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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I used to rev up the motor to keep it from stalling and put small amounts of water down the carb. you should see a lot of steam coming out of the exhaust but that is OK. just don't pour all the water at once. it will clean out the pistons pretty good.
