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  1. K

    Yamaha 50 HP 4 stroke outboard overheating. Cant solve problem

    Update. So installed new Thermostat and plastic bit found at the end of the tell tail which reduces the tell tail diameter. Started engine in a water container (better then with headphones). Still the same overheating problem after 5 mins on idle. My mechanic now wants to remove the engine...
  2. K

    Yamaha 50 HP 4 stroke outboard overheating. Cant solve problem

    Yes it possible that water isnt circulating all the motor and is exiting faster via the TT. Will install a new thermostat when stock arrives but i doubt that will solve the issue. There must be a blockage somewhere which i still cant find I will ask mechanic to change the pump housing and give...
  3. K

    Yamaha 50 HP 4 stroke outboard overheating. Cant solve problem

    Hi thanks for helping out. Im still waiting for a new thermostat, but my mechanic said the engine shouldnt overheat without a thermostat. My engine doesnt have a popper valve, checked this on service manual. Im really running out of ideas. Regarding pipe from pump to power head i am assuming...
  4. K

    Yamaha 50 HP 4 stroke outboard overheating. Cant solve problem

    Im hoping you can help me with my problem as i have run out of ideas. I have a Yamaha 50 HP 4 stroke outboard F50DET. Motor has been at me for 15 years with no major problems. Used the boat twice this summer with no problems, until a few weeks ago i drove into a bay and reduced the speed, after...
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