YS 160 DZ

[Pattrnflyr at aol.com]

I had a YS91 that ran and ran for 8 years.  I had two other 91's that didn't 
run no matter what.  I had a 120NC that was a paper weight at best.  I had a 
140FZ that ran and ran for 3 years.  When you have an airplane that is an 
engine specific design, you are kinda stuck.  I bought a 110, no luck.  So I go to 
the hobby store and inspect 8 YS 110's.  Some had poor feeling movement, some 
had gaskets bulging out from the mating surfaces.  After going through all of 
them I picked one and crossed my fingers.  The quality between motor number 1 
and number 8 was marked.  I took the motor home, the pump wasn't flush, I 
fixed that.  The low speed screw was out three turns, I fixed that.  Then I 
tighted all the bolts I could get to on the motor.  I broke it in filthy rich on 25% 
in the driveway.  I currently have three gallons of 30% through it and it has 
been perfect!  My point?  I feel that maybe YS has a quality control problem. 
 I have had YS's that were great out of the box and some that nobody, 
including TN, could not get to run right.  Have I found the problem?  Don't know but 
this last excersize seemed to work for me.

See ya,

Bruce
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