I have a 260 mercruiser that sits in a 1985 sea ray cuddy. Ive been trying to narrow down a engine oil leak that leaves a mess in the bilge after a day out in the water I added some dye to oil because I just could not find it on a black engine. It appears to be dripping from behind of the oil pan, Ive never had a boat engine out before but I believe that would be the bell housing, its kind of hard to see down there but with a mirror and flashlight it looks to be coming from a plate bolted to housing. Does this sound like a rear main seal gone bad or are their any other options to look at.