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Leaky carb

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apatton2

Joined: 17 Jan 2018
Posts: 27

Posted: Sun Jul 08, 2018 8:30 pm Post subject: Leaky carb

Hi All,

I've noticed twice now that my carb (overhauled unit w/ ~50 hrs on it) will leak gas after I land and refuel.



More detail:



ø It seems to leak through the throat of the carb

ø It drips once every 3-5 sec

ø I only have noticed it immediately post-fueling (perhaps it was dripping after shutdown, but I didn't notice)



Today I think it dripped for around 45min after fueling. Weird.



Any thoughts on what could be responsible? When the engine is running I would expect all of this fuel to be sucked into the carb itself. Relative to the amount of fuel an M14 uses this should be trivial.



Many thanks,

Andrew

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_________________
Andrew Patton
Yak-50
San Francisco, CA

dsavarese0812(at)bellsout
Guest

Posted: Mon Jul 09, 2018 3:11 am Post subject: Leaky carb

Call whoever overhauled the carburetor for you and tell them the carb is leaking and ask them to repair it.

Dennis

       From: apatton2 <apatton(at)alumni.princeton.edu>

 To: yak-list(at)matronics.com 

 Sent: Monday, July 9, 2018 12:33 AM

 Subject: Leaky carb

--> Yak-List message posted by: "apatton2" <apatton(at)alumni.princeton.edu (apatton(at)alumni.princeton.edu)>

Hi All,

I've noticed twice now that my carb (overhauled unit w/ ~50 hrs on it) will leak gas after I land and refuel.

More detail:

Ã¸ It seems to leak through the throat of the carb

Ã¸ It drips once every 3-5 sec

Ã¸ I only have noticed it immediately post-fueling (perhaps it was dripping after shutdown, but I didn't notice)

Today I think it dripped for around 45min after fueling. Weird.

Any thoughts on what could be responsible? When the engine is running I would expect all of this fuel to be sucked into the carb itself. Relative to the amount of fuel an M14 uses this should be trivial.

Many thanks,

Andrew

--------

Andrew Patton

Yak-50

San Francisco, CA

Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=481500#481500

http://www.matronics.com/Np;              - MATRONICS WEB FORUMS -

<;  --> http:/nbsp;             - NEW MATRONICS LIST WIKI -matronics.com/" target="_blank">http://wiki.matronics.com

;                   -Matt Draltp://www.matronics.com/contribution" target="_blank">http://www.matronics==

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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:

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richard.goode(at)russiana
Guest

Posted: Mon Jul 09, 2018 3:30 am Post subject: Leaky carb

We overhauled it, and of course stand by it! Normally I would put it down to a faulty membrane, but it was new and therefore most unlikely. But I suspect it is a sticking fuel valve. We will be looking into it.

 

Richard Goode Aerobatics

Rhodds Farm

Lyonshall

Hereford

HR5 3LW

 

Tel:  +44 (0) 1544 340120

Fax: +44 (0) 1544 340129

www.russianaeros.com



 

From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of A. Dennis Savarese

Sent: 09 July 2018 12:11

To: yak-list(at)matronics.com

Subject: Re: Leaky carb

 

Call whoever overhauled the carburetor for you and tell them the carb is leaking and ask them to repair it.



Dennis



 

From: apatton2 <apatton(at)alumni.princeton.edu (apatton(at)alumni.princeton.edu)>

To: yak-list(at)matronics.com (yak-list(at)matronics.com) 

Sent: Monday, July 9, 2018 12:33 AM

Subject: Leaky carb



 

--> Yak-List message posted by: "apatton2" <apatton(at)alumni.princeton.edu (apatton(at)alumni.princeton.edu)>



 



Hi All,



I've noticed twice now that my carb (overhauled unit w/ ~50 hrs on it) will leak gas after I land and refuel.



 



More detail:



 



Ã¸ It seems to leak through the throat of the carb



Ã¸ It drips once every 3-5 sec



Ã¸ I only have noticed it immediately post-fueling (perhaps it was dripping after shutdown, but I didn't notice)



 



Today I think it dripped for around 45min after fueling. Weird.



 



Any thoughts on what could be responsible? When the engine is running I would expect all of this fuel to be sucked into the carb itself. Relative to the amount of fuel an M14 uses this should be trivial.



 



Many thanks,



Andrew



 



--------



Andrew Patton



Yak-50



San Francisco, CA



 



 



 



 



Read this topic online here:



 



http://forums.matronics.com/viewtopic.php?p=481500#481500



 



 



 



 



 

http://www.matronics.com/Np;             - MATRONICS WEB FORUMS -

<; --> http:/nbsp;             - NEW MATRONICS LIST WIKI -matronics.com/" target="_blank">http://wiki.matronics.com



 



;                   -Matt Draltp://www.matronics.com/contribution" target="_blank">http://www.matronics==

- The Matronics Yak-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:

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bwade154(at)yahoo.com
Guest

Posted: Mon Jul 09, 2018 4:27 am Post subject: Leaky carb

Just because I'm a curious kind of guy after it stops leaking and you pressurize the system side with the primer does it start leaking again?

                  

                                                                    On ‎Monday‎, ‎July‎ ‎9‎, ‎2018‎ ‎12‎:‎41‎:‎27‎ ‎AM‎ ‎EDT, apatton2 <apatton(at)alumni.princeton.edu> wrote:                 

                 



                 



                 --> Yak-List message posted by: "apatton2" <apatton(at)alumni.princeton.edu (apatton(at)alumni.princeton.edu)>



Hi All,



I've noticed twice now that my carb (overhauled unit w/ ~50 hrs on it) will leak gas after I land and refuel.



More detail:



Ã¸ It seems to leak through the throat of the carb



Ã¸ It drips once every 3-5 sec



Ã¸ I only have noticed it immediately post-fueling (perhaps it was dripping after shutdown, but I didn't notice)



Today I think it dripped for around 45min after fueling. Weird.



Any thoughts on what could be responsible? When the engine is running I would expect all of this fuel to be sucked into the carb itself. Relative to the amount of fuel an M14 uses this should be trivial.



Many thanks,



Andrew



--------



Andrew Patton



Yak-50



San Francisco, CA



Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=481500#481500







http://forums.sp;           - NEW MATRONICS LIST WIKI -

http://wiki.matronics.com

<==================

- The Matronics Yak-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?Yak-List

apatton2

Joined: 17 Jan 2018
Posts: 27

Posted: Sun Jul 15, 2018 7:04 pm Post subject: Re: Leaky carb

What's interesting is that I tried shutting off the plane today by pulling the fuel shutoff valve several times. The engine dies around 10sec later, but the carb still drips! Was not expecting that.

- The Matronics Yak-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?Yak-List

_________________
Andrew Patton
Yak-50
San Francisco, CA

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