2020 Yamaha F150 outboard impeller replacement

Time for annual/100 hour impeller inspect and replace on the main outboard that I’m doing prematurely because I power loaded the boat and it ran out of water approx 30 seconds, noted it took just over 4 seconds for coolant water to discharge and it was low flow when it typically discharges in less than a second, has hard stream. Better safe than sorry.