[SEL] Spark Plug Stuff

[Jim and Diane]

Hi Edd,

Teflon on an ignitor sounds like a good choice to me, I expect it would last 
almost forever.  I do not think it would stand up at all well as a ceramic 
replacement on a spark plug.  The tip of the plug will far exceed 500 F. 
Probably never get close to that on an ignitor engine.

Jim

Jim and Diane Kirkes
Hemet, CA , U.S.A.
jd.kirkes at verizon.net
----- Original Message ----- 
From: "edd payne" <edsingns at winsoft.net.au>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Sent: Thursday, April 20, 2006 2:44 PM
Subject: Re: [SEL] Spark Plug Stuff


I have been using teflon on the rebuilding and making of igniters for years
and have not had one failure.It has never melted or burned and many engines
I have used it in have been throttle gov and run real hot.Many ign repairers
in the US also us it.Some don't like it as it is fairly soft and less
allowances are made the stationary electrode can tend to work loose.If you
use glass filled teflon some of this problem is alleviated.
EDD PAYNE
PO BOX 364 GULGONG
New South Wales  AUSTRALIA 2852
0263742387
edsingns at winsoft.net.au
----- Original Message -----
From: "Jim and Diane" <jd.kirkes at verizon.net>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Sent: Thursday, April 20, 2006 6:40
Subject: Re: [SEL] Spark Plug Stuff


>
> Teflon is good for about 500 deg F. max.  Anything past that is going to
> have a short lifespan. Sounds to me that it would be a very marginal
choice.
>
> Jim
>
> Jim and Diane Kirkes
> Hemet, CA , U.S.A.
> jd.kirkes at verizon.net
> ----- Original Message -----
> From: "John Culp" <johnculp at chartertn.net>
> To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
> Sent: Wednesday, April 19, 2006 8:53 PM
> Subject: Re: [SEL] Spark Plug Stuff
>
>
> Teflon tubing was mentioned 7-8 years ago on this list as a workable
> substitute for mica in ignitors. Don't see why that couldn't be made to
> work in a spark plug.
>
> John
>
> On Apr 19, 2006, at 10:28 PM, John Hall wrote:
>
> > If anyone cares to talk engine stuff, I got one for you. I need to
> > rebuild some rather expensive sparkplugs to have for spares. They are
> > built originally using Mica tubes and washers for insulators. Anybody
> > come up with a more modern material you prefer for rebuilding
> > plugs/igniters? I found some machinable ceramic but it ain't cheap!!
> > My biggest concern when choosing an alternative material is that I
> > don't know how much heat I need to withstand. Anybody have any idea
> > how hot it gets inside the combustion chamber of a "working" engine?
>
>
> John Culp
> Bristol, Tennessee, USA
>
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