1.) have you checked the oil. if you have a blown head gasket you will end up
with water in the oil see if its milky in color on the dip stick.
2.) Your impeller might not be up to par to keep the engine cool. What was the
engine temp?
3.) was the water coming out at a study flow from the exhaust or was it all
steam and not water or very little?
4.) the water "spray" you got if a very good chance it came from the water that
got in to a uncovered Carb. Careful there you might have something rusted up in
the intake area.