This weekend I went out on the lake in my boat. I always check to make sure the water pump is working, but later on that day apparently at some point it quit on me. I was never in any mud or anything to clog it up. I was going down the lake and looked back to see my motor starting to smoke. After sitting there for 3 hours and letting it cool off, I recranked it and the water pump and the motor all seemed to be working fine. While iw as loading my boat I reached my hand back there to so how hot the water was coming out of the drain and the water all of a sudden quit coming out? My questions are, what would cause my water pump to go in and out like this, and could i have done any serious damage to my motor when it overheated. It seemed to run fine on the way back to the ramp. But the fact that it got hot enough to smoke has me worried.