Reply
 
Thread Tools Display Modes
 
Old 04-29-2015, 03:49 PM   #1
Guru
 
roguewave's Avatar
 
City: Hill Country TX/S.Portland Maine
Country: Texas
Vessel Name: Southern Cross III
Vessel Model: 1988 Defever 41
Join Date: Jul 2012
Posts: 610
What micron fuel filters do you use?

I'm flying out to work on and test the boat we bought. I'd like to bring filters with me so I don't have to buy them when I arrive. I have twin cummins 6BTA 5.9's that have a fuel filter on the engine as well as remote mounted racors. The engine filter is a 10 micron and I was wondering if the remote racor should be the same or should I go to the 30 micron.
Thanks
__________________
Advertisement

__________________
..."some gave all, KIA"...
roguewave is offline   Reply With Quote
Old 04-29-2015, 05:27 PM   #2
TF Site Team
 
dwhatty's Avatar
 
City: Home Port: Buck's Harbor, Maine
Country: USA
Vessel Name: "Emily Anne"
Vessel Model: 2001 Island Gypsy 32 Europa (Hull #146)
Join Date: Sep 2008
Posts: 2,733
Most of the boats with Cummins 6BTAs around this area, including ours, use Racor 30 microns.
__________________

__________________
David Hawkins
Deer Isle, Maine
dwhatty is offline   Reply With Quote
Old 04-29-2015, 05:34 PM   #3
Guru
 
roguewave's Avatar
 
City: Hill Country TX/S.Portland Maine
Country: Texas
Vessel Name: Southern Cross III
Vessel Model: 1988 Defever 41
Join Date: Jul 2012
Posts: 610
Thanks David, do you have an engine mounted fuel filter also? Mine has a R24T (24 bucks ea) on the engine and 2010's ($7.59) on the remote racor.
__________________
..."some gave all, KIA"...
roguewave is offline   Reply With Quote
Old 04-29-2015, 06:00 PM   #4
Guru
 
caltexflanc's Avatar
 
City: North Carolina for now
Country: USA
Vessel Name: Small Incentive
Vessel Model: Boston Whaler 130 Sport
Join Date: Aug 2011
Posts: 3,797
Use what the engine manufacturer specifies. "How many microns" can easily turn into an anchor, one vs two, galley up / down. type thread.
__________________
George

"There's the Right Way, the Wrong Way, and what some guy says he's gotten away with"
caltexflanc is offline   Reply With Quote
Old 04-29-2015, 06:15 PM   #5
Guru
 
twistedtree's Avatar
 
City: Gloucester, MA
Country: USA
Join Date: Jan 2013
Posts: 3,193
Quote:
Originally Posted by caltexflanc View Post
Use what the engine manufacturer specifies. "How many microns" can easily turn into an anchor, one vs two, galley up / down. type thread.
Hey, I could use a little distraction from all the recent anchor discussion.
__________________
www.MVTanglewood.com
twistedtree is offline   Reply With Quote
Old 04-29-2015, 06:44 PM   #6
Scraping Paint
 
City: -
Country: -
Join Date: Oct 2007
Posts: 13,748
Quote:
Originally Posted by twistedtree View Post
Hey, I could use a little distraction from all the recent anchor discussion.
Fine. So here's some more distraction for you. We use 2 micron filters on everything fuel-related. If our anchor used a fuel filter, we'd use a 2 micron on it, too.
Marin is offline   Reply With Quote
Old 04-29-2015, 07:12 PM   #7
Guru
 
roguewave's Avatar
 
City: Hill Country TX/S.Portland Maine
Country: Texas
Vessel Name: Southern Cross III
Vessel Model: 1988 Defever 41
Join Date: Jul 2012
Posts: 610
Quote:
Originally Posted by Marin View Post
Fine. So here's some more distraction for you. We use 2 micron filters on everything fuel-related. If our anchor used a fuel filter, we'd use a 2 micron on it, too.
That should stir the pot quite nicely.
__________________
..."some gave all, KIA"...
roguewave is offline   Reply With Quote
Old 04-29-2015, 07:17 PM   #8
Guru
 
Ski in NC's Avatar
 
City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 3,887
I use 10's if fuel tanks are known clean, 30's if tanks are dirty.
Ski in NC is offline   Reply With Quote
Old 04-29-2015, 07:21 PM   #9
Guru
 
