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<DIV><FONT face=Arial>Bob,</FONT></DIV>
<DIV><FONT face=Arial>That's not nearly enough prop for that engine. Try a 17 X
12 APC and readjust your carb. I think you'll find everything will be working
much better.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Verne</FONT></DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=rschofield5282@wowway.com
href="mailto:rschofield5282@wowway.com">Robert Schofield</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> Sunday, May 08, 2005 7:15 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Mentor 140 Problem</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>I need advice. I have been trying to dial in
a Mentor 140 for 6 or 7 months. I have about 7 or 8 gallons of fuel thru it.
It took forever to get it to run half way right but it finally started to
work. I have it in a test plane because I still don't trust it. After break-in
I tried to fly it but it would surge at any low power setting. The people
I got it from sent me a new pump and carb. It will now idle well but mid-rang
is so rich it will 4 stroke. I was told to lengthen the pipe, which I
did. It was set at 1/2 in. between the header and front of the pipe. By
the way the pipe is the aluminum pipe from Mentor. The header is a 30mm. rise
from Mentor. </FONT></DIV>
<DIV><FONT face=Arial size=2>I leaned the low end and set the pipe at 3/4 in.
spacing. I also leaned the top end. I have tried lean and rich on both top and
bottom. It always runs very rich mid-range. I am using 15 % Cool Power. 17x8N
APC. RPM top is 8800. I richened it to 8400, 8500, 8600. Idle is very good and
reliable. When I pull verticle, that is when it leans out and runs like
it should, however blowing the top of the box at 80 mph ain't
cool. </FONT> </DIV>
<DIV><FONT face=Arial size=2>I was told to lower the pump pressure, which I
have not done yet. </FONT></DIV>
<DIV><FONT face=Arial size=2>I have run YS,OS,Supertiger, Hano's for 15
years, but this is the most flustrating thing I have ever
seen.</FONT></DIV>
<DIV><FONT face=Arial size=2>The power is scary, however I would like to have
throttle control instead if a "parked and gone" switch. </FONT></DIV>
<DIV><FONT face=Arial size=2>HELP</FONT></DIV>
<DIV><FONT face=Arial size=2>Bob
Schofield </FONT></DIV></BLOCKQUOTE></BODY></HTML>