When I got my DR years ago, I hung a 58 18 horse evinrude on it. Very decent speed about 24MPH and good fuel economy. Used to cruise the ohio river from maysville to portsmouth with it, and had two 6 gallon cans mounted under the front cowling. My ship was set up originally as rear steer. After joining the original feathercraft website back around 2008 0r 2009 I went on a few of the first outings we had, The ohio river and lock below pittsburg, the three rivers cruise with John, then the cruise over to the town on the ohio river where the daggerboat races were hels, forget the name... When Russ and Cathy hosted the first original rivitpalooza, with seeing others ships, I found that speed was important to the other boaters, and I upped my power to a 1954 blue egg evinrude 25. I bought it up in michigan. It had a bad clutch dog, the real thinkind, and I replaced the entire assembly with a like new 1965 gearset. It has run all these years perfectly with zero problems. It also was contemporary as it was exactly what would have gone on my boat back when new, but also what was unique was it sat in mounted very close to the transom, and got that weight close right on the transom, rather than hanging out away from the stern which improves handling. The ship never did porpose, and planed in a second or two. With a 14 pitch prop, it gave a steady 31mph confirmed by GPS. It was a pull start which gave me stress once in a while, as I lack strength.
But overall I could keep up with about everybody, and outrun a few, but the overall idea was that it was only turning 4000 RPM to develope the 25HP! I still have that engine, and hope if my health returns to get it back on my heavily rivited ship, and out cruising again.
I have a DR that I am yet to match a motor with too. It will need to be aesthetically pleasing as well as matched to the size of the boat. Of course, this is subjective and beauty is in the eye of the beholder. I'm thinking of putting a 57' 30 hp Lark on it, but I reserve the right to change my mind 8 or 9 times before it is all said and done.
Marc, Not going to happen this year, most likely. I picked up a 1960 Lark 40hp from JR at Arrowhead. I have it on a stand but have not done anything but move it around the garage as it got in my way. Its a nice complete motor, kicks good on the rope, still had some fuel in carb bowl and leaks foot oil all over my garage. Its really last on my list of things to do around here but if I catch up on back logged work, run out of welding wire for my car projects, build the wife's green house and upholster the DR while on quarantine and need something else to do, it is it.
The Speeditwin weighs about 115-120 and produces 22.5 hp. A real torquey, low rpm motor so it jumps out off te water.
The starting drill is a bit much with no gear shift and manual spark and throttle, plus no rewind and a hefty rope pull. You felt like you were going to be like an old cartoon and go flying over the transom when the motor fired.
I would consider using a 57, 58 or 59 35 horsepower OMC. They are great looking Motors, run good, and have good power. I'll probably run a 10 and 3/8 by 14 in propeller. I'd have the steering up front.