YS 140L Help (Solved)

Thu Jul 31 17:30:58 AKDT 2003

I only ever do it once. (The pin setting)

One other problem is that sometimes the bit that sits on top of the valve is not flat and pushes the rocker over to one side. I regrind if that is the case or fit new ones.

As regards spares - the answer is I carry everything. Not trying to be cute either. It is because at one time or another everything has failed. I can't think of a part that has not. Yesterday I swapped in a new cam. The old one suddenly pitted at the tip and was clicking. Just sounded like a broken valve spring...

The YS ditty is, "One in the plane, one in the van and one at YS being repaired". The power is worth it but can be a pain to maintain.

E.

-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of jed241 at msn.com
Sent: Thursday, July 31, 2003 9:14 PM
To: discussion at nsrca.org
Subject: Re: YS 140L Help (Solved)

How often do you reset or check the pivot arm. One of the three pieces 
looked like it was deprived of oil. You can see the obvious wear signs of 
metal to metal on that piece. The clip seems to be a softer metal than the 
rocker arm, as the rocker arm appears unscathed.

Is there a list of parts that would be a good idea to have at a contest for 
repairs. Not wanting to invest in another 140L just to have a back up at 
this point. Maybe after a few months when my wallet heals...<vbg>

See ya,

Larry

----- Original Message ----- 
From: "Henderson,Eric" <Eric.Henderson at gartner.com>
To: <discussion at nsrca.org>
Sent: Thursday, July 31, 2003 8:03 PM
Subject: RE: YS 140L Help (Solved)

Don't feel alone. They break in every way they can. I always reset the pivot 
rod so that the rocker arms have equal spaces on both sides. This "usually" 
keeps the clips in one piece, plus some oil from day one...

Regards,

Eric.

-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of jed241 at msn.com
Sent: Thursday, July 31, 2003 8:58 PM
To: discussion at nsrca.org
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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