My fuel filter is about even with the middle of the tank. My vacuum
gauge sits right on 0 usually. The Racor gauge has the yellow zone at 7
inches and the red zone at 10 inches.
Joe
Coquina
On 5/25/2020 12:14 AM, Josh Muckley via CnC-List wrote:
Wade,
Look at the picture of a 500 series racor in the link below. The
factory top has a t handle which is used to tighten the lid. The
vacuum gauge which Joe linked replaces that t-handle. The t arms are
not used to sense pressure - just for tightening the lid.
https://www.ebay.com/itm/172954061164
BTW: these 500 series are notorious for being easily over tightened
which warps the lid and causes leaks.
The 500 series is 60gph which would be close to 60 times the flow
capacity required for any one of our engines. Even with a 2 micron
filter I would not expect much if any vacuum being formed, though it
should be noted that the vacuum represents the effort required to
"lift" the fuel out of the tank AND the effort required to suck the
fuel through the filter. Yanmar typically rates their engines for up
to 10 feet of lift. Diesel is 34" per psi so 10 feet = ~3.5 psi. Even
with no filter element installed the vacuum for 10 feet of vertical
lift of diesel fuel would amount to 100 inH2O, 3.5psia or 7 inHg.
Josh Muckley
S/V Sea Hawk
1989 C&C 37+
Solomons, MD
On Sun, May 24, 2020, 23:03 Wade Glew via CnC-List
<cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> wrote:
Hi Joe
Looking at the guage you've linked to, its obvious the "T" arms go
in the fuel line between the Racor and engine. Where does the
threaded base of the T go? What is a normal pressure? What
pressure reading makes you decide to change filters? Are the
lined just clamped with small hose clamps or what?
Wade
Oh Boy 33-2
On Sun, May 24, 2020, 17:15 Joe Della Barba via CnC-List,
<cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> wrote:
A vacuum gauge is one of the best cost/benefit ratio
improvements you can do. You can save a lot of $$$ in unneeded
filter changes and get advanced warning when you do need to
change one.
Be official:
https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=racor+gauge&_sacat=0
Cockpit mount with light:
https://moyermarine.com/product/vacuum-gauge-kit-gaug_07-1_532/
(also can be used for manifold vacuum)
Cheap:
https://www.ebay.com/itm/2-1-2-Vacuum-Gauge-Chrome-Plated-Steel-Case-1-4-NPT-Lower-Mnt-30-inHg-0/183642544745?hash=item2ac1f2da69:g:2gUAAOSwJiBcQOWz
https://www.ebay.com/itm/LIQUID-FILLED-VACUUM-GAUGE-30-0-PSI-2-5-FACE-1-4-NPT-LOWER-MOUNT-WOG/192746480989?hash=item2ce095e55d:g:RiQAAOSwqoxcBW9S
Joe Coquina C&C 35 MK I
On 5/24/2020 3:39 PM, bwhitmore via CnC-List wrote:
Time and again I have read that Yanmar does not recommend a
2/3 micron primary filter. I therefore use a 10 micron, and
use Biobar, as well as some Seafoam. I have some old crud
in my tank, but where I can see it through the hole for the
sender, the bits I can see are pretty well stuck to the
bottom of the tank (and there are not many of them). That
said, the boat had sat at the dock for +/- 6 years before I
got her, and we have run 150 gallons or so of fuel through
the boat in the last 4 years.
I change my Racor every year, and I used to change the one on
the engine every year as well. This time, I'm going to let
the engine mounted one go another year. We still get a fine
layer of black "grit" at the bottom of the racor over the
year, but it does not appear to hinder the running of the
engine.
I'd rather swap out a $20 filter once a year than risk the
engine shutting down as I go through a bridge opening with 3
kts. of current.
To each their own,
Bruce
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Each and every one is greatly appreciated. If you want to support
the list - use PayPal to send contribution --
https://www.paypal.me/stumurray
_______________________________________________
Thanks everyone for supporting this list with your contributions. Each and
every one is greatly appreciated. If you want to support the list - use PayPal
to send contribution -- https://www.paypal.me/stumurray
_______________________________________________
Thanks everyone for supporting this list with your contributions. Each and
every one is greatly appreciated. If you want to support the list - use PayPal
to send contribution -- https://www.paypal.me/stumurray
