Join Date: Apr 2008
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There are several conceptual points behind a marine exhaust elbow. Nigel Calder says to comply with all these points, an elbow should be made of Tungsten, unnaceptable due to price. In fact, diesel exhaust combined with saltwater produce a strong jet flow of sulfuric acid at just the elbow. That's why even stainless steel can't hold the punishment. Even risking an internal puncture on a water-cooled elbow, injecting water way below the elbow will create an unwanted high temp spot.
Beneteau Oceanis 43
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