(1995, v-4, 90hp, 90 deg.) Got my friends boat running the other day, it has sat along time without being ran. And the head gasket edge is rusted. With a water hose hooked up, water seeps out externally at the top of the head, along the rusted edge. Im pretty sure nothings getting into the cylinder, just an external leak. None the less it needs head gaskets. Are there any things I need to be aware of before this repair. It looks like a simple gasket to do. Following info from a seloc manual.![]()