I have a 1990 90 H/P Force L drive engine, The number 3 cylinder has water in it and when you try to start it with the spark plugs installed, water is pushed out the front of motor around the gasket area. I pulled the plug and it blows out water in the number 3 plug hole. It was over heated for apx. 5-10 minits.( water pump blew out) Is this a gasket problem or something more major? 