Removing carbon from heads and pistons.
Surely this is RV related since it is cutting into my recreational time. :h My 2 cyl opposed Briggs in the lawn tractor has progressively gotten noisier. It was knocking sort of like the same musi...
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In the old days when we were building hot rods out of the old 50s 6 cylinder chevys, we would take the breather off and rev the engine up pretty tight and then slowly pour a bag of white rice down the carb. Could not go too fast cause if you let her stall, you had a mess. Just keep it revved until all the rice quit coming from the exhaust. It worked, but I never saw a Chevy dealer do this.
