YS 140 problem

[mbacosa]

I ran into this problem some years back with a Y.S. 120 AC. I was faily new
to the 4 stroke scene at that time and spent countless hours wasting fuel
and pulling my hair out trying to figure it out. I agree with an earlier
comment that it is most likely a seal problem. My problem was with the
intake o-rings at the cylinder head.  If I would have kept to the KISS
method I would have found this alot earlier.
----- Original Message ----- 
From: "Dave Harmon" <K6XYZ at valornet.com>
To: <discussion at nsrca.org>
Sent: Thursday, July 14, 2005 7:25 PM
Subject: RE: YS 140 problem


> If it is a 140 Sport and you are using low viscosity oil fuel such as
> Cool Power 30% Heli, the regulator will need to be leaned and the low
> speed need needle will need to be leaned as well.
> I have used 2 of these engines very recently and they run very well and
> idle very well if you can get the idle lean enough.
> If you change to standard viscosity fuel such as Cool Power 20/20 Pro
> Pattern the mixture should lean out.
> Of course, you could contact YS Performance and get the official word re
> this problem.
>
> Regards
>
> Dave Harmon
> NSRCA 586
> K6XYZ[at]valornet[dot]com
> Broken Arrow, Ok.
>
> -----Original Message-----
> From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
> On Behalf Of Bob Kane
> Sent: Thursday, July 14, 2005 9:18 PM
> To: discussion at nsrca.org
> Subject: Re: YS 140 problem
>
> One more question, did you take the carb off or apart?
> There is a gasket between the carb body and packplate
> that will fit backwards and cause problems.
>
> --- Bob Kane <getterflash at yahoo.com> wrote:
>
> > Wow, that is a big prop . . . .
> >
> > Anyway, check the throttle stop screw, you should be
> > able to close the throttle barrel with the servo.
> > The
> > stop screw is next to the intake opening.
> >
> >
> > The low end needle should be out about 1 turn from
> > closed. It is an air bleed, so in is richer, out is
> > leaner.
> >
> > --- "Daniel J. Hamlett" <d77hamlett at comcast.net>
> > wrote:
> >
> > > The engine is a sport.  It has less than 40oz
> > > through it.  I am running
> > > the 1.40, NHP 5/8th header and ES carbon 5/8th
> > inlet
> > > pipe.  Sorry I
> > > forgot to add this on the original post.
> > >
> > > Bob Kane wrote:
> > >
> > > >Which 140?  FZ, L, DZ, Sport?  I assume it must
> > be
> > > a
> > > >DZ swinging a 17X10?
> > > >
> > > >--- "Daniel J. Hamlett" <d77hamlett at comcast.net>
> > > >wrote:
> > > >
> > > >
> > > >
> > > >>I know that in the past there has been a post on
> > > the
> > > >>following topic but
> > > >>I don't have it.  Something about having to
> > drill
> > > >>out the spray bar ???
> > > >>
> > > >>I have a YS 140 that I can't get to idle down to
> > > >>2200.  The lowers that
> > > >>I can get it is to about 2750-2800.  I know that
> > > >>this is way too high.
> > > >>I am running a Mezlick 17X10 prop and S+W 20/20
> > > >>fuel.
> > > >>
> > > >>Any help on this would be appreciated.
> > > >>
> > > >>Thank you in advance and good luck to all at the
> > > >>NATS.
> > > >>
> > > >>Dan
> > > >>
> > > >>
> > > >>
> > > >
> > > >
> > > >Bob Kane
> > > >getterflash at yahoo.com
> > > >
> > >
> > >__________________________________________________
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> >
> >
> > Bob Kane
> > getterflash at yahoo.com
> >
> >
> >
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>
> Bob Kane
> getterflash at yahoo.com
>
>
>
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