New Best on Friday Night!

When I saw the plug my first thought was a rich carb and too hot a plug.

The plug looks ok at the end and center porcelain butreal rich at the base , so this usually means the engine is too rich but the plug is hot enough to burn it off.
Well, when you lean it down to cure the richness that plug is going to get hotter.
Not a good thing if it's already hot enough to burn off the richness with the mixture you are running now.

Did that make it more confusing or did I explain that ok? :D