1966 9.5 evinrude still overheats

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

  1. riptide

    riptide Riptide Boat Works N.C.

    171
    4
    343
    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?