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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thanks Dean,<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I will pass this great information onto
Bruce.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Peter<o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
<st1:PersonName w:st="on">discussion-request@nsrca.org</st1:PersonName>
[mailto:<st1:PersonName w:st="on">discussion-request@nsrca.org</st1:PersonName>]
<b><span style='font-weight:bold'>On Behalf Of </span></b>Dean Pappas<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, 23 September 2004
12:11 AM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">discussion@nsrca.org</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: YS120AC problems</span></font><span
lang=EN-US><o:p></o:p></span></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Hello Bruce and Peter,</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>As you know, the regulator screw is both
the idle and mid-range adjustment. A tight (non worn-out) AC will
idle beautifully with a rich regulator. If it is only a little bit rich,
then the engine will appear to subtly richen at 1/2 throttle and full
power in the air. You may not even notice much of a rich transition, but this
does happen. If the regulator is set even more rich, then the idle-to-WOT
transition will be slow and blubbering rich.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>What we need to know to help you better is
whether the engine is definitely rich during this slow transition. You can
prove this by briefly pinching the fuel feed line as you push the
throttle up. Stay out of the prop's way as you do this, as it may backfire lean
and spit the prop off! If the pinch test improves the transition, then lean the
regulator 1/8 turn at a time, and reset the needle valve at full throttle,
each time. I have seen the regulator screw run
anywhere between one turn out from flush and several turns in
from flush with the housing. Put a fresh O.S. F type plug in the motor, as
well. </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>When you say that it smokes a lot, does
that mean while running (probably rich) or after the engine stops (probably
lean)?</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Let us know how it goes,</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'> Dean Pappas</span></font><o:p></o:p></p>
</div>
<blockquote style='margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi Peter,</span></font><o:p></o:p></p>
</div>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am still having problems getting my YS120AC to run
properly, even after putting in a new piston and ring.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The engine seems to idle okay, but is sluggish to pick
up revs, even after adjusting the needle. I have replaced the regulator plunger
and ring and fuel line, but no improvement. It also smokes a lot in my opinion.
Have you got any ideas! </span></font><o:p></o:p></p>
</div>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Regards,</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><st1:PersonName w:st="on"><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Bruce Hunter</span></font></st1:PersonName><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><a href="mailto:jhbh@tpg.com.au">jhbh@tpg.com.au</a></span></font><o:p></o:p></p>
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