View Full Version : Black Oily Plug?
Sjorge450R
11-14-2005, 08:16 AM
I pulled my plug from my 300ex yesterday (new plug was put in before my race and it hasnt been started since) and it was black with oil. Should I add two disks to my exhaust you should I just leave it like that? Thanks
300exOH
11-14-2005, 08:29 AM
Sounds like you are running rich. Adding disks may help lean it out a bit. You could even be burning some oil.
bwamos
11-14-2005, 08:33 AM
Go down a size on your main jet. You could probably even go down 2-3 sizes easily without going lean.
ommkevin
11-14-2005, 04:00 PM
sounds 2 lean 2 me
tater_kamik
11-14-2005, 04:50 PM
which one does it look like? plug color chart (http://www.dansmc.com/Spark_Plugs/Spark_Plugs_catalog.html)
and if its black, its not running lean, its either rich, or burning oil
Sjorge450R
11-16-2005, 07:29 AM
It looks like #1. It always ran fine before this with a nice brown color.
Sjorge450R
11-16-2005, 07:31 AM
I was reading the reason for it being like that and it says that it is oil seeping past the rings. I was going to do a rebuild this winter any way.
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