Gulf Coast Filter
Happy Thanksgiving to All,
I have some old fuel in the new to us trawler. I have a new Gulf Coast F1
filter
That I was going to build a fuel polishing system per Capt Will, but time is
running
close to get the boat south. My question is what do you think about putting
the F1 and
the Walbro fuel pump before the twin Racor. This is a single Lehman 120.
Thanks in advance to all,
Rich
Plumbing the F1 in-line is a good idea and this has been done on crew boats
and trucks. Not sure whether the pump should go before or after the Racors.
My guess is after, but by looking at some of the websites with truck install
diagrams, you should get the right answer. Be sure to have a vacuum gauge
and to monitor it frequently - especially when it is rough and the stuff
gets stirred-up.
Place the F1 where it is both safe and convenient to change the paper towel
filter medium.
Ron Rogers
-----Original Message-----
From: Rich Pukal
Sent: Thursday, November 26, 2009 1:45 PM
I have some old fuel in the new to us trawler. I have a new Gulf Coast F1
Filter That I was going to build a fuel polishing system per Capt Will, but
time is running close to get the boat south. My question is what do you
think about putting the F1 and the Walbro fuel pump before the twin Racor.
This is a single Lehman 120.
Thanks in advance to all,
Rich
I looked on the Internet and the answer is not apparent. Since this pump
could be used to prime the Racors after changing their filters, it should go
before the Racors. You should check with American Diesel because you also
need to know how much fuel is passed through the engine and returned to the
tank. Your pump needs to be able to meet this total flow requirement.
Ron Rogers
time is running close to get the boat south. My question is what do you
think about putting the F1 and the Walbro fuel pump before the twin Racor.
This is a single Lehman 120.
I think this is a bad idea. If you're worried about your fuel being dirty you
have just added two components that could plug up on your way south. Unless
you plumb in a proper fuel polishing system you will just be pumping dirty
fuel through the screen in the pump and the F-1 and the two Racors. You might
be better served to stock up on Racor filters. The pump should actually be
plumbed after the F-1 so dirty fuel does not reach the pump, but in reality
dirt still does get to the pump screen.
Without the fuel return circuit from the pump to the tank I would be concerned
that the pump would force to much fuel through the engine fuel pump into the
injection pump. Captn Will's Fuel Polishing System is designed to keep a
positive pressure on the engine mechanical fuel pump, not pump fuel through
it. I have such a system and when the mechanical fuel pump failed on the Onan
generator the Walbro pump would force fuel through the dead mechanical fuel
pump and into the injection pump, thus the generator would run. But again, I
have a fuel return line from the pump to the tank so it was just a positive
pressure on the generator pump, not trying to pump 43 gallons per hour
through. The Lehman 120 actually does not return very much fuel to the
tanks.
Also, it takes some time and lots of filter changes to clean up dirty fuel. I
know. It's not something you should try while you are travelling.
Regards,
Andy
Andy Woods
Grand Folly
1970 Grand Banks 36 Classic
Blades, DE.
grandfolly@hotmail.com
I am putting a a walbro pump on my trawler, and plan to load up on
filters. The walbro FRB pump will be pulling fuel from the fuel tanks
integrally located in the bottom of the trawler, thru a duplex filter
system toward the main engine and generator.
Per Depco, there does not need to be a filter between the tanks and
the pump. They strongly discourage it. (The builder had wanted to
install a 70 micron filter at the pump's suction.
So, I am not putting a filter.
The builder recently learned about the Gulf Coast Polishing system
and thought that this should be on board. (I will have some 1400 gal
diesel fuel capacity.) Per Depco, If I run the the walbro 2-3 times a
week thru the current 10 micron duplex fuel filters for about 12
hours per run, I should NOT have any problems. They also suggested
that I do NOT take any long trips on a new fuel load until I have run
the fuel thru the filters for at least 24-36 hours total if I am not
sure about the quality of the fuel being delivered.. They also said
that if i can get the builder to install a day tank, then I do not
need to follow their suggestion.
