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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have a YS FZ63S on my Oxalys 50. The engine probably
has about one hundred 12 minute flights on it.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The first trouble I noticed was that I had to trim the idle
up to keep it running but the engine ran strong at full throttle.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>After another 10 or 12 flights the engine would not develop full
power. Also, the high speed needle valve is more sensitive where before
it was difficult to tell exactly where the highest rpm was. Also the idle
has to be trimmed way up as the engine warms up and it quits when trying to
transition to high speed.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have installed a new glow plug, adjusted the valves, adjusted
the high and low speed mixture with no improvement. I see no air
restriction to the carburetor. The fuel filter looks clean. What
should I try next?</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoAutoSig><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Ron Needham</span></font></p>
<p class=MsoAutoSig><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
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