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<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>#
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