YS 160 DZ

[Peter Pennisi]

I am not sure if I would race out straight away and buy the DZ 160. My
experience with the DZ 140 has been a disaster for almost 18 months. Prior
to the DZ purchase I had a fantastic run between 2 YS140 L engines. The 140L
was a glorious engine. I had well over 1000 flights between them without a
problem.

Then came the DZ. Pulled it out of the box and put it on the stand. Result
was it would not run, it would idle but die lean on throttle up. Engine
returned for repair under warranty in which pump was replaced. Engine
returned 4 weeks later. I had about 80 flights on the engine when it
stripped its first cam gear. Engine returned under warranty. Factory
replaced a number of parts including crank etc. Engine returned after 6
weeks. 

Engine ran for another 30 flights before another cam gear stripped. Engine
returned to factory for repair. Again a large number of parts were replaced.
Engine was returned 5 weeks later. 

Engine ran for another 15 flights before it had its 3rd cam failure. Same
story back to the factory with large number of parts replaced.

I am currently running the engine at present. It has approximately 30
flights since the last rebuild. I did have to pull the engine apart after 20
flights because the O ring around one of the push rod covers had slipped out
causing an air leak. (I don’t think this would have happened if it was put
in correctly in the first place).


YS have a fantastic product when it is working properly but I do believe
they need to control what leaves their factory better. I don’t think these
engines are a mass produced industry and there is no excuse for poor quality
control. I do believe they have dropped their guard lately in this area.
With the emergence of the electric revolution just around the corner this
could prove costly.


 
Peter.
________________________________________
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On
Behalf Of Koenig, Tom
Sent: Wednesday, 29 September 2004 7:40 AM
To: discussion at nsrca.org
Subject: RE: YS 160 DZ

Gents,
 
Try $78 Aus for 30% CP Heli for a US Gallon !!!!
 
That's expensive in anybody's exchange rate....but that's what we pay....
 
I can run my car for a fortnight, cheaper than what I can for a weekend of
flying.
 
$160 US for six gallons....in my dreams 
 
Tom
 
 
-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On
Behalf Of Bill Glaze
Sent: Tuesday, 28 September 2004 11:50 PM
To: discussion at nsrca.org
Subject: Re: YS 160 DZ
Is every Y.S. 1.60 DZ owner running 30% nitro?  At the field Saturday, one
of the pattern flyers mentioned that another had spent $160 for just 6
gallons of 30%.
I'm currently running 15% (Red Max) in my Y.S. 1.40 engines, and they run
just fine. (and run, and run, and run.........)  I'm re-thinking my lust to
get a Y.S. 1.60; I had hoped the teething problems were over after the
engine's fine showing at the Nats, but I guess there's some more progress
that needs to be made before the engine is ready for us mere mortals!<G>
Bill Glaze

mike mueller wrote:
 Troy I've made a few observations about the YS engines after using them for
3 out of the last 4 years. We have what I believe to be the largest pattern
club in the country here in Chicago with at least 15 dedicated flyers at our
home field almost all use YS product.. 
 I think the YS DZ is the most powerful engine available today I also think
they are very unreliable. We've had over a 60% failure rate this year alone
with the DZ's being used here. When they run they are awesome and that's
what keeps most of us here willing to fight thru the problems. We have had a
lot of problems with the pumps. One of our sponsored flyers went thru 3
pumps on 1 engine this summer. These are people who have strong
relationships with Verano. 
 I have had a very good engine this year but it has continued to break head
gaskets all year long and it leaks fuel to the point of being nicknamed the
"Exxon Valdez". She's going back to the factory this week.
 I hope that YS takes there time with the release of the 160DZ and makes
them more reliable. One of our really top flyers here has had so many
problems with his 2 DZ's this year that it all but ruined his season. The
guys a top auto mechanic and he knows engines.
 I'm going to stick with the DZ because I think it's like F1 racing. On the
edge! Still one should know what there getting into with these expensive,
finicky and complicated buggers.
 Also I know that our group has enough mechanical smarts to setup and run
engines correctly. I'm hoping for the best here. Thanks, Mike

Troy Newman <troy_newman at msn.com> wrote:
Mike,
 
I have not seen the MA ad yet, but I do know that Yamada was playing with
some new pump designs. This was a two fold deal: #1 make the pump easier to
produce (less $$ and less hassles) and #2 to make the pump a more user
friendly easier to adjust version. Now with this re-design I believe they
found out some things in the longevity side of the equation and these
applied to the std 140DZ pump. Then the 140DZ pump got an upgrade and met
the goals of the new pump design and kept the parts the same in terms of
looks. My original 160 DZ has the same pump as the 140DZ. 
 
I have run both pumps and they run the same. Then again I don't tend to have
problems with my motors. They just run and run and run. I actually wear them
out after hundreds of flights. 
 
TN
----- Original Message ----- 
From: Zoro1024 at aol.com 
To: discussion at nsrca.org 
Sent: Monday, September 27, 2004 8:19 PM
Subject: Re: YS 160 DZ

Kind of wonder myself, I see their add in the AMA magazine shows a different
pump arrangement.  Something has got to make them better, I've become the
postman's best friend mailing the 140's back to NV.
 
 
 
Mike
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