Mercury outboard water pump?

[braq]

Hi,
mercury 9.8hp.
installed a new water pump impeller and still no water circulating through engine. no blockage anywhere. now what???
i`m stumped at this point.

[RLT III]

take hose to tell tell off of motor and see if you can back flush start with a little pressure and then more if you need it the water should come out the bottom if not then it's blocked in the motor you have have done this but trying to help