[NSRCA-discussion] OS 140RX Need Help

[Vicente "Vince" Bortone]

I agree with Chris.  Furthermore it is used engine.  Replace the bearings before loosing more time is the best way to fix it. 



Good luck, 

Vicente "Vince" Bortone 

----- Original Message ----- 
From: Snaproll4@ aol .com 
To: nsrca -discussion at lists. nsrca .org 
Sent: Saturday, August 8, 2009 9:24:02 PM GMT -06:00 US/Canada Central 
Subject: Re: [NSRCA-discussion] OS 140RX Need Help 


To check the main bearing:  When the engine is warm, rock the prop back and forth.  A very little play is OK.  Anything more needs replacing.  It is unlikely the front bearing needs replacing.  I always ran my 140 1 turn out on the HE needle.  I would start with the low end needle.  140's have always run rich on the low end. 

Steve 


In a message dated 8/8/2009 10:14:56 P.M. Eastern Daylight Time, lld613@ psci .net writes: 




When I get it lean by pinching the fuel tube it will transition ok until it loads up again… 



Is this consistent with the main bearing. I have a set of bearings to install if needed…Would rather not, unless this is the cause… 



Larry 






From: nsrca -discussion-bounces at lists. nsrca .org [mailto: nsrca -discussion-bounces at lists. nsrca .org] On Behalf Of Chris Moon 
Sent: Saturday, August 08, 2009 9:07 PM 
To: General pattern discussion 
Subject: Re: [NSRCA-discussion] OS 140RX Need Help 



Main bearing.  No acceleration and loading up are classic signs. 

Chris 





-- Sent from my Palm Pre 







Lisa n Larry wrote: 


I’m trying to get a plane going to make the Quincy, OH contest next weekend… 



When running at idle or the engine isn’t running, fuel leaks out of the carb. I can get it started, but loads up in about ten seconds and bogs down and dies when increasing the throttle… 



If I pinch the fuel line, it leans out and recovers. As long as I stay near full throttle it’s fine…When at half throttle and lower it will bog down…. 



HS needle is at about 1-3/4 out leaned from about 2 turns out. I don’t know the pump settings. 



This is a used engine already installed in a plane… 



Is it just a matter of the pump pressure being too high or do I have other problems to deal with…??? 



Larry Diamond 

NSRCA 3083 

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