mercury optimax 225 2005

[lias]

today after a few minutes, my 225 2005 optimax, is warmed suddenly and the alarm is activated, stop and water from the drainage of the engine went out hot, start it in minutes and not is warmed more, because is warmed, thank you

 

[lias]

other problems, clock temperature I had did not work, I put a new one, and does not work the new, where can I find this wire on the engine, how it works, the temperature in this motor