<HTML><BODY STYLE="font:10pt verdana; border:none;"><DIV> lhncheol</DIV> <DIV>You may have the wrong threaded adapter nut. Check that out. I'm not familiar with 813A, or 814A. What are these numbers. Been a while since I bought adapters.</DIV> <DIV> My 140l's run at full throttle about 1 1/4 to 1 1/3 needle opening. That has a lot to do with nitro content. I run 30% heli fuel. I'm guessing 2 turns out is a good starting place.</DIV> <DIV> </DIV> <DIV>Jim Ivey</DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt Arial">----- Original Message -----</DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt Arial; COLOR: black"><B>From:</B> Ihncheol Park</DIV> <DIV style="FONT: 10pt Arial"><B>Sent:</B> Sunday, June 01, 2003 10:19 PM</DIV> <DIV style="FONT: 10pt Arial"><B>To:</B> discussion@nsrca.org</DIV> <DIV style="FONT: 10pt Arial"><B>Subject:</B> RE: YS 140L tuning questions</DIV> <DIV> </DIV> <META content="MSHTML 6.00.2800.1170" name=GENERATOR> <DIV><SPAN class=201565401-02062003><FONT face=verdana>Jim,</FONT></SPAN></DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana>I just replaced the prop nuts with the standard YS washer and double nuts, the problem of loosening of spinner and prop is gone.</FONT></SPAN></DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana></FONT></SPAN> </DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana>It looks like the tru-turn adapter that I used worn out. the large nut is kind of loose on the shaft.</FONT></SPAN></DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana></FONT></SPAN> </DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana>I never open the throttle fast because of what you explained (lean condition). I am also afraid to do so even with small YS 4-stroke engines after hearing this engine broke two hyde mounts and damaged airframe. So, I opened very slowly, and little by little looking at the muffler and the spinner, being ready to shut down.</FONT></SPAN></DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana></FONT></SPAN> </DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana>Now, the high speed needle is about 2 and 3/4 turn out. I went to full throttle and stayed there about a minute and backed down.</FONT></SPAN></DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana></FONT></SPAN> </DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana>The engine died slowly. (rich?)</FONT></SPAN></DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana></FONT></SPAN> </DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana>I printed out Troy's explanation on how to set the engine and read it over a few times. Unfortunately, I don't have a plane ready for this engine yet.</FONT></SPAN></DIV> <DIV><SPAN class=201565401-02062003></SPAN> </DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana>Each run of the engine didn't go more than 3 minutes to make sure the engine doesn't get too hot on the ground.</FONT></SPAN></DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana></FONT></SPAN> </DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana>By the way, do you people use Tru-Turn 813A for 140? or 814A? I used 814A because I already had it. What's is the differences between the two?</FONT></SPAN></DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana></FONT></SPAN> </DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana>I know that without the spinner, 814A does not fit on YS 140L with very long shaft.</FONT></SPAN></DIV> <DIV><SPAN class=201565401-02062003></SPAN> </DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana>Looks like I have to order both.</FONT></SPAN></DIV> <DIV><SPAN class=201565401-02062003><FONT face=verdana></FONT></SPAN> </DIV> <DIV><SPAN class=201565401-02062003>Thank you,</SPAN></DIV> <DIV><SPAN class=201565401-02062003></SPAN> </DIV> <DIV><SPAN class=201565401-02062003>Ihncheol </SPAN></DIV> <BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px"> <DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma>-----Original Message-----<BR><B>From:</B> discussion-request@nsrca.org [mailto:discussion-request@nsrca.org]<B>On Behalf Of </B>jim ivey<BR><B>Sent:</B> Sunday, June 01, 2003 6:50 PM<BR><B>To:</B> discussion<BR><B>Subject:</B> Re: YS 140L tuning questions<BR><BR></FONT></DIV> <DIV>lhncheol</DIV> <DIV>When you open the throttle don't let it go wide open to the stops. This will be a lean condition. Always adjust full throttle for barrel to be straight up and down, not all the way open. This is really important with a Hyde or similar mount that will stretch under full power.</DIV> <DIV> For the spinner use double prop nuts. One nut will lock the prop nut. I also use washers to space the spinner so that the spinner bolt tightens against the nut without bending the backplate.</DIV> <DIV> If you hear that loud hammering or pinging you are lean. That's why it throws the props and spinner. Don't let it do that.</DIV> <DIV> The first tank on a rebuilt or new engine should be well on the rich side. After that put in plane and fly, slowly leaning engine for a few flights. The engines get more cooling in the air.</DIV> <DIV> There is a method to set the low end at 2000 rpm and to set max rpm. I will let someone else talk about that.</DIV> <DIV> </DIV> <DIV>Jim Ivey</DIV> <DIV> </DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt Arial">----- Original Message -----</DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt Arial; COLOR: black"><B>From:</B> Ihncheol Park</DIV> <DIV style="FONT: 10pt Arial"><B>Sent:</B> Sunday, June 01, 2003 9:13 PM</DIV> <DIV style="FONT: 10pt Arial"><B>To:</B> NSRCA</DIV> <DIV style="FONT: 10pt Arial"><B>Subject:</B> YS 140L tuning questions</DIV> <DIV> </DIV>OK, finally, I got all the parts installed including the updates.<BR>Here is the current setting.<BR>Idle screw and 2 turn out.<BR>High speed at 2 turn out.<BR>Regulator screw 1/4 turn out from flush with case.<BR>The engine is mounted upright on a stand with AAP muffler<BR>Magnum #2, APC 15x12W. (I listened to Troy Newman and bought the props!!)<BR><BR>I had to use music wire support from mount to the muffler because it kept<BR>come loose within a minute of running.<BR><BR>At idle, the engine spits fuel out of carb a lot as in rich condition.<BR>Going fine up to 2/3 throttle.<BR>When near the full throttle, there is a sharp "Ping~" sound. Spinner and<BR>prop got loose (tru-turn nuts are still on the shaft). Fortunately, the<BR>spinner cone was not damaged for the last 5 attempt. (the cone came loose<BR>twice flying upto 15 feet).<BR><BR>Am I still lean?<BR>Compression is very strong even with 3 head gaskets. Before running, there<BR>was almost no compression and had a little of hard time starting with<BR>chicken stick. (Excellent excercise on my right arm. I could not use kavan<BR>starter because of very sticky soft cone staying on the spinner.).<BR><BR>Now, I am afraid if I will damage the engine.<BR>What is a good way to keep the spinner and prop not to come loose?<BR><BR>Any suggestions?<BR><BR>Thank you,<BR><BR>Ihncheol Park<BR><BR><BR><BR><BR>=====================================<BR># To be removed from this list, send a message to <BR># discussion-request@nsrca.org<BR># and put leave discussion on the first line of the body.<BR>#<BR><BR></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>