Matronics Email Lists :: View topic - Muffler Backfire turning base to final

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Muffler Backfire turning base to final

Matronics Email Lists Forum Index -> RV10-List

View previous topic :: View next topic

Author Message

billderou(at)yahoo.com
Guest

Posted: Wed Mar 19, 2008 11:13 am Post subject: Muffler Backfire turning base to final

Flying RV10s-

  I have a consistent problem of backfiring through the mufflers as I come off the throttle. Don't think it is dangerous but scares the passengers.

   

  If I reduce the throttle slowly then it does not backfire. There is no exhaust gasket leak at the heads. Believe the idle mixture is adjusted correctly. Originally, I thought the joints in the exhaust pipes were leaking and would seal with carbon - but it has not happened in 170 hours.

   

  Anyone with a similar problem? Any suggested solutions?

   

  Thanks,

  Bill DeRouchey

  N939SB, flying with a few pops now and then

   

   

 [quote][b]

- The Matronics RV10-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?RV10-List

gerf(at)gerf.com
Guest

Posted: Wed Mar 19, 2008 11:34 am Post subject: Muffler Backfire turning base to final

Have the same problem on my RV-9 (IO-320 AFP, Injection,  Hartzell constant speed) particularly if the engine is windmilling fast and I  chop the throttle all the way out.  I've heard its common and the solution  is to reduce speed gradually so that you're not chopping throttle at high  RPM.  Also reduce throttle gradually, but it sounds like you're already  doing that ...

  

 g



   From: owner-rv10-list-server(at)matronics.com  [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Bill  DeRouchey

Sent: Wednesday, March 19, 2008 12:09 PM

To:  rv10-list(at)matronics.com

Subject: Muffler Backfire turning  base to final

 

 Flying RV10s-

 I have a consistent problem of backfiring through the mufflers as I come  off the throttle. Don't think it is dangerous but scares the passengers.

  

 If I reduce the throttle slowly then it does not backfire. There is no  exhaust gasket leak at the heads. Believe the idle mixture is adjusted  correctly. Originally, I thought the joints in the exhaust pipes were leaking  and would seal with carbon - but it has not happened in 170 hours.

  

 Anyone with a similar problem? Any suggested solutions?

  

 Thanks,

 Bill DeRouchey

 N939SB, flying with a few pops now and then

  

  

[quote]



href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List

href="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c

[b]

- The Matronics RV10-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?RV10-List

speckter(at)comcast.net
Guest

Posted: Wed Mar 19, 2008 11:58 am Post subject: Muffler Backfire turning base to final

In my experience your mixture is set too lean on the fuel servo.  Enrich it by a turn or turn and a half and see if that helps.  

   

Gary  

40274  

DAR Inspection scheduled  

         

  

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Gerry Filby

 Sent: Wednesday, March 19, 2008 3:31 PM

 To: rv10-list(at)matronics.com

 Subject: RE: Muffler Backfire turning base to final  

  

   

Have the same problem on my RV-9 (IO-320 AFP, Injection, Hartzell constant speed) particularly if the engine is windmilling fast and I chop the throttle all the way out.  I've heard its common and the solution is to reduce speed gradually so that you're not chopping throttle at high RPM.  Also reduce throttle gradually, but it sounds like you're already doing that ...  

   

g  

       

  

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Bill DeRouchey

 Sent: Wednesday, March 19, 2008 12:09 PM

 To: rv10-list(at)matronics.com

 Subject: Muffler Backfire turning base to final    

Flying RV10s-  

    

I have a consistent problem of backfiring through the mufflers as I come off the throttle. Don't think it is dangerous but scares the passengers.  

    

   

    

If I reduce the throttle slowly then it does not backfire. There is no exhaust gasket leak at the heads. Believe the idle mixture is adjusted correctly. Originally, I thought the joints in the exhaust pipes were leaking and would seal with carbon - but it has not happened in 170 hours.  

    

   

    

Anyone with a similar problem? Any suggested solutions?  

