1966 9.5 evinrude still overheats

Discussion in 'Outboard Maintenance' started by riptide, Nov 11, 2010.

  1. riptide

    riptide Riptide Boat Works N.C.

    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
  2. Brett

    Brett > PRO STAFF <

    Blocked passage in the water jacket?
    Cracked block bleeding exhaust gases into the water jacket?
    Timing too advanced? Fuel oil mix too lean?