<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt">The list is a great way to to get ideas as to what might be wrong with the engine, but there are a lot of variables. Trying something is a good first start. Better now than the first day of the NATS.<br><div> </div>Bob Kane<br>getterflash@yahoo.com<div><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font size="2" face="Tahoma"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Paul Horan <paul.horan@sbcglobal.net><br><b><span style="font-weight: bold;">To:</span></b> General pattern discussion <nsrca-discussion@lists.nsrca.org><br><b><span style="font-weight: bold;">Sent:</span></b> Monday, February 2, 2009 7:38:28 PM<br><b><span
style="font-weight: bold;">Subject:</span></b> Re: [NSRCA-discussion] YS 140 FZ: loads up and dies 2500 - 4500 rpm<br></font><br>
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<div>Ron, </div>
<div> After talking With Pete Cosky, checking out the regulator is exactly what I plan to do. I've seen the green gunk before and cleaned it up on other engines. Think I will do that before we take it out to the field tomorrow.</div>
<div>Thanks,</div>
<div>Paul<br><br>--- On <b>Mon, 2/2/09, Ron Van Putte <i><vanputte@cox.net></i></b> wrote:<br></div>
<blockquote style="border-left: 2px solid rgb(16, 16, 255); padding-left: 5px; margin-left: 5px;">From: Ron Van Putte <vanputte@cox.net><br>Subject: Re: [NSRCA-discussion] YS 140 FZ: loads up and dies 2500 - 4500 rpm<br>To: "General pattern discussion" <nsrca-discussion@lists.nsrca.org><br>Date: Monday, February 2, 2009, 5:47 PM<br><br><pre>Before this is done, there will be recommendations to replace everything below<br>the plug and then put in a new plug. <BG><br><br>Seriously, the diaphragm could be bad or the plunger could be sticking in the<br>pressure regulator. If the diaphragm looks good, it is probably OK. If you<br>remove the plunger (paying attention to the orientation of the spring) and find<br>"green gunk" on the stem, the plunger will stick intermittently. Clean<br>it.<br><br>Ron<br><br>On Feb 2, 2009, at 5:32 PM, Ed White wrote:<br><br>> That's my vote, ring and probably bearings, if the engine has any<br>serious
time on it.<br>> <br>> Not only the ring but if the slot for the ring is also worn (the ring has<br>a sloppy fit in the piston slot and can move up and down visibly at all), you<br>may need a new piston as well.<br>> <br>> Ed<br>> <br>> From: Derek Koopowitz <derekkoopowitz@gmail.com><br>> To: General pattern discussion <nsrca-discussion@lists.nsrca.org><br>> Sent: Monday, February 2, 2009 2:19:14 PM<br>> Subject: Re: [NSRCA-discussion] YS 140 FZ: loads up and dies 2500 - 4500<br>rpm<br>> <br>> I would suggest replacing the piston ring and perhaps even the bearings.<br>> <br>> From: nsrca-discussion-bounces@lists.nsrca.org<br>[mailto:nsrca-discussion-bounces@lists.nsrca.org] On Behalf Of<br>adriancwong@earthlink.net<br>> Sent: Monday, February 02, 2009 12:09 PM<br>> To: paul.horan@sbcglobal.net; General pattern discussion<br>> Subject: Re: [NSRCA-discussion] YS 140 FZ: loads up and dies 2500 -
4500<br>rpm<br>> <br>> What fuel are you using? Check the exhaust valve for carbon deposit and<br>header opening for clogging.<br>> <br>> The surging could be uneven contact point on the valve cover. Wet sand it<br>lightly with 400 sand paper on smooth surface until surface shines.<br>> <br>> Adrian<br>> <br>> <br>> -----Original Message-----<br>> From: Paul Horan<br>> Sent: Feb 2, 2009 11:18 AM<br>> To: General pattern discussion<br>> Subject: [NSRCA-discussion] YS 140 FZ: loads up and dies 2500 - 4500 rpm<br>> <br>> The problem is a YS 140 FZ that runs fine at idle and 40 to 100%<br>throttle but loads up around 2500 - 4500 rpm. This is especially nasty since<br>that is the rpm range for a smooth takeoff, once it goes to full throttle the<br>engine does not develop full power (about 40% power) and dies. Plenty of smoke<br>trail so it is not going lean.<br>> Another symptom is on the ground
running 2500 - 4500 rpm the rpm is<br>not steady.<br>> Help,<br>> Paul<br>> NSRCA 3606<br>> _______________________________________________<br>> NSRCA-discussion mailing list<br>> NSRCA-discussion@lists.nsrca.org<br>> <a target="_blank" href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a>
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