The OB is a 2007 9.9. It had a strong smell of gas from the oil fill, so pulled the dipstick and gas came pouting out. Must be a quart or two. I haven't used it since I changed the oil last, so I suspect that the portable plastic gas tank expanded in the heat (vent was closed on it and it was connected to the OB), forcing a good amount of gas into the carb then into the oil reservoir. Does this makes sense? Is this expected or is something not working that should have prevented this?