81 15hp evinrude 
replaced impeller used three times no problem next time 20 mins out motor started to get hot put motor in reverse water quit coming out **** tube went back to mechanic replaced thermostat water came out till rev engine up down and water stop coming out **** tube mechanic says it could be pick up tube rubber grommet under block corroded partly closed or lower piston has hot spots engine starts an runs real good no problems just over heating big joe
replaced impeller used three times no problem next time 20 mins out motor started to get hot put motor in reverse water quit coming out **** tube went back to mechanic replaced thermostat water came out till rev engine up down and water stop coming out **** tube mechanic says it could be pick up tube rubber grommet under block corroded partly closed or lower piston has hot spots engine starts an runs real good no problems just over heating big joe