[NSRCA-discussion] After run oil?

[Keith Black]

Wayne is correct about needing a bearing replacement two years in a row
after flying in Houston and Nederland (not only was it humid but it also
rained). In fact, with the standard bearings in the Webra 1.45 I had to
changes bearings every 9 to 11 hours of flight regardless of what procedure
I used. However, after switching to the stainless steel bearing (after Boca
finally began making one) I'm now at 43 hours of flight time and the
bearings are still in great shape even after flying at Houston, Nederland
and then hanging it in my garage in Garland (Dallas) for seven months. In
fact, I stopped using after run oil due to what Wayne mentioned which is it
tends to accumulate around the glow plug and fowl it more quickly than when
not using after run oil.

I do always run my engine dry and burn Magnum 15%.

That's my experience.

Keith Black

----- Original Message ----- 
From: "wgalligan" <wgalligan at goodsonacura.com>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Wednesday, May 09, 2007 4:44 PM
Subject: Re: [NSRCA-discussion] After run oil?


> Here in the Dallas area we have not had to worry about too much humidity
to
> lately.  But it seems that every time Keith Black and I went to the
Houston
> area contest in June we ended up replacing a bearing shortly after that.
We
> were running std steel bearings then also.
>
> Wayne
> ----- Original Message ----- 
> From: "Tom Simes" <simestd at netexpress.com>
> To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> Sent: Wednesday, May 09, 2007 4:34 PM
> Subject: Re: [NSRCA-discussion] After run oil?
>
>
> > On Wed, 9 May 2007 14:42:00 -0500
> > "wgalligan" <wgalligan at goodsonacura.com> wrote:
> >
> >> OK.... time to open this can of worms again.   Are there some types of
> >>
> >> additives that can cause fouling or glassing of the plug element?  It
> >> seems  to me after I stopped using after run oil my plugs seemed to
> >> last longer.  I  am like Dr. Mike, just run it. I usually run the
> >> engine dry if I know its  going to set up for a spell. When I take the
> >> engine apart even after running  the engine out of fuel there is still
> >> a LOT of oil in the crank.  I am sure  if the engine is going to sit
> >> unrun for extended periods its a good idea to  lube the engine by
> >> taking out the plug and running plenty of an  anti-corrosive type of
> >> lube through the engine to keep the crank and sleeve  from developing
> >> rust.
> >
> > What's the average relative humidity where you and Dr. Mike are?  When I
> > lived in Arizona and New Mexico, the RH was so low I just didn't have to
> > worry about corrosion.  Now that I live in Anchorage, high RH, a
> > proximity to salt water and huge temperature swings combine to make
> > corrosion a big issue.  I fly all winter long and when cold soaked gear
> > is moved back into a warm environment, visible condensation forms all
> > over it.
> >
> > While corrosion prevention is part of the picture, I'm a little
> > surprised that nobody has mentioned softening carbon deposits as a
> > feature of using after run oil.  The high solvent content in Marvel
> > Mystery Oil or Rislone should help mitigate some of the carbon build up
> > in the 4 stroke crowd.  As far as I know though, both those solutions
> > would be a definate no no in a YS due to their effect on the silicone
> > components.
> >
> > With regard to the plug fouling quesion, MMO has been used for years
> > in aviation circles (100% scale) as a fuel additive to help counteract
> > lead fouling.  However, I would definately stay away from any of the oil
> > additives with zink compounds in them though (Slick 50, Motor Medic,
> > STP...)
> >
> > Thanks for the information guys :)
> >
> > Tom
> >
> > ======================================================================
> >   "Z-80 system stack overflow.  Shut 'er down Scotty, the system's
> >         sucking mud" - Error message on TRS 80 Model-16B
> >
> > Tom Simes                                       simestd at netexpress.com
> > ======================================================================
> > _______________________________________________
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> > NSRCA-discussion at lists.nsrca.org
> > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> >
>
>
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