[NSRCA-discussion] YS160 Piston problems

[John Pavlick]

Nice. Well, the bearings in my OS 160 are still fine... Sorry guys. You knew
someone had to do that. Seriously, how does the pin go into the piston? Is
it held with clips? I wonder if the fit is too tight. Full floating pins
(pins that ARE held with clips) should be fairly loose in the piston and the
rod. Maybe it's just a fit problem and not a weakness. If anybody has a new
motor it might be worth taking it apart to see if the pin fit is really
tight.

John Pavlick
http://www.idseng.com




 -----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of
JonLowe at aol.com
Sent: Sunday, September 03, 2006 11:17 PM
To: nsrca-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] YS160 Piston problems


  In a message dated 9/3/2006 9:19:24 PM Central Daylight Time,
Zoro1024 at aol.com writes:
    Just wondering if anyone else has experienced a problem with the piston
cracking arounf the wrist pin boss. I now have a second one with this same
problem.  It like the first one was running like gangbusters and gradually
started losing power. On tear down the cracked piston was very evident.
Going to send this one baxck to YS with the first piston also.  Looks like
the larger piston in the 160 is weak in the center.



    Mike H.

  Gary Courtney here in Huntsville, AL  just told me tonite that his piston
had done this and he discovered it today.

  Jon Lowe

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