How do you know when your waterpump (is that Impeller?) is busted?

[DennisW]

[blue][size 2]Hey Paul, I read in Bass & Walleye Boats magazine, I think, that a strong pee stream does not necessarily indicate that your impellar is pumping enough water through your block to cool the motor. So with a failing impellar, you could still have a good pee stream but still not be cooling your motor sufficiently.[/size][/blue]

[blue][size 2]Teroy has the right idea--change it regularly and then you don't have to worry about it.[/size][/blue]