How do I identify this motor?

[echou]

I got this motor second hand, and don't know anything about it. There are no logos or names, just a few serial numbers. Any thoughts on what it is?

 

[racerone]

Serial # does not matter. What is the model # ??---------That would be a 6 HP evinrude and it looks to be about a 1968 /70 model.----------Actual year does not matter as most parts were the same year after year.