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Marvel Shebler leak

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agustafson(at)chartermi.n
Guest

Posted: Fri May 25, 2007 2:50 pm Post subject: Marvel Shebler leak

I have a carb that even with new needle and seat  and new metal float still drips for about 2 or 3 minutes after shutdown. I tried  releasing the pump pressure by draining the sump right away but it still drips  just as bad. It may be affecting the idle mixture also as it does not shut off  the engine at lean cut off. Any help?

  

 Aaron Gustafson

   [quote][b]

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shoskins(at)mchsi.com
Guest

Posted: Sat May 26, 2007 7:14 am Post subject: Marvel Shebler leak

What is the history of the carb?  Is this carb overhauled, or just the needle and seat replaced? Was the work done according to the OH manual?  Was the float clearance checked between the pontoons and the bowl?



Was the clearance between the top of the float and the bowl gasket checked? 



How about some more info?



Sam Hoskins

Quickie Q-200

Murphysboro, IL



On 5/25/07, Aaron Gustafson < agustafson(at)chartermi.net (agustafson(at)chartermi.net)> wrote:[quote]       I have a carb that even with new needle and seat  and new metal float still drips for about 2 or 3 minutes after shutdown. I tried  releasing the pump pressure by draining the sump right away but it still drips  just as bad. It may be affecting the idle mixture also as it does not shut off  the engine at lean cut off. Any help?

  

 Aaron Gustafson

   [quote][b]  http://www.matronics.com/Navigator?Continental-List http://forums.matronics.com 

www.MistakeProofing.net/blog/

618-967-0016 ph.

312-212-4086  fax  [quote][b]

- The Matronics Continental-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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agustafson(at)chartermi.n
Guest

Posted: Sun May 27, 2007 4:46 am Post subject: Marvel Shebler leak

Thanks for the replies to this problem. I think I  may have it fixed. It was a junk yard carb (Wentworth). I replaced the float  (metal) and installed one piece venturi and needle and seat. After taking it  apart for the 3rd time and checking all carefully, the bail wire may have been  on the opposite side and there was no gasket on the emulsion tube. Yes the  needle to float clearance was right and all the bailwire adjustments were  correct. 

 Now I just have a small amount of gas in the bottom  of the airbox but no drips. I assume this is OK per reading of others  experiences. Does this sound normal? It is on an 0-200.

  

 Aaron Gustafson

   [quote][b]

- The Matronics Continental-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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shoskins(at)mchsi.com
Guest

Posted: Sun May 27, 2007 6:18 am Post subject: Marvel Shebler leak

It sounds like it is better, but still not fixed.  You may not have enough torque on the seat and you may be getting seepage through the threads.  There is a special tool for that and it works much better than trying to do it with a big screwdriver. Were you sure to use the gasket under the seat?  



Regarding the gasket on the discharge nozzle (you called it an emulsion tube?), why was it missing?  It can be very hard to see, down in the body of the bowl.



For more opinions, you might also consider joining this O-200 Yahoo! group: 

http://groups.yahoo.com/group/Q-200_Engine_Group/



Sam Hoskins

On 5/27/07, Aaron Gustafson  <agustafson(at)chartermi.net (agustafson(at)chartermi.net)> wrote:[quote]        Thanks for the replies to this problem. I think I  may have it fixed. It was a junk yard carb (Wentworth). I replaced the float  (metal) and installed one piece venturi and needle and seat. After taking it  apart for the 3rd time and checking all carefully, the bail wire may have been  on the opposite side and there was no gasket on the emulsion tube. Yes the  needle to float clearance was right and all the bailwire adjustments were  correct. 

 Now I just have a small amount of gas in the bottom  of the airbox but no drips. I assume this is OK per reading of others  experiences. Does this sound normal? It is on an 0-200.

  

 Aaron Gustafson

   [quote][b]  http://www.matronics.com/Navigator?Continental-List http://forums.matronics.com 

www.MistakeProofing.net/blog/

618-967-0016 ph.

312-212-4086  fax  [quote][b]

- The Matronics Continental-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?Continental-List

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