ORIGINAL: Josey Wales
I thought carbon buildup on the piston was not good or did I misunderstand?[X(]
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Normal running accumulations are not problematic, because it will be minimal. You will do more harm to the engine cleaning it than any benefit you could realize from removing the normal carbon accumulations.
Just oil the engine up really good after the flying season with Automatic Transmission Fluid or Air Tool Oil and keep it wrapped up and out of harms way.