[NSRCA-discussion] OS 140RX Need Help

[Dennis Bodary]

I am assuming this engine has sat for awhile. try injecting some straight methanol into the pump inlet line just in case the oil in the pump is congealed. denatured alchohol will work fine for this. 
Do not take the pump off the backplate thinking you can clean it out. Bad stuff will happen as the backplate is part of the pump you may or may not even be able to put it back together. 
Also try a OS F plug or the YS 4 stroke plug. never had any luck with the A5 plug that came with it. 
Another thought is check the needle valve against a OS61FX if the needle valve looks the same you are okay. If the needle taper part is different try the 61FX needle valve. It may already be in the engine as it comes with the engine as a optional part. 
If all else fails try replacing the rear bearing. 

--- On Sat, 8/8/09, Lisa n Larry <lld613 at psci.net> wrote:


From: Lisa n Larry <lld613 at psci.net>
Subject: [NSRCA-discussion] OS 140RX Need Help
To: "'General pattern discussion'" <nsrca-discussion at lists.nsrca.org>
Date: Saturday, August 8, 2009, 9:56 PM








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
-----Inline Attachment Follows-----


_______________________________________________
NSRCA-discussion mailing list
NSRCA-discussion at lists.nsrca.org
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion


      
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20090809/ce3faea6/attachment.html>