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I don't know if this is helpful, or representative of the Y.S. breed,
but my experience has been remarkably uniform with my Y.S. engines.
(1-.53, 4- 1.40FZ's 2-1.20's and 1- 1.40L) And that has been: main
needle open 1-1/4 to 1-1/2 turns open. Regulator: flush with CC
housing. Air valve: open 1-1/2 turns.<br>
As I say, all my engines happen to be extremely uniform, in that these
settings are just what seems to work best. As they say, "Your Flight
Time May Vary!"<span class="moz-smiley-s3"><span> ;-) </span></span><br>
HTH<br>
Bill Glaze<br>
<br>
bravo52 wrote:<br>
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<div><font face="Arial" size="2">Just started tuning a new 140
(sport) and it hits all the numbers but the needles seem a little off.
I'm at 8200 (backed off a few clicks) on the high end and it idles at
2200. Transition is smooth and if it sits more than a minuete or so,
it loads up. I'm using an OS F plug and 20/20 fuel. The tank is
plumbed per YS recommendations and I am using a YS fuel filter. Here
is the "seemingly" odd part, the high needle is one turn out, the
regulator is 1.25 out and the idle is 1.25 out. "Out" meaning screwed
full in. Any thoughts.</font></div>
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