If you are mechanically inclined you can do it yourself. As suggested, look it up on YouTube. The part is cheap. So you need to weigh 2 hours of labor and $30 against getting stuck in the middle of a lake or several miles down river, or an engine overheating and ruining it, or a piece of the old brittle impeller break off and get stuck in the water jacket. Let me think -- spend $30 or . . . -- never mind