YS FZ91 Problem

[Bill Glaze]

He stated that it's been back to Richard already; they haven't fixed the 
problem.
Have they run the engine on a test stand? Sometimes that can be very 
instructive.  I know that the engine works well on the ground, only 
problem being at idle for landing.  How does it take prolonged idle in 
the air if landing isn't intended?  Frequently, the longest period of 
time the engine is at idle, is in the landing setup and landing pattern. 
 What kind of RPM's is the engine set for at idle?

Bill Glaze

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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>>=====================================
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>>
>>
>>    
>>
>=====================================
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>
>  
>

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