My 70 HP Evinrude boat motor has a problem. After the winter storage I cranked her up and she runs OK, but she's getting water in the lower cyclinder. Now, as far as I can tell, it can't be a head gasket because the is no passage back to the combustion chamber for the coolant. It's coming into the engine from the intake or the exhaust ducts in the cylinder wall. Anyone have any ideas?