Join Date: May 2002
Location: East Coast
Thanked 6 Times in 6 Posts
Rep Power: 17
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 again...it 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.