YS FZ91 Problem

[george kennie]

There's rain and then there's RAINNNN!!!!!!!

Troy Newman wrote:

> If its a new motor send to YS Performance. Richard and crew will fix it up
> right as rain....it will only cost you the $5 for shipping to him.
>
> Especially if its a warranty thing.
>
> TN
> ----- Original Message -----
> From: "Ed White" <edvwhite at yahoo.com>
> To: <discussion at nsrca.org>
> Sent: Wednesday, January 28, 2004 10:11 PM
> Subject: YS FZ91 Problem
>
> > Folks,
> >
> > We have a club member who is really interested in
> > pattern and bought a ARF pattern plane and put a YS
> > FZ91 in it to fly Sportsman and Intermediate.  The YS
> > has been a problem since he bought it.  It starts
> > easily and runs great on the ground, idles beautifully
> > before take-off, has good power in the air and flys
> > the intermediate sequence well.  Then he sets up for
> > landing and on the downwind or base leg the engine
> > quits.  I don't mean occasionally quits, I mean every
> > stinking time.
> >
> > This is a very low time engine and the only time I've
> > seen it land under power was when the throttle linkage
> > slipped and he couldn't make it idle.  We've checked
> > for pressure leaks, run the same magnum fuel I use in
> > my FZ140, tried the idle leaner, tried the idle
> > richer.  He sent the engine back to YS who installed
> > an "updated" piston.  All to no avail.
> >
> > I finally got him to give me the engine to tear down
> > and look at.  I haven't got very far into it, just
> > pulled the valve and airbox covers and diaphragm.  I
> > was sorta hoping to find an air leak but so far
> > nothing obvious.  Any thoughts/experience from the
> > community?
> >
> > Thanks,
> >
> > Ed
> >
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