    

   

    

Thanks,  

    

Bill DeRouchey  

    

N939SB, flying with a few pops now and then  

    

   

    

   

   	  Quote: 	
		    href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-Listhref="http://forums.matronics.com">http://forums.matronics.comhref="http://www.matronics.com/contribution">http://www.matronics.com/c   	
0 	  Quote: 	
		   	
1 	  Quote: 	
		   	
2 	  Quote: 	
		   	
3 	  Quote: 	
		   	
4 	  Quote: 	
		   	
5 	  Quote: 	
		   	
6 	  Quote: 	
		   	
7 	  Quote: 	
		   	
8 	  Quote: 	
		   	
9 	  Quote: 	
		  href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List 	
0 	  Quote: 	
		  href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List 	
1 	  Quote: 	
		  href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List 	
2 	  Quote: 	
		  href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List 	
3 	  Quote: 	
		  href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List 	
4

       [quote][b]

- The Matronics RV10-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?RV10-List

flysrv10(at)gmail.com
Guest

Posted: Wed Mar 19, 2008 1:04 pm Post subject: Muffler Backfire turning base to final

Idle mixture too lean.  You need to turn 650-700 RPM and have a MP of 11-12.  Adjust your mixture on the ground to meet this spec.  I had the same problem.



Rob.



On Mar 19, 2008, at 3:09 PM, Bill DeRouchey wrote:[quote]Flying RV10s-

  I have a consistent problem of backfiring through the mufflers as I come off the throttle. Don't think it is dangerous but scares the passengers.

   

  If I reduce the throttle slowly then it does not backfire. There is no exhaust gasket leak at the heads. Believe the idle mixture is adjusted correctly. Originally, I thought the joints in the exhaust pipes were leaking and would seal with carbon - but it has not happened in 170 hours.

   

  Anyone with a similar problem? Any suggested solutions?

   

  Thanks,

  Bill DeRouchey

  N939SB, flying with a few pops now and then

   

   

  	  Quote: 	
		  http://www.matronics.com/Navigator?RV10-List

href="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/contribution



	
[b]

- The Matronics RV10-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?RV10-List

GenGrumpy(at)aol.com
Guest

Posted: Wed Mar 19, 2008 5:20 pm Post subject: Muffler Backfire turning base to final

I had same problem during flyoff hours.

  

 I did not change idle mixture.

  

 What I did do is start reducing power slowly on descent and in the pattern,  and richen the mixture up at the same time.  Have not had the problem  since.

  

 grumpy

  

 do not archive

  

 In a message dated 3/19/2008 4:06:27 P.M. Central Daylight Time,  flysrv10(at)gmail.com writes:

  	  Quote: 	
		  Idle    mixture too lean.  You need to turn 650-700 RPM and have a MP of 11-12.     Adjust your mixture on the ground to meet this spec.  I had the    same problem.    



   Rob.

   

   On Mar 19, 2008, at 3:09 PM, Bill DeRouchey wrote:    	  Quote: 	
		       Flying RV10s-

     I have a consistent problem of backfiring through the mufflers as I      come off the throttle. Don't think it is dangerous but scares the      passengers.

      

     If I reduce the throttle slowly then it does not backfire. There is no      exhaust gasket leak at the heads. Believe the idle mixture is adjusted      correctly. Originally, I thought the joints in the exhaust pipes were      leaking and would seal with carbon - but it has not happened in 170      hours.

      

     Anyone with a similar problem? Any suggested solutions?

      

     Thanks,

     Bill DeRouchey

     N939SB, flying with a few pops now and then

      

      

 	  Quote: 	
		  http://www.matronics.com/Navigator?RV10-List

href="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c

	




="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List

.matronics.com/">http://forums.matronics.com

://www.matronics.com/contribution">http://www.matronics.com/contribution



	
	


 

  



Create a Home Theater Like the Pros. Watch the video on AOL Home.

  [quote][b]

- The Matronics RV10-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?RV10-List

Display posts from previous:

	Matronics Email Lists Forum Index -> RV10-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum