aerobob,

I pulled the plug and checked the color of the ceramic on the plug and its a tan color and black around the outer bottom surface of the plug. I'm really hoping this works so I can get some serious flying in . I don't know why I'm the only one having trouble with air flow. Jstanton has the same plane with the 25cc and has no problems and plenty others were the velocity stack sticks outside the cowl. I'll just keep plugging away until I figure it out.