Rain, I have a slightly different philosophy, I use the dinghy motor (3.5 hp Merc 2 stroke--30 lbs) as the Kicker--it will run the boat at 3.5 to 4 knots in calm water--and you can steer the boat with it in almost any weather, as long as you are going across or down waves--it is just to get us to a safe place--may not always "get home". We carry independent fuel, since fuel is often the item which causes engine failure. I have pushed a 62 foot, 65,000 lb boat 2.5 knots with a 4.5 hp on a dinghy--it gave us steerage, and kept us safe, until we resolved the main engine issue. Even the Torpedo will push the C Dory at 3 knots.