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<DIV><FONT face=Arial size=2>Bob,</FONT></DIV>
<DIV><FONT face=Arial size=2>You say you are running the 140? or is it the
170? Which Mintor aluminum pipe, the sectional one at 3.5 oz or the old
style at 5 oz? They have different baffle positions and the tuning lengths
are different. Mintor began supplying a different length header when they
released the new lighter pipe, so there's a possibility you have a mismatch. I'm
very familiar with the 170 but less so with the 140, in as much as they have
exchangeable parts. </FONT></DIV>
<DIV><FONT face=Arial size=2> You want to prop the engine to run about
8000-8200, so the advice of others to use more prop is good. If you want
some more details visit my website at <A
href="http://www.aeroslave.com">www.aeroslave.com</A> under 3m Mintor engine
tips and tricks. I have some advice there. You probably will have to
lower the pump pressure 1/2 turn because I did when testing the engine with
CoolPower. Feel free to contact me off list with more details and I'm sure
we can resolve this. When set up right the Mintor (170 at least) has the
most linear 2 stroke carb out there. </FONT></DIV>
<DIV><FONT face=Arial size=2>--Lance</FONT></DIV>
<DIV> </DIV>
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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=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 6:15 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>