N4712's Avatar
 
City: South FL
Country: U.S.A
Vessel Name: Oliver
Vessel Model: Nordhavn 47 Hull# 12
Join Date: Apr 2013
Posts: 3,613
I use 5738987655 micron filters for what it's worth. Also have a 46388373 on my Rocna.
__________________
Thanks, Oliver
M/V Oliver
Nordhavn 47 Hull #12
N4712 is offline   Reply With Quote
Old 04-29-2015, 07:26 PM   #10
TF Site Team
 
dwhatty's Avatar
 
City: Home Port: Buck's Harbor, Maine
Country: USA
Vessel Name: "Emily Anne"
Vessel Model: 2001 Island Gypsy 32 Europa (Hull #146)
Join Date: Sep 2008
Posts: 2,733
Quote:
Originally Posted by roguewave View Post
Thanks David, do you have an engine mounted fuel filter also? Mine has a R24T (24 bucks ea) on the engine and 2010's ($7.59) on the remote racor.
Fleetguard FF5285 on engine. Confusing info as to whether this is a 10 or 20 micron.
__________________
David Hawkins
Deer Isle, Maine
dwhatty is offline   Reply With Quote
Old 04-29-2015, 07:33 PM   #11
Guru
 
twistedtree's Avatar
 
City: Gloucester, MA
Country: USA
Join Date: Jan 2013
Posts: 3,193
Quote:
Originally Posted by Marin View Post
Fine. So here's some more distraction for you. We use 2 micron filters on everything fuel-related. If our anchor used a fuel filter, we'd use a 2 micron on it, too.
Now THAT'S what I'm talking about
__________________
www.MVTanglewood.com
twistedtree is offline   Reply With Quote
Old 04-29-2015, 07:51 PM   #12
Guru
 
psneeld's Avatar
 
City: Avalon, NJ
Country: USA
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 15,903
If my engine used more than 1.9 GPH...I might care....for now..2 micron all around....
psneeld is offline   Reply With Quote
Old 04-29-2015, 08:03 PM   #13
TF Site Team
 
FlyWright's Avatar
 
City: California Delta and SF Bay
Country: Sacramento, CA, USA (boat in Vallejo)
Vessel Name: FlyWright
Vessel Model: Marshall Californian 34 LRC
Join Date: Apr 2008
Posts: 10,179
I see no reason to go larger micron rating than the secondary filter. It makes the secondary's job easier and provides the needed level of filtration for the engine. My old mechanical Perkins 4.236 calls for 2U, so 2U it gets. For me, it's a no brainer. That's what mfr specs are for.

If your engine calls for 10U, use what the mfr recommends. Takes out the guesswork and doubt.
__________________
Al

Custom Google Trawler Forum Search
FlyWright is online now   Reply With Quote
Old 04-29-2015, 09:41 PM   #14
Guru
 
caltexflanc's Avatar
 
City: North Carolina for now
Country: USA
Vessel Name: Small Incentive
Vessel Model: Boston Whaler 130 Sport
Join Date: Aug 2011
Posts: 3,797
Here's a good explanation of why progressive filtration makes sense, and why virtually all engine mfrs. recommend it. Yes the guy is making a case for a product he sells, (and is duplicatable by other vendors and most standard primary/secondary set ups) but it helps explain why you don't want to put a primary filter the same rating as the secondary. By the way, he also explains in the second article why mere micron ratings are not always relevant when comparing one filter to another. Note the quote from the Lugger/Northernlights guy at the end.

Marine Fuel Filtration - “The Seaboard Way”

Fuel Filters

And if you want a more neutral party's opinion, consult Nigel Calder's discussion on fuel filters on page 370 of hs excellent"Boat Owner's Mechanical and Electrical Manual".
__________________
George

"There's the Right Way, the Wrong Way, and what some guy says he's gotten away with"
caltexflanc is offline   Reply With Quote
Old 04-29-2015, 09:51 PM   #15
Master and Commander
 
markpierce's Avatar
 
City: Vallejo CA
Country: USA
Vessel Name: Carquinez Coot
Vessel Model: 2011 Seahorse Marine Coot hull #6
Join Date: Sep 2010
Posts: 10,262
Using two-micron on the engine filters and the filters between engine and fuel tanks, but I've a small collection of ten-micron filters I'm tempted to use on the tanks-to-engine filters.
__________________
Kar-KEEN-ez Koot
markpierce is offline   Reply With Quote
Old 04-30-2015, 06:42 AM   #16
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 16,525
To my mind the question is where are the filters located , how easy is it to swap out the filters.

