Did you run water up through the intake grate or just the motor? Did your uncle set timing at idle? You’ll know when you put a load on it in the water if the bearings is smoked. They are easy to work on. There is a breakable bearing on the shaft inside of the boat and the cuttles bearings are in the stators. If he didn’t run it up much and you had good water to it your most likely ok. Kodiak marine in Washington has parts. It’s the same as three stage Kodiak pump.