I am looking into having the builder install a day tank. Per Iveco,
for my engine ("D rated 180 hp N67 MNT M28), this engine circulates
45 liters per hour (~ 12 gph) and can consume up to 64 liters per
hour (~17 gph). Total fuel flow should not exceed 29 gph. The walbro
pump puts at 43 gph fuel flow max. My only concern with a day tank is
if I assume a capacity of 204 gal (27.3 cubic feet) (full throttle
for 12 hours) than I think I need to be worried about the fuel in the
tank being heated up by the returning fuel. (Should I be?)
(I do not envision running full throttle for 12 hours, and due to
space limitations, I thought that capacity was as good as any other
capacity I could dream up. The day tank, if installed, will be
physically above the main engine.)
So, my plans to install the GCF are on hold and will be determined
thru experience.
Our use of the keel cooled, dry exhaust steel trawler: As envisioned,
The Admiral and I plan to move aboard when completed and winter over
somewhere in the Izmir area. If we can, we plan to join the 2010 east
med rally, and then winter over somewhere in the SW portion of
Turkey. 2011 sees us going north toward Istanbul and the Black sea,
and winter over in Istanbul. 2012 has us heading west.
Lee
On Nov 26, 2009, at 2303, Andy Woods wrote:
I think this is a bad idea. If you're worried about your fuel being
dirty you
have just added two components that could plug up on your way south.
Unless
you plumb in a proper fuel polishing system you will just be pumping
dirty
fuel through the screen in the pump and the F-1 and the two Racors...
On Soul Tender I have a dual Racor 500 setup before the primary filter
on my John Deere 4045.
She also has a completely separate Racor 1000 with electric pump that
acts as fuel polishing and clean fuel transfer system. This enables
polishing and/or transfer while under way.
One of the benefits of the dual Racor system is that I can change
filters under way - multiple times if needed - and these filters
protect my engines primary fuel filter making it very unlikely that I
would need to change it in an unscheduled manner.
While a Racor 1000 or Gulf Coast filter has substantially more
capacity than the Racor 500, they could not be changed without
shutting down if placed in the main supply line.
I suppose it could be connected with a bypass that would enable a
change, but what purpose would it serve? The only thing I can think of
is protecting the Racors? Why would that be necessary? What is the
benefit?
While I can't speak to the Gulf Coast system, Racor recommends against
having an active pump in line before the filter as it has the
potential to emulsify any water and render the filter ineffective from
a water separation perspective.
--
Randy Thompson
Soul Tender
KK39007
On Nov 26, 2009, at 1:44 PM, "Rich Pukal" rdpukal@verizon.net wrote:
Happy Thanksgiving to All,
I have some old fuel in the new to us trawler. I have a new Gulf
Coast F1
filter
That I was going to build a fuel polishing system per Capt Will, but
time is
running
close to get the boat south. My question is what do you think about
putting
the F1 and
the Walbro fuel pump before the twin Racor. This is a single Lehman
120.
Thanks in advance to all,
Rich
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F1 before the Racor. Pump not required (but nice if you have the time). Do
not hit the old fuel with biocide or any other additive. Run first and watch
and listen to how the engine runs and what color the exhaust is. If it is
good you are good to go. Check the change in fuel vac over time. Especially
your first hour, next hour, next hour, till you get some confidence of what
is the general condition. If it goes over 10, you are looking at filter
change warning, not an emergency. If you hit it with biocide you are into
misery for many days of very messy work. If you have a problem, get the
tanks and fuel cleaned professionally. Anything less is an invitation to a
surprise underway.
Richard
----- Original Message -----
From: "Rich Pukal" rdpukal@verizon.net
To: trawlers-and-trawlering@lists.samurai.com
Sent: Thursday, November 26, 2009 10:44 AM
Subject: T&T: Gulf Coast Filter
Happy Thanksgiving to All,
I have some old fuel in the new to us trawler. I have a new Gulf Coast F1
filter
That I was going to build a fuel polishing system per Capt Will, but time
is
running
close to get the boat south. My question is what do you think about
putting
the F1 and
the Walbro fuel pump before the twin Racor. This is a single Lehman 120.
Thanks in advance to all,
Rich
http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering
To unsubscribe or modify your subscription options (get password, change
email address, etc) go to:
http://lists.samurai.com/mailman/options/trawlers-and-trawlering
Trawlers & Trawlering and T&T are trademarks of Water World
Productions. Unauthorized use is prohibited.
09:10:00