2.5HP Mercury OutBoard 10mph up river!! In Flood Waters!!!

I found a great deal on a 2.5hp mercury on Craigslist and decided to purchase it for my small backwaters boat. I was worried after a few buddy's told me it would barley make it up river. All I can say is I'm as happy as I can be. She ran 9.9mph up river in Flood waters and almost 13mph back down riv...