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912S Rough running problems

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kerryskyring(at)hotmail.c
Guest

Posted: Wed Mar 01, 2006 5:52 am Post subject: 912S Rough running problems

Turning to the list for some help. Have just had a call from the airfield 

where I am told our beautiful S5 912S has had air under its wings for the 

first time. Just low runs along the runway. I am tied to my desk so can't be 

there.



I will try and explain the problem as it was explained to me (in German) and 

see if anyone has some ideas that might quickly lead us to the problem.



Engine seems to run fine until the auxiliary Facet electric fuel pump is 

turned on when it appears to become over rich and run rough. But it doesn't 

happen immediately, just by the end of a high speed run along the runway. 

Fuel system is according to plans apart from the Facet pump near the header 

tank. Thoughts are..



1. the return fuel line to the header tank may be restrictive . i.e. not 

large enough outlet

2. Just too much fuel pressure.



Any thoughts on what we should look for?



Kerry

Kitfox builders helper

And yes I am excited about the approaching first flight and will post 

details when it happens.



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jdmcbean(at)cableone.net
Guest

Posted: Wed Mar 01, 2006 8:19 am Post subject: 912S Rough running problems

Kerry,

	Turn off the pump..  It is not a required item on the 912S. If the

mechanical pump failed then I may try it.. only if needed..



Fly Safe !!

John & Debra McBean

www.sportplanellc.com

"The Sky is not the Limit...  It's a Playground"



--

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kerryskyring(at)hotmail.c
Guest

Posted: Wed Mar 01, 2006 2:03 pm Post subject: 912S Rough running problems

Thanks John. Was my first thought too but I am not there with the plane. We 

have some pretty experienced Rotax people around the airfield so will keep 

you posted on what happens. kerry.



[quote]Kerry,

	Turn off the pump..  It is not a required item on the 912S. If the

mechanical pump failed then I may try it.. only if needed..



Fly Safe !!

John & Debra McBean

www.sportplanellc.com

"The Sky is not the Limit...  It's a Playground"



--

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Jim Shumaker

Joined: 09 Jan 2006
Posts: 106

Posted: Wed Mar 01, 2006 9:45 pm Post subject: 912S Rough running problems

Kerry

   

  I have a 912 and had a flooding problem.  An automotive pressure regulator after the pump was effective.  But I also had a float level problem.  The high level in the bowl  lowers the pressure that holds the stoppers in place.  Adjusting the float level may be in order. 

   

  Jim Shumaker

   

  

Kerry Skyring <kerryskyring(at)hotmail.com> wrote:

  



Thanks John. Was my first thought too but I am not there with the plane. We 

have some pretty experienced Rotax people around the airfield so will keep 

you posted on what happens. kerry.



[quote]Kerry,

 Turn off the pump.. It is not a required item on the 912S. If the

mechanical pump failed then I may try it.. only if needed..



Fly Safe !!

John & Debra McBean

www.sportplanellc.com

"The Sky is not the Limit... It's a Playground"



--

- 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

_________________
Jim Shumaker

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