I have a 1974 50hp Evinrude that I just recently rebuilt the carbs on. The rebuild kit didn't have the float level adjustment so I just left the float levels the way they were. I can start the motor and after about 10 seconds it dies. The carbs appear to be flooding out. I've taken the bowls off the carbs and they are full of fuel. A friend let me try his carbs that we know work on his same type motor on my motor and my motor caused them to flood out also. 
