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Old 12-02-2011, 02:02 PM
Carl-T705 Carl-T705 is offline
 
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You are correct, if the vapors can seek the lowest point (bilge) that is where the blower needs to draw from. If you simply want to exhaust heat and fumes from the engine, when running, which is a great idea , put a second blower in, drawing from the top side of the engine to do this. Since bilge pumps are generally submerged when they are needed to run I wouldn't be to concerned about it igniting fumes. BUT If you are on the boat, you should turn on the blower before turning anything spark producing on. Good Luck
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