Gaskets

Fri Sep 19 13:12:28 AKDT 2003

Guys
If this engine was sitting idling for 2 years it may be worn out.

Couldn't resist that one.   Tootle doo.!!!!!

Jim Ivey

jivey61 at msn.com

>From: george kennie <geobet at gis.net>
>Reply-To: discussion at nsrca.org
>To: discussion at nsrca.org
>Subject: Re: Gaskets
>Date: Fri, 19 Sep 2003 10:24:45 -0400
>
>Thanks Bill, Dave, Ken, Everybody who responded. Much additional 
>information
>indicating a few more areas that I missed. Will implement all suggestions.
>Georgie
>
>"William C. Harden" wrote:
>
> > Georgie,
> >
> > If the engine won't come down to idle and the carburetor is closed, then
> > you have an air leak.
> >
> > The air leak could be caused by any of the gaskets including the air box
> > and valve cover, as well as any of the O' rings. The valve cover gasket
> > is notorious for this problem.  Also consider the O' rings on the pipe
> > at the air box and the engine head; also the O' rings at each end of the
> > pushrod external tubes (at the head and engine case).
> >
> > Good luck.
> >
> > Bill Harden
> >
> > -----Original Message-----
> > From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
> > On Behalf Of george kennie
> > Sent: Thursday, September 18, 2003 7:50 PM
> > To: discussion at nsrca.org
> > Subject: Re: Gaskets
> >
> > Guys,
> > Thanks for trying.
> > The engine is a 91 AC and has been sitting idle for about 2 years. 2
> > years ago
> > it was running O.K., but when I tried to run it in a  new airplane it
> > did not
> > run very well. It starts O.K. and the top end seems good, but when I try
> > to come
> > back to idle it only comes down to about 6k rpm and this is with the
> > barrel
> > CLOSED and after running for about at least 30 seconds it may slow to
> > 2200 with
> > sporadic intervals where it almosts quits and then sometimes will speed
> > back up
> > to 6k again and once again, all with the barrel closed.
> > The regulator gasket is the diaphragm and I replaced that. I blew out
> > all
> > passages in the regulator body and they are free and clear. I checked
> > the
> > silicone plunger and it checks O.K.  The plunger shaft was checked for
> > freedom
> > of movement, again O.K. The shut-off action of the plunger was checked
> > and
> > operated as designed. The regulator screw is adjusted flush. The
> > air-bleed screw
> > is adjusted 1&1/2 turns out(I've tried it from closed to 5 turns out).
> > The needle valve body has been blown clear and a small wire run thru the
> > passages to insure that no foreign material is clogging anything.New
> > O-rings
> > installed on the needle valve body.New O-ring at the base of the airbox.
> > The
> > backplate, carburetor body, and airbox gaskets replaced and all screws
> > adequately retightened. The valves adjusted and the cover base dressed
> > flat and
> > reassembled with a new gasket. After all this the engine runs like it
> > has an air
> > leak somewhere.
> > When I adjust the throttle from the 6k rpm point to return to full
> > throttle it
> > sounds like it's starving for 2 or 3 seconds before it starts to recover
> > to full
> > speed.
> > Tank pressure is strong and fuel flow to the carb is good.
> > I'm at my wits end and I'm not that keen on sending it to the repair
> > facility as
> > I sent my 63 to them a couple of months ago and it came back the same
> > way it
> > went in.Now I'm stuck with two engines that are unusable.
> > Any further ideas will be gratefully received.
> > Georgie
> >
> > Tony Stillman wrote:
> >
> > > George:
> > > The only real problem was the regulator gasket.  High nitro, over
> > time, will
> > > cause the tiny fuel passage hole to close up.  The new regulator
> > gasket
> > > material is black, and does not have this problem.  The "Leak Free"
> > brand
> > > was also a different material, and will not clog.
> > >
> > > If you have to old brown "paper" regulator gasket, just replace it
> > with the
> > > regulator gasket that is available seperately for about $1.50.
> > >
> > > Tony Stillman
> > > Radio South
> > > 3702 N. Pace Blvd.
> > > Pensacola, FL 32505
> > > 1-800-962-7802
> > > www.radiosouthrc.com
> > > ----- Original Message -----
> > > From: "george kennie" <geobet at gis.net>
> > > To: <discussion at nsrca.org>
> > > Sent: Thursday, September 18, 2003 12:39 PM
> > > Subject: Gaskets
> > >
> > > > Hey Guys,
> > > > Need a little help here!
> > > > Some of you YS gurus please respond.
> > > > I remember seeing Leak Free Gaskets advertised some time back. What
> > I
> > > > would like to know is, why was there a market for this product? Does
> > the
> > > > motor start to malfunction in some way that indicates to you that
> > you
> > > > need new gaskets or that there may be a gasket leak somewhere and
> > what
> > > > are the symptoms. Does the motor cease to run or does it become
> > errattic
> > > > in some way? Please be specific as I feel that I may be experiencing
> > > > gasket woes.
> > > > Thanks for any help you can send my way.
> > > > Georgie
> > > >
> > > > =====================================
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> > > >
> > > >
> > >
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