Join Date: Jun 2011
Location: somewhere south of civilization
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Re: Engine Ventilation Fan always on
As mentioned above, diesel engines consume a great deal of air when operating. Just to give you an example, one vessel I operated had a Gardner 8LX and several generators in a real engine room. Being built in NZ for trips to Antarctica it had a sealed engine room and needed intake fans for the engine and gensets to run. It also had a waterproof door. When the fans were on and the engines not running, it took my full weight against the door to close and dog it, but when the engine was running, I could close the door with one finger.
Very few if any of us have airtight engine rooms, therefore there is plenty of air is getting in to power our small diesels. No additional fans are required. I believe the reason for engine room exhaust fans is to exhaust heat from the engine space after running or remove smoke, engine exhaust or steam when a problem occurs.
Perhaps the OP on the boat in this thread had an exhaust leak he was too lazy to fix and the running the exhaust fan was his solution. I don't know. So many of us find odd systems on the boats we buy.
"Any idiot can make a boat go; it takes a sailor to stop one." Spike Africa aboard the schooner Wanderer in Sausalito, Ca. 1964.
“Believe me, my young friend, there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats.” ― Kenneth Grahame, The Wind in the Willows
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Last edited by capta; 06-27-2019 at 02:02 PM.