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  #1  
Old 08-15-2017, 09:07 PM
Selma Selma is offline
 
Join Date: Oct 2010
Location: Berlin, Germany
Posts: 38
Default Leaky Carb

After 360 h TT (RV9a, O320 D1A) the gasket of the acceleration pump (Marvel-Schebler MA4SPA 10-5217) got leaky. The airfilter E-3260 has this notch cut out and RTV seal around the acc.pump. I guess vibrations to the acc.pump are the culprit

Does anyone has changed this design? How? I would be very thankful for your help. We are not the builder, bought it flying. Thanks.
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Last edited by Selma : 08-15-2017 at 09:20 PM.
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  #2  
Old 08-16-2017, 06:13 AM
YellowJacket RV9 YellowJacket RV9 is offline
 
Join Date: Oct 2012
Location: Clearwater, FL / KZPH
Posts: 983
Default

As seen in another thread today, the notch and RTV in the air filter are normal and per plans. I doubt that would cause vibrations and a leak. I had a similar issue with a leaking carb. I had it overhauled and has been flawless since. (I also had the main jet drilled up one size).

Chris
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RV-9A - Done(ish) 4/5/16! Flying 4/7/16
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  #3  
Old 08-16-2017, 08:38 AM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 6,781
Default

The filter installation has no influence on causing a leak on the plunger seal.
This is a common issue on all types of aircraft with carb's that have an accelerator pump.
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Scott McDaniels
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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  #4  
Old 08-20-2017, 04:04 AM
Selma Selma is offline
 
Join Date: Oct 2010
Location: Berlin, Germany
Posts: 38
Default Airfilter issues

Chris, Scott,
I thought you might be interested in reading this web page:
http://www.vansairforce.com/communit...ferrerid=13027

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Selma
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