below when I open the companion-way and go below after the boat has been closed up for a week. I have two (2) solar powered vents with 4" fans, one drawing air into the forward salon area and one exiting air above the galley, so I usually have good air flow through the interior of the boat on most days (we have a lot of sunny days down here). The bilge is clean with no sign of oil or fuel, there is no water, oil or fuel below the engine in the engine bilge area and I have wiped the engine down with a rag dampened with mineral spirits. Is it possible that my fuel hose between the filler cap and the fuel tank could be allowing fumes to escape through it? There is no leakage of fuel when topping up, but if I fill clear to the top, the hose appears damp as if it is soaking through. It is pretty old,and has hardened somewhat. After returning from a sail and perhaps 10-15 minutes of running the engine, the odor is noticeable, but not unconfortabley so (although it annoys my wife). Is this normal with any diesel powered craft, when the engine is enclosed but housed below? While sitting at the dock after the boat has been opened up, the odor is generally not noticable. I am thinking of running a 12V exhaust fan with ducting from the engine area to a vent at the stern of the cockpit. Am I over-reacting? Jeff