[NSRCA-discussion] OS 140RX Need Help

Sun Aug 9 12:25:54 AKDT 2009

That's OK Larry, we love your wife too . . . .  :)

 Bob Kane
getterflash at yahoo.com

________________________________
From: Lisa n Larry <lld613 at psci.net>
To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
Sent: Sunday, August 9, 2009 2:13:40 PM
Subject: Re: [NSRCA-discussion] OS 140RX Need Help

I found the trick with a little help…I
replaced the clip and left the wrist pin alone…Got the piston and rod off…No
prying necessary, ready for the easy bake oven…

I really love my wife Lisa, the work is being
done on our kitchen table and now I’m going to bake the engine in her new
oven…VBG

Too all those that recommended replacing
the bearing…You helped to save this engine. I pulled the crankshaft and
the balls of the main started to fall out, the bearing spacer clip is broken in
numerous places.

This engine would have died a painful
death…

There was no damage to the crank shaft…

Larry

________________________________

From:nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Snaproll4 at aol.com
Sent: Sunday, August 09, 2009
12:44 PM
To: nsrca-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] OS
140RX Need Help

Don't pull the wrist pin.  Unless
this part is really gummed up, don't bother.  The rough feeling bearing is
a sign you're moving in the right direction.

In a message dated 8/9/2009 1:25:39 P.M.
Eastern Daylight Time, lld613 at psci.net writes:
OK…as I said, I haven’t done this before…
> 
>I’ve removed the clip from the wrist pin in the piston…
>What’s the trick to pulling the wrist pin? Is it threaded for
>a screw?
> 
>If yes, what size…I’m assuming metric…
> 
>Since I have the bearing, I’m going to replace it…Once
>I had the prop off, it does feel very rough…Couldn’t tell it with
>the prop on and rolling it back and forth…
> 
>I’ll adjust the LE needle once I put it back together if
>needed.
> 
>The previous owner sent me an e-mail this morning and said he it
>was running fine last fall. He also gave be a main bearing and other parts as
>well. Based on all the info, I’m replacing the bearing before I start
>with adjusting the LE….
> 
>Larry
> 
>
________________________________
 >
>From:>nsrca-discussion-bounces at lists.nsrca.org
>[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Phil Spelt
>Sent: Sunday, August 09, 2009
>11:55 AM
>To: General pattern discussion
>Subject: Re: [NSRCA-discussion] OS
>140RX Need Help
> 
>Larry,
>
>>I have run the 140RX -- FANTASTIC engine!!!  I agree with Dave.  When
>you pinch the fuel line, you lean out the engine temporarily, so it picks up
>speed until it dries out and quits.  Lean the low-speed needle until it
>will idle "forever" -- a minute or more, and pick up smoothly through
>midrange to full throttle without hesitation.  I have never had my 140RX
>stall, at idle or in the air...
>
>>At 12:49 PM 8/9/2009, you wrote:
>Content-Type: multipart/related;
>>          
>boundary="----=_NextPart_000_008C_01CA18EF.D0400F70"
>>Content-Language: en-us
>
>>I’ve never had an OS 140RX so I’m certainly no expert on them but
>it sounds like you are too rich on the low end to me. You may still need a
>bearing change and new ones won’t hurt but I’d  try a little
>leaner bottom end first.
>> 
>From: >nsrca-discussion-bounces at lists.nsrca.org [>mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Lisa n Larry
>Sent: Sunday, August 09, 2009
>12:41 PM
>To: ' >General pattern discussion'
>Subject: Re: [NSRCA-discussion] OS
>140RX Need Help
>> 
>>I pushed some Denatured Alcohol through the pump and it seemed to clear that up
>quite a bit...If I let it sit it will drip a little now and not at all at idle.
>So that seems to be under control...
>
>>Now it idles very well and I can adjust top end. I'm getting about 7,900 on a 4
>bladed prop 15.5x12 APC w/ PM Mean Green (15% w/ 18% all synthetic oil).
>
>>However, once it idles for any length of time or even 1/2 throttle, it will bog
>down and quite as soon as I start to advance the throttle. If I pinch the fuel
>tube it will pick up and run. If I go high then low and back to high throttle
>without too much delay it transitions well. If I'm at idle for about the same
>time as stall turn down line (2 or 3 seconds) it will bog down...
>
>>This is what I'm assuming everyone has keyed in on as the symptom of a main bearing >going bad...
>
>>Off to surgery...now I get to see what the inside of a 140RX looks like...
>
>>Again, Thanks for all the help....
>> 
>
________________________________
 >
>From:nsrca-discussion-bounces at lists.nsrca.org [>mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Lisa n Larry
>Sent: Sunday, August 09, 2009 9:15
>AM
>To: pnahobbies at sbcglobal.net; ' >General pattern discussion'
>Subject: Re: [NSRCA-discussion] OS
>140RX Need Help
>> 
>>I have the stock needle….
>> 
>>My main spare bearing is a Boca Bearing…P/N 6904Z and it is either
>shielded or sealed…
>> 
>>There appears to be no detectable play in the main bearing currently installed
>in the motor…
>> 
>>My strategy is to flush the pump first and see how it responds…If no go,
>then replace the main bearing…
>> 
>>Thanks for all the help, I will keep you posted…Hopefully we will get a
>few practice flights in yet today…
>> 
>>Larry
>> 
>
________________________________
 >
>From:nsrca-discussion-bounces at lists.nsrca.org [>mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of  >
>
>
>Ihncheol >Park
>Sent: Sunday, August 09, 2009 3:46
>AM
>To: ' >General
> pattern discussion'
>Subject: Re: [NSRCA-discussion] OS
>140RX Need Help
>> 
>
>> 
>>61FX needle is longer than the one on 70A.
>> 
>
>> 
>>Stock needle for 70A carb.
>> 
>From: >nsrca-discussion-bounces at lists.nsrca.org [>mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Lisa n Larry
>Sent: Saturday, August 08, 2009
>10:37 PM
>To: ' >General
> pattern discussion'
>Subject: Re: [NSRCA-discussion] OS
>140RX Need Help
>> 
>>Dennis, as always you are right on the money…
>> 
>>I have not touched the pump or anything else other than the HS needle…I
>believe it is either an OS # 8 or a “F”…I don’t have a
>61 FX…
>> 
>>Always coming back to the main bearing…There seems to be a trend
>here…
>> 
>>I haven’t flown a contest in over two years…Looking to get back in
>the saddle…I appreciate all the help….
>> 
>>Larry
>> 
>>PS, Dennis you just want to see my caller LOL…
>> 
>> 
>> 
>
________________________________
 >
>From:nsrca-discussion-bounces at lists.nsrca.org [>mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Dennis Bodary
>Sent: Saturday, August 08, 2009
>10:31 PM
>To:  >General
> pattern discussion
>Subject: Re: [NSRCA-discussion] OS
>140RX Need Help
>> 
>>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,  >OHcontest 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-----
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>> 
>
>
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>>NSRCA-discussion at lists.nsrca.org
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>-->
>There are only two types of aircraft -- fighters and
>targets.
>
>Phil Spelt, Webmaster
>& Past President, Knox County Radio Control Society, Inc.
>>       URL: http://www.kcrctn.com
>AMA--1294,  Scientific Leader Member, SPA--177
>>      My URL: http://mywebpages.comcast.net/~chuenkan/
>      (865) 435-1476 v  (865) 604-0541 c 
>
>
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________________________________

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