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<TITLE>Re: [NSRCA-discussion] YS FZ63S Trouble</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>I wouldn’t hesitate to tear it down yourself and look through it. They’re fairly simple beasts, but pay attention to the orientation of the parts.<BR>
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If you want to send it in though, send it to YS Parts and Service – Richard Verano. The web site will have the address... www.yspartsandservice.com<BR>
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Their turn around is usually pretty quick. A few days or less, plus transit time there and back.<BR>
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-Mark<BR>
PS...could be a stuck valve... I’ve had that happen. Just too much carbon build up. <BR>
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On 8/26/08 5:32 PM, "<a href="ron@inweldcorp.com">ron@inweldcorp.com</a>" <<a href="ron@inweldcorp.com">ron@inweldcorp.com</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT COLOR="#000080"><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10pt'>I took the carb apart and everything looked normal and clean. I replaced all fuel tubing. I got about one minute into a test run and – sudden stoppage – at about 1/3 throttle. The crank turns freely about a quarter turn but hits hard stops in both directions. Doesn’t look good.<BR>
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I am very mechanical and have been into a lot of engines but never a four stroke. Should I tear this down myself or send it to someone? If so who? Any idea on lead time?<BR>
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</SPAN></FONT><FONT COLOR="#000080"><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'>Ron<BR>
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</SPAN></FONT><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'>-----Original Message-----<BR>
<B>From:</B> <a href="nsrca-discussion-bounces@lists.nsrca.org">nsrca-discussion-bounces@lists.nsrca.org</a> [<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org">mailto:nsrca-discussion-bounces@lists.nsrca.org</a>] <B>On Behalf Of </B><a href="vicenterc@comcast.net">vicenterc@comcast.net</a><BR>
<B>Sent:</B> Tuesday, August 26, 2008 10:48 AM<BR>
<B>To:</B> General pattern discussion<BR>
<B>Subject:</B> Re: [NSRCA-discussion] YS FZ63S Trouble<BR>
</SPAN></FONT></FONT><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'> <BR>
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</SPAN></FONT><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'>I agree with Don. Looks like there is an air leak. I will do the easy stuff first like replace <B><I>all</I> </B>the fuel lines. Small hole or cut in the fuel line could be a problem. <BR>
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</SPAN></FONT><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'>--<BR>
Vicente "Vince" Bortone<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'>-------------- Original message -------------- <BR>
From: "Don Ramsey" <<a href="don.ramsey@suddenlink.net">don.ramsey@suddenlink.net</a>> <BR>
</SPAN><FONT COLOR="#1F497D"><SPAN STYLE='font-size:11pt'>It’s possible that the high speed needle has vibrated it’s seat open. The 120s would do this because of weight of the needle valve. Once the brass seat is opened, you have to replace the assembly.<BR>
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</FONT></SPAN><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'><B>From:</B> <a href="nsrca-discussion-bounces@lists.nsrca.org">nsrca-discussion-bounces@lists.nsrca.org</a> [<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org">mailto:nsrca-discussion-bounces@lists.nsrca.org</a>] <B>On Behalf Of </B><a href="ron@inweldcorp.com">ron@inweldcorp.com</a><BR>
<B>Sent:</B> Tuesday, August 26, 2008 10:38 AM<BR>
<B>To:</B> NSRCA<BR>
<B>Subject:</B> [NSRCA-discussion] YS FZ63S Trouble<BR>
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</SPAN></FONT><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10pt'>I have a YS FZ63S on my Oxalys 50. The engine probably has about one hundred 12 minute flights on it.<BR>
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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.<BR>
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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.<BR>
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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?<BR>
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</SPAN></FONT></FONT><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'>Ron Needham<BR>
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