IF the filters are a bank with a switching lever , installed OUTSIDE the engine room where a filter change is easy , the 2 micron would be first choice.

Even the 2s will pass a percentage of bigger crap, so the 10s on the engine will still need changing , but not as often.

If the filters are buried in the engine room , the use of 30s and the 10 on the engine is usual , with a filter DP (differential pressure) gauge on the dash , you can at least know when to switch over , and change the plugged one.

Remember Otoole sez , "Murphy was an Optimist", so you may have to change filters underway, sometimes frequently.

With 30s first , the 10s will need more frequent changing..
FF is offline   Reply With Quote
Old 04-30-2015, 07:33 AM   #17
Guru
 
ranger42c's Avatar
 
City: Maryland
Country: USA
Vessel Model: 42' Sportfish
Join Date: Aug 2013
Posts: 3,159
Quote:
Originally Posted by roguewave View Post
I'm flying out to work on and test the boat we bought. I'd like to bring filters with me so I don't have to buy them when I arrive. I have twin cummins 6BTA 5.9's that have a fuel filter on the engine as well as remote mounted racors. The engine filter is a 10 micron and I was wondering if the remote racor should be the same or should I go to the 30 micron.
Thanks

Our 6CTA 8.3s want 30 micron elements in the primary filter/fuel-water separators (Racor, in our case), and 10 micron elements in the on-engine spin-on secondary. Latter is the Fleetguard product specified in the service manual for these engines.

-Chris
__________________
South River, Chesapeake Bay
ranger42c is offline   Reply With Quote
Old 04-30-2015, 08:43 AM   #18
RNL
Senior Member
 
RNL's Avatar
 
City: Sitka
Country: USA
Vessel Name: Rob n' Lee
Vessel Model: Kadey Krogen 42' #192
Join Date: Feb 2015
Posts: 108
Same for me with the 2 micron all around

Glen
RNL is offline   Reply With Quote
Old 04-30-2015, 09:37 AM   #19
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 6,369
A few early morning thoughts on this anchor debate type subject --

In our lightly used vessels provided the fuel is reasonably clean to begin with, the "what micron filters to use" discussion seems best answered by "whatever." Once the engines start seeing many hundreds to thousands of hours per year, multi stage sequential fuel filtering is common (30u, 10u and on engine) often coupled with good high volume on board fuel polishing systems.

As often noted by FF and others the higher the volume the better when moving fuel around the tanks and through polishing filters. Once into larger vessels Alfa Laval type centrifugal filters are common. The old DD 2 strokes are wonderful in this regard as they move so much filtered fuel through their recirculation setup, not uncommon to hear of100 gph.

A few years ago a reasonably new Nordhavn 55 spent much of its time sitting at docks. With a combination of bad/wet "new" fuel and low turnover the entire fuel system became green. No amount of polishing or store bought additives would cure this issue so all tanks and systems were emptied and cleaned, thank goodness for sizable tank ports.

I'd venture a guess that most recreational boater fuel problems are from lack of turnover and once the bugs start growing in old fuel the list of issues skyrockets. So on vessels that only have about 50 to 150 hours per year on the engines, this could mean lightly used or maybe lightly abused.

Conflicting advice on how full to leave tanks each fall contributes to the issues. Leaving them full but with 3 or four years of fuel onboard can occur. Or leave them low with only a year or so onboard can lead to condensation say some. Oh what to do?
sunchaser is offline   Reply With Quote
Old 04-30-2015, 10:24 AM   #20
Senior Member
 
City: G
Country: usa
Join Date: Feb 2014
Posts: 142
roguewave
I have same engines. Mine are mechanical injection. Cummins standard filter (on the engine) is 10 micron. I also use 10 micron as a prefilter. You will very soon pass all of your tank's volume through the filters with that engine. If you use 30 or 20 as a prefilter it will soon be doing nothing as the 10 on the engine will have treated everything in the tank.
__________________

stone beach is offline   Reply With Quote
Reply

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 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012