I have a 1995 15hp 2stroke merc and i'm doing the water pump replacement kit on it.I know that your suppose to put a little grease on the impeller before installing and the spline of the shaft.What about were the new gasket goes or around the new gasket plate or any of that stuff?If i put a lite coat of grease on the whole area will it hurt it or is it needed?I believe i have seen most of them done just with the spline and impeller being lightly greased,is this correct?I'm going to replace the gasket,metal plate,key,impeller and washers i think comes with the kit.