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Engine Vibration

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pnicholson

Joined: 04 Jun 2011
Posts: 46

Posted: Sat Oct 22, 2011 1:39 pm Post subject: Engine Vibration

While crossing over the field in my nanchang, I proceeded to power back. As I brought the throttle back through 550MP, the engine began to vibrate violently. I powered back up and all was fine... Down again and the vibration returned. It ran rough on the entire approach. It was 8 degrees C so my friend suggested carb ice.  I'll be doing a run up tomorrow to see if the problem remains.  Does anything else come to the minds of the collective list?

Thanks

Phil N

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N13472(at)aol.com
Guest

Posted: Sat Oct 22, 2011 4:36 pm Post subject: Engine Vibration

Check to see that you did not unlock the primer with you elbow. If it is

open when

you pull the throttle and vacuum builds up it will suck fuel and run very

very rich and rough.



Tom Elliott

CJ-6A NX63727

777 Quartz Ave

PMB 7004

Sandy Valley NV

89019

Cell 702-595-2680

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cjpilot710(at)aol.com
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Posted: Sat Oct 22, 2011 5:57 pm Post subject: Engine Vibration

Check your primer.

 Pappy

  

  In a message dated 10/22/2011 5:39:53 P.M. Eastern Daylight Time,  pednicholson(at)gmail.com writes:

  	  Quote: 	
		  -->    Yak-List message posted by: pednicholson(at)gmail.com



While crossing over    the field in my nanchang, I proceeded to power back. As I brought the throttle    back through 550MP, the engine began to vibrate violently. I powered back up    and all was fine... Down again and the vibration returned. It ran rough on the    entire approach. It was 8 degrees C so my friend suggested carb ice.     I'll be doing a run up tomorrow to see if the problem remains.  Does    anything else come to the minds of the collective list?

Thanks

Phil    ies  ay                 - MATRONICS WEB FORUMS               - List Contribution Web Site  p;                             



	


 [quote][b]

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wlannon(at)shaw.ca
Guest

Posted: Sat Oct 22, 2011 6:47 pm Post subject: Engine Vibration

An unlocked primer is the most likely cause but also check for an intake 

leak.  If you have an intake drain kit installed (lower 3) check for 

cracking around the drain boss welds.



Walt

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viperdoc(at)mindspring.co
Guest

Posted: Sat Oct 22, 2011 7:46 pm Post subject: Engine Vibration

After my recent experiences, I can come up with some bad things but stay with simple straight forward ones for now. Do what has been suggested first and let the Zebras sleep for now. 

Doc



Sent from my iPad



On Oct 22, 2011, at 9:44 PM, "Walter Lannon" <wlannon(at)shaw.ca> wrote:



[quote] 

 

 An unlocked primer is the most likely cause but also check for an intake leak.  If you have an intake drain kit installed (lower 3) check for cracking around the drain boss welds.

 

 Walt

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