YS140 DZ

[Peter Pennisi]

I had a similar problem when my engine decided to run lean on the bottom
end. The problem was rubbish in the carby housing. The result is you need
more pump pressure to push fuel through the crud. Carefully dismantle the
carby area and clean including poking a small wire through the fuel injector
nipple to ensure the fuel passage is clear. Things should return to normal.


Peter

Peter Pennisi
Pentagon Systems QLD Pty Ltd
P.O Box 4280
Eight Mile Plains
QLD 4113
Australia
Phone:    61+0738414234
Fax:        61+0738414264
Mobile:   0408007206
Email: pentagon.systems at bigpond.com
-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On
Behalf Of Terry Brox
Sent: Friday, 30 July 2004 12:54 PM
To: discussion at nsrca.org
Subject: Re: Re: YS140 DZ

Hi Jim,
         What were the symptoms? I had some problems with mine running lean
on the low end.  I just got it running good again, but only after turning
the pump in 3 1/2 turns. I flew 4 full flights including running out of fuel
and not a hiccup. I am still concerned what changed though. I checked the
pump as described by Richard and it is ok (checking the side play of the
pushrod). Anyone else have this problem.
PS all fuel lines, foam clunk, and filters are ok.
----- Original Message ----- 
From: <jivey61 at bellsouth.net>
To: <discussion at nsrca.org>
Sent: Thursday, July 29, 2004 7:49 PM
Subject: Re: Re: YS140 DZ


> Earl
>  After taking the pump apart again I find that the springs are shown
right, it is the pump valves that are shown reversed.Each valve should be
shown 180 deg so that the prong part mounts into the springs. This is the
way I had the valves last night and the engine ran ok.When I took it apart
the first time the whole inside of the pump had smoky looking crude in it.I
filter 2 times so I don't know where this came from.
> Anyway ,it appears to be running again. Thanks
>
> Jim Ivey
> >
> > From: "Earl Haury" <ehaury at houston.rr.com>
> > Date: 2004/07/29 Thu AM 10:06:44 EDT
> > To: <discussion at nsrca.org>
> > Subject: Re: YS140 DZ
> >
> > Yup - the drawing is backwards. The spring goes to the side with the
> > machined X. (Spring away from engine on top - toward on bottom.)
> >
> > Earl
> > ----- Original Message ----- 
> > From: <jivey61 at bellsouth.net>
> > To: <discussion at nsrca.org>
> > Sent: Thursday, July 29, 2004 7:57 AM
> > Subject: YS140 DZ
> >
> >
> > > Hi all
> > > Can someone tell me if the parts breakdown on the 140DZ pump is
correct. I
> > am speaking of the directions the pump valves are shown.I turned the
bottom
> > one reversed to way it is shown and the eng. runs.
> > >  Thanks
> > >  Jim Ivey
> > > P.S a dirty pump cost me at the nats.
> > >
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> >
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