Gray Plugs

[rr]

Sounds like when it is present it is a good idea to
replace the plugs. I may have caused it by cleaning the
TB. Some of the gunk washed down & deposited on the plugs.

Thanks,

BobR.


On Wed, 09 May 2001 10:00:26 -0500
 Matt S Bower <m.s.bower at cummins.com> wrote:
> 
> 
> rr wrote:
> 
> > p.s. speaking of plugs, what is the reason for 'spider
> webbed' plug insulators?
> > 
> This is usually caused by contaminates on the insulator
> and when the
> pressure is high requiring higher voltage it will track
> the contaminates
> down the insulator to the ground shell instead jumping to
> the strap. 
> These paths down the insulator then develop thin carbon
> traces.
> 
> Matt
> 

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