YS 140L Help (Solved)

[John Ferrell]

For future reference:
 E-clips (aka C-clips) are available from a lot of places because of their
wide usage, don't limit your search to hobby shops.
I have been reusing them for many years, mechanical linkage in computer
equipment makes extensive use of them.
Before the current valve retainers on YS engines, they used e-cips for that
function.

THE CAUSE of broken e-clips (and broken rocker shafts) is too much valve
clearence. That also wears out push rods.

The symptom of a broken rocker shaft is that you cannot turn the engine over
with an electric starter.
John Ferrell
6241 Phillippi Rd
Julian NC 27283
Phone: (336)685-9606
johnferrell at earthlink.net
Dixie Competition Products
NSRCA 479 AMA 4190  W8CCW
"My Competition is Not My Enemy"

----- Original Message ----- 
From: <jed241 at msn.com>
To: <discussion at nsrca.org>
Sent: Thursday, July 31, 2003 8:58 PM
Subject: Re: YS 140L Help (Solved)


> Good News...Found the problem...
>
> Bad News...Unless someone has parts and can bring them to the Lenox
Contest,
> I will not be flying the Focus and must live with the Aresti 40 once
more...
>
> The problem was the E-Clip that holds the rocker arms on the shaft. The
> exhaust side broke in about three pieces. One piece was jammed into the
> valve cover holding the exhaust valve open...Walla, no compression. Engine
> quit. Had compression as soon as I took the valve cover off. Took me a 1/2
> hour to find all the pieces. Piston and everything else looks good.
>
> Part needed is YS0580, E-Clip Set. I will buy them off of anyone that can
> bring it to the D4 Lenox contest. If not, There is a hobby shop about
1-1/2
> hours away...In the wrong direction for the contest...
>
> Has anybody else had this happen, or am I the only one with a gremlin
> disassembling the engine from the inside?
>
> See ya,
>
> Larry Diamond
>
>
> ----- Original Message ----- 
> From: "Atwood, Mark" <atwoodm at paragon-inc.com>
> To: <discussion at nsrca.org>
> Sent: Thursday, July 31, 2003 8:40 AM
> Subject: RE: YS 140L Help
>
>
> I don't think the low nitro would cause a "sudden" change or cause the
> engine to quit as you say it did, but I agree with Eric that the YS's
enjoy
> Nitro.
>
> Another thing to check if you've only run 10 flights is the valves.  I've
> had new or rebuilt engines where the valves have tightened up after the
> first few flights and it caused sudden failure.  I like to set the
> clearences on the tight side, but if they're tooooo tight, bad things
happen
> :)
>
>
> -----Original Message-----
> From: Henderson,Eric [mailto:Eric.Henderson at gartner.com]
> Sent: Thu 7/31/2003 9:11 AM
> To: discussion at nsrca.org
> Cc:
> Subject: RE: YS 140L Help
>
> I would not run an L with less than 20%.
>
> regards,
>
> Eric.
> -----Original Message-----
> From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On
> Behalf Of jim ivey
> Sent: Wednesday, July 30, 2003 11:07 PM
> To: discussion
> Subject: Re: YS 140L Help
>
>
> Larry
>  Make sure the clunk is not in the front of the tank. It is not Folded
> backwards. Check the plug and make sure low end idle is set correct. Also
> maybe lean it some more so that the top end won't be so loaded with fuel
> that it puts plug out when you pull it back to idle. Sometimes My 140's
will
> quit if I jerk them back to idle, if the are too rich on top end. I know
> guys my low end may not be right either.
>
> just tho'ts
> Jim Ivey
>
> ----- Original Message -----
> From: jed241 at msn.com
> Sent: Wednesday, July 30, 2003 10:52 PM
> To: NSRCA
> Subject: YS 140L Help
>
> I have a 140L in a Focus. Has been flying very well and very strong, with
> never a problem. I have about 10 flights on this barely used engine and I
> flame out in a very uncomfortable attitude. Vertical climb flamed out at
> about 25% of the vertical in a stall turn. I was settled at 3/4 throttle,
> never need full throttle flying Sportsman with this plane.
>
> Although at the down wind part of the field and pointed the wrong
direction
> when the engine quit (straight up), I was able to drag her all the way in
> and still managed to make it a very hot landing <vbg>.
>
> Anyway, What kind of things would cause a very strong running motor to
just
> quit? If anything it was a tad bit to the rich side with a exhaust trail.
>
> Fuel is WildCat 15% Nitro 18% Synth (no castor).
>
> Pretty vague question I know, just curious what this typically ends up
> being. I was planning on taking it to a contest this weekend.
>
> See ya,
>
> Larry
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