Not sure if this in the right spot but best spot I could find.Dingo with a Kohler twin motor is fouling one spark plug. What is strange is the way it is fouling the plug. The end ring of the plug is very clean, almost as new but in the core of the plug it is full of carbon. Can't say I have ever seen a plug like this, if it is going to carbon up the plug will usually be black. Motor has very slight smoke from the exhaust, no more that I would expect,not sure if a fuel or oil problem. First pic is looking directly into the end of the plug. Any thoughts?
