Re: I have another boat in my sights. UPDATE 12-11-2010 New pictures.
Re: I have another boat in my sights. UPDATE 12-11-2010 New pictures.
Looks, to me, like an old oil leak. Could also be old oil left there from a sloppy, careless oil change. Motor placement on some boats makes it so difficult to access the oil filter, that the owner will put rags under and around the oil filter and just let the oil dump; and then clean it up. I've known a couple of people over the years who did this. One of them didn't even use rags or clean it up. He pulled the plug and let it rinse/drain into the bay
. No, he was not my friend, nor did I like him or even associate with him. He, unfortunately, occupied the slip next to one of my dive buddies in New York. Anyway, the oil theory is only one possibility. It could be your best case scenario, or could even be something more minor than that. Have you even asked the seller for an explanation? You didn't mention whether or not you did... Whatever it is, though, you need to really check carefully for transom rot around the outdrive where that ominous staining is going on. Question the seller about these things and let us know what he tells you. Best of luck.
Safe and happy boating always!!!