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Nick(at)Scholtes1.com
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 Posted: Mon Jan 29, 2007 9:08 am Post subject: Fuel System Questions |
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Guys,
I just bought a KitFox, and I'm going through and
checking/cleaning/maintaining everything that I can before spring.
--How do you clean/remove/maintain the "finger filters" in the tank?
-- On the gascolator, is there supposed to be a filter screen in there?
Mine is just an empty can. The gascolator on my tractors is a glass
"sump", but it also has a filter screen on the top.
Thanks!
Nick
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Beemer
Joined: 26 Aug 2006
Posts: 87
Location: Middle Georgia
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| Posted: Mon Jan 29, 2007 10:39 am Post subject: Fuel System Questions |
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Hi Nick,
I had this exact issue on my original gascolator when I bought my plane.
Aircraft Spruce (probably other, as well) has the screens for a few $. I
replaced it, and then never used it.
If you check around, you'll find you want a 100 Micron filter (maximum) in
your system. This will stop anything above the diameter of a human hair
(about 90 microns at their largest). If you're running fuel injection,
you'll need a 10 micron filter prior to the injector.
No issue with the gascolator screens or most other filters, but most are not
marked with any rating at all, so be careful when shopping around.
Bradley
--
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_________________
Beemer
KF2 (and now an M3!)
Suzuki G10 three-banger
Middle Georgia |
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Clem Nichols
Joined: 10 Jan 2006
Posts: 88
Location: Munfordville, Ky
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| Posted: Mon Jan 29, 2007 1:33 pm Post subject: Fuel System Questions |
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Nick:
I can't speak regarding the filters in the wing tanks. I've wondered the
same thing myself. Regarding the gascolator, the screen is up inside the
top part rather than in the removable bowl portion. At least it was on my
Fox.
Clem Nichols
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msm_9949(at)yahoo.com
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| Posted: Mon Jan 29, 2007 2:45 pm Post subject: Fuel System Questions |
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Hi Nick.
On my Fox, those finger strainers just screw out of the boss glued to the tank. Mesh on those is big enough to catch dead mice but not much else. As for the gascolator, if its the ACS homebuilder's model, screen (very fine mesh) is in the top, not the removeable bowl. I have the Pureolator glass filters in each line from tank to header. They catch everything (hopefully) that gets past the finger strainers.
Nick Scholtes <Nick(at)Scholtes1.com> wrote:
[quote]--> Kitfox-List message posted by: Nick Scholtes
Guys,
I just bought a KitFox, and I'm going through and
checking/cleaning/maintaining everything that I can before spring.
--How do you clean/remove/maintain the "finger filters" in the tank?
-- On the gascolator, is there supposed to be a Don't get soaked. Take a[url= http://tools.search.yahoo.com/shortcuts/?fr=oni_on_mail&#news] quick peak at the forecast [/url]
with the[url= http://tools.search.yahoo.com/shortcuts/?fr=oni_on_mail&#news]Yahoo! Search weather shortcut.[/url] [quote][b]
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Guy Buchanan
Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA
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| Posted: Mon Jan 29, 2007 8:23 pm Post subject: Fuel System Questions |
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At 09:04 AM 1/29/2007, you wrote:
| Quote: | --How do you clean/remove/maintain the "finger filters" in the tank?
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Mine are 3/8 NPT brass threaded into the fiberglass tank. I remove them,
clean them, carefully clean the threads in the tank with a tap, carefully
clean the threads on the filter with a die, then re-install them with two
part polysulfide sealant.
If possible, I recommend installing permanent brass adapters in the tank,
so the finger strainers can be taken out easily and repeatedly without
ruining the tank threads. I wish I had.
Guy Buchanan
K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.
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_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too. |
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Fox5flyer
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| Posted: Tue Jan 30, 2007 4:50 am Post subject: Fuel System Questions |
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Guy, do you have a brand name and number for the polysulphide sealer? Why
is it better than other sealers?
Deke
| Quote: |
At 09:04 AM 1/29/2007, you wrote:
>--How do you clean/remove/maintain the "finger filters" in the tank?
Mine are 3/8 NPT brass threaded into the fiberglass tank. I remove them,
clean them, carefully clean the threads in the tank with a tap, carefully
clean the threads on the filter with a die, then re-install them with two
part polysulfide sealant.
If possible, I recommend installing permanent brass adapters in the tank,
so the finger strainers can be taken out easily and repeatedly without
ruining the tank threads. I wish I had.
Guy Buchanan
K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.
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lcfitt(at)sbcglobal.net
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| Posted: Tue Jan 30, 2007 8:39 am Post subject: Fuel System Questions |
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The only thing I remember reported regarding the gascolator and filter was
on a (I think recently complsted) Kitfox where the engine would run for a
while than stop. It would run and stop again when started again.
What the builder found was fine glass fibers that would clog the filter then
after engine shut down the fibers would drop to the bottom of the bowl, only
to start moving in the fuel and eventually clog the filter once again after
the fuel began to flow again.
In my opinion, this is an interesting subject for argument and scenarios can
be brought up strongly supporting both sides. I don't believe there is
overwhelming evidence for either side though. I guess this why the subject
comes up from time to time just like the rib stitching discussion.
Lowell
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lcfitt(at)sbcglobal.net
Guest
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| Posted: Tue Jan 30, 2007 8:53 am Post subject: Fuel System Questions |
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A note on finger strainers.
I remember the first discussion came up after one of the first Alaska group
had a sheet of Kreem come loose from his tank and cover the finger strainer.
Yep, it caused a lengthy discussion on the Kreem coating as well.
I believe there were a number of people that removed their finger strainers
due the discussion and abundance of opinion. My experience was during an
annual inspection where I had folded back the wing and removed the finger
strainer for inspection. I have never found anything in the screens
themselves. What I did find was a piece of jagged rubber about the size of
a pinto bean lying along side the tank opening. I fished it out and decided
that it was a piece of fuel line that got into my tank from a fueling system
at one of the FBOs I visited during a cross country. My guess is that it
was a crap generated during periodic maintenance of the facility. The
important thing here is that with the finger strainer this "dead mouse" was
not a problem. Had I not had it in place, the "dead mouse" was the perfict
size to get into the fuel outlet and shut down the flow from that tank.
I know I had not introduced this piece of rubber because I always use a Mr.
Funnel while fueling at home.
I guess this is to suggest that we think outside of the box sometimes.
Micro sized filters are fine down stream, but can be troublesome if that is
all there is.
Lowell
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