1981 evinrude 9.9 waterpump will not pump

[napaman1]

i replaced the water pump twice once just the impeller ,second time with complete kit . i do not know the history of the motor because it is a friend of mine can i check anything before i give up sorry i do not have more info but i will get it thanks

[SEAHORSE]

If it overheated severely in the past, the water tube rubber grommet under the powerhead could have swelled up, charred, and blocked the water flow.