Davey,
I'm sure you did not hurt your Yamaha motor. You would have heard a very loud alarm go off if your motor started overheating. there is nothing you should do other than make sure you have a good steady stream coming out of the "P" hole when you run it. If you have not read your owners manual yet, I would recommend doing so.It was very informative when I bought my first 4 stroke Yamaha. Enjoy your skiff and let us all know what you think of it. Numbers such as speed at WOT and handling when you get a chance. It is a new model and a lot of us are interested in hearing about it.
John D.