I Have a 1995 90hp 3cyl Mercury outboard...Last fall I would get an intermitten solid alarm come on..The oil level was fine and it wasn,t over heating...This spring the alarm is constant...I unpluged the oil level sensor...didn't make any difference...The motor can be off for days and soon as it starts I get a solid alarm there is plenty of water comming out...It doesn't seem to be lacking oil as the exhaust is quit blue and the oil resorvoir does go down...Any suggestion would be appreciated