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Date: Sat, 21 Jan 2006 14:25:04 -0600
From: Dale Mahan <dalemahan@charter.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Fw: Lead Solvent or Cleaner
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... and the amount of insulator pitting is dependent on the grit 
coarseness of the abrasive used to blast the insulator? Fine abrasives 
pit the insulator less? How fine does the abrasive have to be in order 
to duplicate the original surface finish of the unglazed porcelain 
insulator? Wow, what a system.


Al Gietzen wrote:

> You connected the high voltage lead and opened a valve to increase air 
> pressure in the box.
>
> The plug would keep arcing right up to full line pressure, where a 
> dirty plug would not.
>
> No longer available because "A" few people know what a spark plug is, 
> and "B" Lawyers.
>
> Lynn E. Hanover
>
> Or it could be:
>
> A) few people know what a spark plug is
>
> B) plugs now last 6 to 8 times longer with unleaded gas
>
> C) The sand blasting pitted the ceramic insulator so the plug fouled 
> twice as fast the next time
>
> D) Plug manufacturers didn’t want people restoring old plugs instead 
> of buying new
>
> And/or E) lawyers J
>
> Al
>
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