That's not the best picture for me to use to make this proclamation but unless there's much more bracing that I can see, you need to do some extra work on that transom before you even consider putting an outboard on it. I wouldn't put much of a motor on it. It's better to go slow, than to sink.....

If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then will I hear from heaven and will forgive their sin and will heal their land. 2 Chronicles 7:14