Upon looking at my duck boat before the season , i found that it was overheating , i ordered a waterpump kit and a new thermostat and installed them myself test run the motor and it was still running hot although it was pumping water out the back i then removed the thermostat wich was still open at the time , and with the cover off started the motor to ensure that it ws pumping plenty of water , and it was i left the thermostat out put the cover back on and it still overheated , i then removed the head and replaced the gasket. the water jackets look very clean due to it being a fresh water motor started the motor and still the same problem hot hot .. I have plenty of water flow out the pisser tube . At this time i have done all i know to do , any ideas
Blocked passage in the water jacket? Cracked block bleeding exhaust gases into the water jacket? Timing too advanced? Fuel oil mix too lean?
