Boat ran fine then started alarming (overheating). While on the water checked the pee hole as it had not been used in several months, got some debris out of it and it was fine fora while. Ran back to the ramp and it started alarming again. Put it on the trailer and took it home. Put muffs on it after it had time to cool down and could not get any water from the pee hole. Is this the impeller ? If so how hard is it to get one and change it out. All the repair places are 3 to 4 weeks behind and don't want to wait that long if I don't have to. thanks in advance.