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My experience has been mostly YS140FZ and YS120's.<br>
None will get along with a soft mount and any kind of muffler.<br>
The results with a hard mount are better but still a pain. Breaking
the muffler is not the worst part of it, you can lose it or worse
yet destroy the threads in the head. The short tube that came with
the YS120 worked pretty well though. <br>
<br>
Using a YS 4 stroke without some kind of locking nut on the prop is
unreliable and dangerous. <br>
I am kind of relieved that no one was interested in my offer to sell
my YS140 FZ's. If the buyer has not had the benefit of pattern
experience he is unlikely to have the skills and motivation to deal
with these competition engines.<br>
An engine mod to reduce vibration might be workable but I lack the
skills & ambition to pursue that. From discussions with the
engine guys involved in other engine competitions a solution will
likely involve crankshaft mods.<br>
<br>
Perhaps someone has some suggestions to domesticate the YS before
retiring them to the Sport Fliers?<br>
<br>
On 3/25/2012 3:45 PM, Michael Cohen wrote:
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I have a disaster in the making when trying to keep my 140DZ
sold to a non YS and non pattern user. I guess I took for
granted that we simply discarded the "stock" prop nut set and
used Tru-Turns system in its place. My offer to make it right
with the buyer is failing though because the engine did not show
up at his door step with a muffler. Aside from the fact that it
was not pictured in my add anyway, did the DZ's even come with a
stock muffler from YS? I know the 120FZ did, but not the DZs.<br>
<br>
Mike Cohen<br>
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<pre class="moz-signature" cols="72">--
John Ferrell W8CCW
“During times of universal deceit,
Telling the TRUTH becomes a revolutionary act”
George Orwell
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