was you driving it around without the muffler/spark arrestor? They will spark and shoot flames out of the head pipes, since they are so close to the cylinders.
Well... there's your explanation. The seafoam is cleaning out some of the carbon buildup.but with some juice and a pint of seafoam it's running (but sparking).
Running rich means there is more gasoline in the mixture than optimum. Lean is just the opposite, less gas than optimum. Lean mixtures burn hotter, and can damage your engine. Very rich mixtures give black exhaust smoke, and build up carbon in the combustion chamber.I am not really sure what is the difference between running rich or lean is. Can you fill me in?
Is cleaning (I assume you mean the cylinder) head a hard job? Any information on how to do this would be greatly appreciated.
Glad to help. Like my sig. says:Thanks for the explanation.
I'll run it on the black top for a while until the sparks subside.