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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-2096741@logan.com>
Subject: Re: [FlyRotary] Re: MSD type Ignition CD or not?   was  Re: Spark Plug Cleaning
Date: Mon, 11 Jun 2007 14:23:21 -0400
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Bob, this is what I have observed.  The ceramic will be dark colored - dark 
charcoal - almost black.  But, that would probably look that way with carbon 
fouling also.  But, when I shine a strong light  on the ceramic cone, light 
glitters off of what I believe to be lead crystals - if I am correct then 
that could be a sign of lead fouling.  In other words, carbon fouling 
appears to leave a dull charcoal/black color whereas the lead apparently 
leaves dark  metallic crystals of some sort.  That's the best I can 
conclude.

Ed


----- Original Message ----- 
From: "Bob White" <rlwhite@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, June 11, 2007 1:59 PM
Subject: [FlyRotary] Re: MSD type Ignition CD or not? was Re: Spark Plug 
Cleaning


> Ed,
>
> Can you tell by looking at a plug if it's probably a SAG plug?  Is
> there any way of testing the plugs without flying them?  If there were
> some way to tell if that was the problem I experienced I would like to
> find out. I've squirted oil in the chambers to protect the engine while
> it's sitting around so that might complicate inspection.
>
> I bought a CD system for my 1952 Ford back in the early '60's.
> Unfortunately the '52 Ford was positive ground and the CD system was not
> so it didn't work at all.  I then tried to build one from plans in a
> book using the stock coil.  I never got it to work very well and gave
> up on the project.
>
> Bob W.
>