<head><style>body{font-family: Geneva,Arial,Helvetica,sans-serif;font-size:9pt;background-color: #ffffff;color: black;}</style></head><body id="compText">What fuel are you using? Check the exhaust valve for carbon deposit and header opening for clogging. <br><br>The surging could be uneven contact point on the valve cover. Wet sand it lightly with 400 sand paper on smooth surface until surface shines.<br><br>Adrian<br><br><br><blockquote style="border-left: 2px solid rgb(0, 0, 255); padding-left: 5px; margin-left: 0px;">-----Original Message-----
<br>From: Paul Horan <paul.horan@sbcglobal.net>
<br>Sent: Feb 2, 2009 11:18 AM
<br>To: General pattern discussion <nsrca-discussion@lists.nsrca.org>
<br>Subject: [NSRCA-discussion] YS 140 FZ: loads up and dies 2500 - 4500 rpm
<br><br><table border="0" cellpadding="0" cellspacing="0"><tbody><tr><td style="font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-size: inherit; line-height: inherit; font-size-adjust: inherit; font-stretch: inherit; -x-system-font: none;" valign="top"><div> The problem is a YS 140 FZ that runs fine at idle and 40 to 100% throttle but loads up around 2500 - 4500 rpm. This is especially nasty since that is the rpm range for a smooth takeoff, once it goes to full throttle the engine does not develop full power (about 40% power) and dies. Plenty of smoke trail so it is not going lean. </div>
<div> Another symptom is on the ground running 2500 - 4500 rpm the rpm is not steady. </div>
<div>Help,</div>
<div>Paul</div>
<div>NSRCA 3606 </div></td></tr></tbody></table></nsrca-discussion@lists.nsrca.org></paul.horan@sbcglobal.net></blockquote></body>