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912 fuel return line

 
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clemwehner



Joined: 02 Feb 2009
Posts: 32

PostPosted: Wed Feb 24, 2016 6:18 pm    Post subject: 912 fuel return line Reply with quote

In finishing up my KFIV after 24 years of building, I noticed that the more recent Rotax 912 installation manuals call for a fuel line running from the fuel manifold or "Y" on the engine, through a restrictor then back to the fuel tank. I've been told this is to help prevent vapor lock.

1. Is that the way you guys have set up your fuel system?
2. Should this return line go to the wing tanks or to the header tank?

thanks for your help,
Clem Wehner
KFIV- 912, # 1461 (24 years building and almost done)
Lawton, OK


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Clem
Oklahoma
Kitfox IV-912, under construction since 1991
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Guy Buchanan
Site Admin


Joined: 16 Jul 2006
Posts: 1193
Location: Ramona, CA

PostPosted: Wed Feb 24, 2016 6:58 pm    Post subject: 912 fuel return line Reply with quote

On 2/24/2016 6:17 PM, clemwehner(at)sbcglobal.net (clemwehner(at)sbcglobal.net) wrote:

Quote:
1. Is that the way you guys have set up your fuel system? 
No. I ignored it. Most Kitfoxes do.
Quote:
2. Should this return line go to the wing tanks or to the header tank?
I think it's supposed to go to a place with minimal back pressure, thus the wing tank.


Guy Buchanan
Ramona, CA
Kitfox IV-1200 / 912-S / Warp 3cs / 500 hrs. flying again.
Now a glider pilot, too.


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Guy Buchanan
K-IV 1200 / 912Uls / Warp / 500 hours and flying again.
Now a glider pilot too.
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Jim Shumaker



Joined: 09 Jan 2006
Posts: 105

PostPosted: Sun Feb 28, 2016 7:49 am    Post subject: 912 fuel return line Reply with quote

Guy is correct, ignored by most, in fact it was not even in the design 24 years ago.
Jim Shumaker
Kitfox III/912ul/warp/1200 hours
Now a Citabria pilot.

On Wednesday, February 24, 2016 7:06 PM, Guy Buchanan <gebuchanan(at)cox.net> wrote:



On 2/24/2016 6:17 PM, clemwehner(at)sbcglobal.net (clemwehner(at)sbcglobal.net) wrote:

Quote:
1. Is that the way you guys have set up your fuel system?
No. I ignored it. Most Kitfoxes do.
Quote:
2. Should this return line go to the wing tanks or to the header tank?
I think it's supposed to go to a place with minimal back pressure, thus the wing tank.


Guy Buchanan
Ramona, CA
Kitfox IV-1200 / 912-S / Warp 3cs / 500 hrs. flying again.
Now a glider pilot, too.


- The Matronics Kitfox-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

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Jim Shumaker
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