A292A5D8-1454-4221-8AAD-E4C8E654C412.jpegAnyone know what might be causing one of my spark plugs to have a milk colored oil on it? It has been running rough lately. When I accelerate it will not get above an idle even at full throttle. I pulled the plugs and one of them had water/oil mixture on it. My first thought was a cracked head gasket, but I did a compression check and all cylinders ranged from 104 to 110. I would appreciate hearing any ideas you might have. Here is a pic of the plug. The engine is 1999 200hp EFI with Boysen Reeds. Serial # 06897131.