Water Pump

[Zebra]

Has anyone ever changed there own water pump in the lower unit. I started my engine this afternoon and noticed it did not have its normal strong piss. gotta hate that... ck. the pee hole for gravel it was clear. Than i got up into the boat and my temp guage was all the way hot so i shut it down right away. It' been about a yr since i had the water pump changed out could it need a new one already. So again i ask, has anyone done this job themselves and how hard is it...