Y.S.140L

[Henderson,Eric]

If the idle is too fast and quits when you drop the trim down, or it loads up and dies, the regulator is the secret to getting a solid idle. When this idle is right all of the other settings fall into place. In to lean and out to richen.

Regards,

Eric.

-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of jim ivey
Sent: Tuesday, May 06, 2003 7:57 PM
To: discussion at nsrca.org
Subject: RE: Y.S.140L



Eric
Maybe I'm lost but I always set the idle for 2000 with the transmitter adj 
and set the lo end adj. so that it would hold 2000 when brought back from hi 
throttle.As long as I have enough fuel delivery through the regulator for hi 
end I never touch the regulater.
Make that last paragraph so that I can understand how you use the regulator 
to set lo end.
Just here to learn.

Jim I


jivey61 at msn.com





>From: "Henderson,Eric" <Eric.Henderson at gartner.com>
>Reply-To: discussion at nsrca.org
>To: <discussion at nsrca.org>
>Subject: RE: Y.S.140L
>Date: Tue, 6 May 2003 19:43:28 -0400
>
>All the advice so far is good. If you have a good sealing seat on the 
>regulator then I suspect that it is not screwed in far enough or the spring 
>is canted.
>
>A method for testing this is to run the engine up and then kill it. Quickly 
>take off the fuel line that leads to the carb. at the carb end. If fuel is 
>pouring out of the line then the regulator is under pressure and is in a 
>valve open condition. Screw in the brass pressure adjuster until the fuel 
>flow stops. Pop the pressure line to make sure you still have pressure in 
>the tank. Repeat run-up if all pressure used up.
>
>
>The optimum setting point setting for a YS regulator is that the fuel drips 
>about 1 drop every five seconds from the carb feed (i.e. post regulator). 
>Reconnect and try the engine at 1 turn out on the transition screw and 1.5 
>turns out on the main needle. (Must be using a OS "F" plug for this test)
>
>Now you can warm the engine up and test the idle. The regulator sets the 
>idle. The transition screw only affects idle-to-1/4 throttle and the Main 
>needle does the rest. When at max rpm come back 200 rpm by richening the 
>needle to allow for a tiny bit of leaning out in long verticals.
>
>Hope this helps.
>
>Eric.
>
>-----Original Message-----
>From: discussion-request at nsrca.org
>[mailto:discussion-request at nsrca.org]On Behalf Of flyboy422 at juno.com
>Sent: Tuesday, May 06, 2003 7:17 PM
>To: discussion at nsrca.org
>Subject: Re: Y.S.140L
>
>
>
>  I have tried 3 different check valves and the regulator is installed
>correctlly. I checked the regulator and didn't see anything unusual but I
>will swap it with my other engine and give it a try. Thanks for the help!
>
>                  John
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