Right now I have a evinrude 5.5 on my 16' jon. My girlfriends grandpa who sold me the boat has an 82' or 84' 9.9 evinrude. He has offered to trade me for my 5.5 (1962) plus $450.00. Now he takes very good care of his equipment and is or was an evinrude tech. He is also a preacher lol. So I think he is trying to jip me. Any Ideas, or questions I should ask him. I did borrow it over the summer, and where i live i have docked all summer in the back yard. the limit on that water is 10hp and I think it would work well enough to be safe on the river. What do you guys think?