YS 140L Help (Solved)

[Del Rykert]

Larry.
 
    When I got my first 120ac I ran it for awhile not realizing it was sick till I went to a contest when an experienced 4 cycle modeler said my engine sounded sick. Asked why he thought that and he could tell with his ear that it had a funny noise, I have hearing lose from NAM, and we pulled valve cover. He adjusted valves and found it was off and inconsistent in rpm runs at high. Discovered it had a missing E clip and never found the pieces. Engine was bought used and fresh rebuild. I had toast for rocker, pushrod was a mushroom. After repairs it ran the way it should have right along. Did it break or was it missing from the rebuild. No overt sign of internal scoring or where the pieces may have gone if their was one. 
    One of reasons I hate 4 cycles. Unless I dump those planes that are set up for fours I have to put up with them.
 
     Del K. Rykert
     AMA - 8928 
     NSRCA - 473
     Kb2joi - General 


  ----- Original Message ----- 
  From: jed241 at msn.com 
  To: discussion at nsrca.org 
  Sent: Thursday, July 31, 2003 5:58 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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