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<DIV><STRONG><FONT face="MS Sans Serif" color=#008080 size=2>I agree with
everything you stated Buddy but wonder what are the ones to do that don't have
local expertise to draw from supposed to do? An engine to perform well should
not need re-work and rebuilds as often as my YS engines have had. The
instructions that come with the engines when, there are any, aren't much help.
The cost of all those parts adds up quickly. Case in point. My first YS 120ac
was purchased after a rebuild. I flew it assuming everything was working
correctly and after 3 months and at 3rd contest had a Canadian friend mention
my engine didn't sound right. My reply was how can you tell. I have hearing
loss from Nam. It tacked at 8200 on believe a 15x12 on 15% powermaster.
Was told that was ball park. Pulling head cover friend found the e clip was
missing and rocker was floating back and forth. $150.00 later and fixed
damaged to engine and it ran like pussycat and turned 8500 with needle a tad
rich. How do us struggling by ourselves deal with engines that are that
difficult unless we are also a gear head. I don't have the means to have the
golden 3 rule when using YS's to have one in the plane, one as backup and one
getting repaired. That is what many of my friends had gone to while using
YS's.</FONT></STRONG></DIV>
<DIV><STRONG><FONT face="MS Sans Serif" color=#008080
size=2> </FONT></STRONG></DIV>
<DIV><STRONG><FONT face="MS Sans Serif" color=#008080
size=2>
del
<BR>
NSRCA - 473</FONT></STRONG></DIV></BLOCKQUOTE>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=BUDDYonRC@aol.com
href="mailto:BUDDYonRC@aol.com">BUDDYonRC@aol.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, March 30, 2004 8:06
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: YS Engines</DIV>
<DIV><BR></DIV><FONT face=arial,helvetica><FONT lang=0 face=Arial
color=#8000ff size=2 FAMILY="SANSSERIF" PTSIZE="9">Lance<BR>I believe that
most problems that people have with YS four strokes are caused by them not
understanding the basic operation and feeding requirements of the YS design. I
had this problem when I first started running them, I had little help here and
went through the expensive learning curve. The best advice that I can
give to those that are new to running the YS four stroke is to use the correct
fuel and to never force it or run it lean. If it isn't running right SHUT IT
DOWN and find the problem. Most problems that I have found that can ruin a
good engine are not the fault of the engine but are caused by a fault in the
tank, or fuel system. most common of these are trash in the system that fouls
the diaphragm regulator or leaks in the tubing both of these problems will
cause lean run's and overheating that will damage the engine very quickly the
other most common problem is valve clearance adjustment which will cause loss
of power if they are loose or overheating and loss of power if they are to
tight.<BR>When these things happen the inexperienced operator start's messing
with the needle valve and regulator settings which only makes the problem
worse. After the engine is properly set up you rarely have to touch anything
except maybe a click or two lean or rich on the needle valve.<BR>An
experienced YS operator can listen to one and tell immediately if it is
running properly.<BR>After destroying a couple of them during my learning
period and stupidity some eight years ago I have run four YS engines in
several airplanes and logged hundreds of flights on them with little or on
problems. I recently purchased two new YS-140 Sport's and so far these seem to
be the best yet from YS they ran right out of the box and seem to be as strong
as the 140-L if not stronger and I didn't have to mess with the pipe length to
get them to run right.<BR>Buddy
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