[NSRCA-discussion] was 1.40 L vibrations now DZ170

[Jerry Wilson]

My son has a DZ170 on Hyde mount that is also a beast on idle.  Wonder if a
shim might help it?

 

  _____  

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Bill Glaze
Sent: Saturday, December 05, 2009 1:46 PM
To: General pattern discussion
Subject: [NSRCA-discussion] 1.40 L vibrations

 

Many thanks to Jerry Stebbins for his suggestion to cure the extreme
vibration of my Y.S. 1.40 L.  Richard Verano of Y.S. services was kind
enough to send me a head shim for the engine.  The shim was only .0085"
thick, but it did the trick.  The engine is now markedly smoother at all rpm
ranges, and idles much more smoothly,  The transition to high speed is
immediate, with no hesitation or burping. And, it only cost me 200 rpm at
top speed, (WOT.)

Should I choose to, or need to, obtain the extra rpm's, I can do so with 30%
heli fuel.  I can't believe it's the same engine.  It's gone from being an
expensive paperweight, to a viable powerplant.

Many thanks to all who replied; this list is such a great source of help!

Bill Glaze

NSRCA 2388

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