Check it out carefully first
MarkMaybe you should spend a day or two checking the boat out very carefully. Could be dead stuff, or the head, or the fuel or whatever.We had two odor sources on our used Hunter 27. The first was the head and holding tank hoses and lack of ventilation to the holding tank. Peggie's advice and the $8 a foot Sealand hose fixed that right up!The second odor was of diesel, and it was harder to pinpoint. I thought it was just blowby from the engine and that maybe a little blower in the engine compartment would help.But as it turns out, our diesel fuel tank was leaking. However, it wasn't a simple leak, it was actually quite weird: the tank had multiple pin holes in its bottom, and those pinholes were leaking very very slowly onto the piece of marine plywood that the tank sits on. The plywood was soaked (and still is quite wet) with diesel fuel! So although we got lots of odor, we didn't really get a visible pool of diesel fuel until the tank was professionally cleaned and the pinholes were unclogged! Geez, what a waste of $150.Anyhow, the tank is new, the smell is much diminished (not gone completely 'cause there is still some fuel soaked into the wood below the tank - way too hard to replace for the amount of odor it generates) and all is well.Good luck,Ron Vanderveer