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post #15 of Old 08-27-2007
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FWIW...we used the muriatic acid treatment on a Yanmar Diesel w/ heat exchanger. We had NO problems whatsoever with it and our engine AND the treatment was recommended by a guy who was Yanmar certified. I would imagine leaving it in the engine long term would not be helpful but only stays in for a few minutes and then is thoroughly flushed out by the engine running.
Won't help remove rubber impeller pieces from the heat exchanger but does a good job on scale.
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