - 34ft LOA
Posts: 228
Primary Path Problem (Fuel Filters)

Ok, In the image (below) is the setup I have inherited on my boat. I first observed the system with all 3 valves open. Instructions on the boat say "open 2 & 3" or "open 1". I currently have only "1" open because the mechanic suggested that the pump should not have to or would not like to pull fuel through two filters.

I have read that (and mechanic suggested) that the plumbing should allow one or the other filter so they can be switch while the engine is running. So the questions are...

1: Is it ok to go through two filters and then switch to only the second one when the first is dirty?

2: Should I re-plumb to be able to toggle between filters? (so I can switch filters while the engine is running)

3: Is there something in the current setup that I'm missing? (because the owner (few owners back) who did most of the work on this boat seemed to know a lot and did a lot of nice mods)

4: Is there another way altogether in your opinion?

thank you much,
theway is offline   Reply With Quote
Old 03-12-2010, 19:20   #2
Registered User

Join Date: Feb 2009
Posts: 1,751
You should be able to pull tru each filter indiviually or how will you know when one is clogged?
motion30 is offline   Reply With Quote
Old 04-12-2010, 03:28   #3
noelex 77's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: Full time cruising. Currently in the Med.
Boat: Aluminium yacht
Posts: 10,008
Some owners use 2 primary filters in series a coarse one say 30 microns and a fine one say 10 or 2 microns. This may have been the thinking behind the original pluming.
Is the secondary fuel filter on the engine hard to get at and change? This is often the incentive for this type of set up. The finer primary fuel filter means the engine mounted secondary filter is redundant and should rarely need changing.

A better use of 2 primary filters IMHO is to keep them both 10 micron and be able to switch between the 2. So if 1 clogs you can keep the engine running. This would require a change in pluming.
noelex 77 is offline   Reply With Quote


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
Racor Gasoline Fuel Filters: Why Not for Diesel ? svstrider Engines and Propulsion Systems 5 11-02-2010 17:47
Gulf Coast Fuel Filters hanschristian38 Engines and Propulsion Systems 1 26-11-2009 20:25
newbee question? fuel filters beetlejuice30 Engines and Propulsion Systems 14 12-02-2009 13:12
fuel filters are fuel filters? Jack Long Engines and Propulsion Systems 17 08-09-2008 18:44
Tell me about my primary fuel filter theonecalledtom Construction, Maintenance & Refit 8 31-03-2008 17:30

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 22:52.

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.