Originally Posted by mowerknower
Running lean is a more likely reason for the heat and by looking at the valve seat in that pic I would not think rich running. Could be a cooling fin.
Sure it could be fat!! He could be pumping so much fuel into it that its burning super hot in the exhaust!! He never said how it idled!!
I just figured running lean would be to simple of an explanation cause I like to think outside the box.
Really, I don't know why I put down rich.