It may have cracked the housing where the water pump is....

Change the oil and hook it up to a watering hose,without starting the motor let the water flow though the engine for several mins.After several mins. start the engine and let run for a sec or two and shut if off.Check your oil,if its milky you have problems,could be just a gasket...hope so.It wouldn't hurt to drop the lower unit and replace the water pump if it hasn't been changed in a while.