Re: Impeller
Just run it until it fails. How else do you expect dealers to sell pistons?<br /><br />If the motor is new to you, change the entire kit. Not just the impeller. Do a complete cooling system service. Now you have the baseline water pressure. Anytime it starts to change from your baseline its time to find out why. Its not unusual for a pump to last 100 hours. Less if you run in sandy / silty water or you only use the boat once a year.<br /><br />Good luck!
