How many tanks of FP to clean out small engine?

[SteveD2]

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Originally posted by MolaKule:

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I have an old 3.5hp lawnmower engine that is nicely carboned up.

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Surely you jest. The only carbon is around the valves, which is normal. It appears the piston and CC head have been cleaned already. Your engine appears to be using a slight bit of oil and /or running rich.

Suggest you bottom the piston and pour 2 oz. of LC on it and let the LC dribble past the rings. Pour LC on the valves and valve stems as well and soak. Brush off carbon after soaking.

Replace spark plug. Replace head gasket and bolt head and fire her up!

This engine is very clean compared to many I have seen.

Use FP in the fuel and I doubt you will see any future carbon deposits.

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Am I not speaking english here? I KNOW THAT'S NOT ALOT OF CARBON! I already said I cleaned it out not long ago. I'm not doing this because I want the engine to be clean. When I'm done with this test the engine will probably be going to the dump. You can't just go down to the store and buy a carbon covered engine. This is the best I can do right now. All of the engines in my power equipment are this clean or cleaner since I regularly remove the head and clean them.