I have an Evinrude Etec 250 H.O. on my boat and absolutely love it. It will troll under 2 MPH if desired for hours with no smell or smoking issues. Good on gas and uses very little oil. Goes like a bat out of hell when I want it to also! The new Rudes are solid motors!
BTW, Thurston's services Evinrude on Winni. They have a great service department and have treated me extremely well.