Other Black dust on terminals/plugs

[motozachl]

What is this from? I searched but could no find anything. It does it on one of our skis but not the other.

 

[ticega306]

Not sure if this is the same thing but the dielectric grease I use in the plug boots turns grey after a while. Always figured its just deposits from the plug tops contaminating the grease. I just clean it off and regrease when it looks dried out.

 

[Freakrider]

Byproducts from spark jumping from terminal to plug , in complete darkness you can see the process glow through the oem thin plug boots.

 

[motozachl]

Thanks guys. They both have new msd terminals and boots, will just dielectric them both up