Running biodiesel will further reduce engine noise along with the common rail fuel delivery in newer diesel engines. Is it even available at fuel docks, I haven't noticed. Biodiesel (B-20) is hard to find for my Ford F250. I would imagine even less common on the water.
I read a little on the new Yanmar engine from an online reviewer that pointed out the engine was not to be run at extended time at low rpm's. This is also something to avoid on other diesel engines because a condition named wet stacking. Bill Dakin S/V Tapestry 25MKII
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