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Carby leak

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rosestar(at)sonic.net
Guest

Posted: Mon Apr 27, 2009 10:47 pm Post subject: Carby leak

I noticed a leak from my carby last night after a 1-hour sunset flight.  

The gas dripped from the bottom of the float chamber.  Today it was 

dry.  I inspected all lines and connections with the fuel pump on.  

Nothing leaked except the float chamber.  It is not a flowing leak.  

Just wet enough to cause a drip every two minutes.  Kinda like 

condensation on the side of a cold beer can on a hot day.  The drip 

stops after about 10 minutes.  So, after the drip stopped I dried the 

side of the chamber and started the motor without the fuel pump on.  

Same result.  A leak and drip on the side of the float chamber.  Any 

ideas on how to stop the leak, or what is causing the problem? I would 

like to take it to Jabiru's distributor for a look, but I am hesitant to 

fly with a gas leak of any kind.  Even a slow leak.  Thanks for any help.



Brad DeMeo

Zodiac XL

N601BD

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plus2s

Joined: 30 Nov 2006
Posts: 65
Location: NEW ZEALAND

Posted: Tue Apr 28, 2009 1:51 am Post subject: Carby leak

Hi Brad

  

 There is a cork gasket between the carb and the float bowl. Drop the float bowl and check the gasket doesn't have a twist in it. And check the float level at the same time.

  

 Regards

 Keith

 J160



--- On Tue, 28/4/09, Rosalie <rosestar(at)sonic.net> wrote:



  	  Quote: 	
		  From: Rosalie <rosestar(at)sonic.net>

Subject: Carby leak

To: jabiruengine-list(at)matronics.com

Received: Tuesday, 28 April, 2009, 6:45 PM



 	  Quote: 	
		  --> JabiruEngine-List message posted by: Rosalie <rosestar(at)sonic.net>



I noticed a leak from my carby last night after a 1-hour sunset flight.  The

gas dripped from the bottom of the float chamber.  Today it was dry.  I

inspected all lines and connections with the fuel pump on.  Nothing leaked

except the float chamber.  It is not a flowing leak.  Just wet enough to cause a

drip every two minutes.  Kinda like condensation on the side of a cold beer can

on a hot day.  The drip stops after about 10 minutes.  So, after the drip

stopped I dried the side of the chamber and started the motor without the fuel

pump on.  Same result.  A leak and drip on the side of the float chamber.  Any

ideas on how to stop the leak, or what is causing the problem? I would like to

take it to Jabiru's distributor for a look, but I am hesitant to fly with a

gas leak of any kind.  Even a slow leak.  Thanks for any help.



Brad DeMeo

Zodiac XL

N601BD





	
	
  [quote][b]

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Lynn Matteson

Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

Posted: Tue Apr 28, 2009 5:24 am Post subject: Carby leak

And while you're dropping the float bowl, do it carefully so that you  

can see just what the fuel level is. After you have the bowl off, go  

one step further and remove the float and needle and see if there's  

any VERY small object on the needle or the seat that could be causing  

the drip, then reinstall.



Lynn Matteson

Kitfox IV Speedster, taildragger

Jabiru 2200, #2062, 635.2 hrs

Sensenich 62x46

Electroair direct-fire ignition system

Status: flying





On Apr 28, 2009, at 5:50 AM, Keith Pickford wrote:



 	  Quote: 	
		   Hi Brad



 There is a cork gasket between the carb and the float bowl. Drop  

 the float bowl and check the gasket doesn't have a twist in it. And  

 check the float level at the same time.



 Regards

 Keith

 J160



 --- On Tue, 28/4/09, Rosalie <rosestar(at)sonic.net> wrote:

 From: Rosalie <rosestar(at)sonic.net>

 Subject: Carby leak

 To: jabiruengine-list(at)matronics.com

 Received: Tuesday, 28 April, 2009, 6:45 PM



 

 <rosestar(at)sonic.net> I noticed a leak from my carby last night  

 after a 1-hour sunset flight. The gas dripped from the bottom of  

 the float chamber. Today it was dry. I inspected all lines and  

 connections with the fuel pump on. Nothing leaked except the float  

 chamber. It is not a flowing leak. Just wet enough to cause a drip  

 every two minutes. Kinda like condensation on the side of a cold  

 beer can on a hot day. The drip stops after about 10 minutes. So,  

 after the drip stopped I dried the side of the chamber and started  

 the motor without the fuel pump on. Same result. A leak and drip on  

 the side of the float chamber. Any ideas on how to stop the leak,  

 or what is causing the problem? I would like to take it to Jabiru's  

 distributor for a look, but I am hesitant to fly with a gas leak of  

 any kind. Even a slow leak. Thanks for any help. Brad DeMeo Zodiac  

 XL N601BD

 www.matronics.com/contribution _- 

 ============================================================

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_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

zeprep251(at)aol.com
Guest

Posted: Tue Apr 28, 2009 6:08 am Post subject: Carby leak

It doesn't take much to cause a too high float level.Any foreign material that can get stuck between the needle and the seat will do it.But the fix is just as easy.Drop the float bowl,that allows the needle to hang clear of the seat,put a rag under the carb to catch the fuel,and switch the electric pump on and then off ,That should flush any foreign material out of the contact area between the needle and seat.You can do the same thing without removing the float bowl IF you have a fuel shut off valve.Shut it off,run the engine until it quits then turn on the fuel again.

          G Aman 2200A

 

   

 

   

 

 --

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Lynn Matteson

Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

Posted: Tue Apr 28, 2009 7:49 am Post subject: Carby leak

Good idea for flushing out the debris, but if the float bowl is left  

on, the debris will be left inside the bowl, and could cause further,  

or different problems.



Lynn Matteson

Kitfox IV Speedster, taildragger

Jabiru 2200, #2062, 635.2 hrs

Sensenich 62x46

Electroair direct-fire ignition system

Status: flying





On Apr 28, 2009, at 10:07 AM, zeprep251(at)aol.com wrote:



[quote] It doesn't take much to cause a too high float level.Any foreign  

 material that can get stuck between the needle and the seat will do  

 it.But the fix is just as easy.Drop the float bowl,that allows the  

 needle to hang clear of the seat,put a rag under the carb to catch  

 the fuel,and switch the electric pump on and then off ,That should  

 flush any foreign material out of the contact area between the  

 needle and seat.You can do the same thing without removing the  

 float bowl IF you have a fuel shut off valve.Shut it off,run the  

 engine until it quits then turn on the fuel again.

          G Aman 2200A

 --

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_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

rosestar(at)sonic.net
Guest

Posted: Wed Apr 29, 2009 7:03 am Post subject: Carby Leak

Thanks for the help, everyone.  I'll get to it tomorrow evening. 



Brad DeMeo

N601BD

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rosestar(at)sonic.net
Guest

Posted: Thu Apr 30, 2009 6:41 pm Post subject: Carby Leak

Alleluiah!  Thanks for for the advice gang.  I did as advised and the 

carby leak is gone!  You folks are the best. 



Brad DeMeo

N601BD

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