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<DIV>OK Matt and others,</DIV>
<DIV> </DIV>
<DIV>I have a question also. I have two Webra 1.60's with the MC carbs that do
run well. The only thing I don't like is that the adjustment seems real critical
(there is a small window from lean to rich). How can I adjust the engine or pipe
to make that window larger so that I am not so close to being too lean? Do I
need to change the pipe length or increase the pump pressure? Here is the set-up
that I am running...</DIV>
<DIV> </DIV>
<DIV>20% Cool Power fuel</DIV>
<DIV>Greve pipe set at 31 to 31.5 inches (measured from glow plug to rear
of pipe where the stinger starts)</DIV>
<DIV> </DIV>
<DIV>What do you all think?</DIV>
<DIV> </DIV>
<DIV>Thanks, Emory Schroeter</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=Rcmaster199@aol.com
href="mailto:Rcmaster199@aol.com">Rcmaster199@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, February 15, 2005 11:30
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Webra 160 Problem</DIV>
<DIV><BR></DIV><FONT id=role_document face=Arial color=#000000 size=2>
<DIV>Hey folks, thought I'd pass on a problem I experienced with my new 160
this past weekend and share the apparent solution.</DIV>
<DIV> </DIV>
<DIV>Extremely strong engine, easy starting just like its small brother.
However, it did something very annoying this past weekend. Rich running on
theground and for the first couple passes around the field. But after about a
minute of running, the moment I would point the nose up at partial throttle,
the engine would sag to lean, and then catch and run fine again. It did this
continuously at partial throttle but not at full throttle. Oil on the exhaust
stinger was darker than I would like to see, indicating lean</DIV>
<DIV> </DIV>
<DIV>Fuel delivery was compromised somehow after the first minute or two. I
did some playing around with making certain the pump wasn't being blocked from
cooling ram air, re-plumbed the tank and everything else, used large bore
tubing throughout, etc. Problem persisted.</DIV>
<DIV> </DIV>
<DIV>Took a close look at the vent's one-way valve (standard YS valve) and saw
that this was sticking. Removed it. To avoid syphoning of fuel through
the vent, I looped the vent line and secured with a tie strap forming a P
trap.</DIV>
<DIV> </DIV>
<DIV>Also increased pump pressure about 1/4 turn. These changes have helped
richen the engine to normal levels. </DIV>
<DIV> </DIV>
<DIV>MattK</DIV>
<DIV> </DIV>
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