I had the motor out of my boat the other day to put a new pan gasget on it and turned the drive shaft with my hand and the pump sounded like someone was kicking a tin can down the street for a few seconds and then cleared up. sahft seems to be ok i.e. no up and down play. I put it on the water and was running down river the following weekend and thought I heard it again. sounded kinda like a rocker coming loose then quit again. Motor is fine. Not sure if the two sounds are related but anyone have any ideas? thaks in advance!!