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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-864116@logan.com>
Subject: Re: [FlyRotary] Spark Plug type
Date: Sun, 10 Apr 2005 19:40:28 -0400
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You are correct, Dale.  The "E" refers to 19mm thread_Length.  However, I
did hold the two type plugs up for a comparison and they appeared the same
overall length (Penetration wise) - clearly I was wrong.  I intend to
measure both with calipers tomorrow and will let the list know.

Ed
----- Original Message -----
From: "Dale Rogers" <dale.r@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, April 10, 2005 3:17 PM
Subject: [FlyRotary] Spark Plug type


> Ed,
>
>    It may be my memory is foggy (from working too many hours
> in a week) but, IRRC, "reach" refers to the _thread_ length,
> not the total penetration including the electrode.  It would
> be good to lay the new plugs along side the standard ones,
> with a straight edge on the gasket service, and compare
> them.
>
> Dale R.
> COZY MkIV-R13B #1254
> .        (__
> . |----==(__)==----|
> .       o/  \o
>
> ---- Ed Anderson <eanderson@carolina.rr.com> wrote:
>
> > I went back and check the e mail and sure enough I misread the type plug
as  B9EQV vice B9EGV.  Interesting in I had actually showed the e mail to
the auto parts guy with the correct type circled - but verbally spoke the
B9EQV, neither one of us caught the "minor" difference - sigh!    Both plugs
have the 19mm (3/5") reach - but don't know if the ground electrode is
different or not.   The B9EQV looks just like a conventional plug with
perhaps a bit finer center electrode and with a ground strap off the side.
Any difference there could have made a difference - assuming the plugs are
the problem.
> >
> > Well, in a few minutes I am off to see what I can find out and to start
taken the engine off.
> >
>
>
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>