I have a 2005 Mercury 60 HP 4 Stroke, I am getting a Engine Malfunction Warning on the Smartcraft Monitor. It seems to happen when the engine temp gets to the 170-174 degree range. The motor is "peeing water". I have been told by a dealer that I should change the water pump every 3-5 years. My nearest dealer is 3 hours away. Is this a job I could do by myself? Any ideas what else might cause this warning? There is under 200 hours on the motor.