Ford Lehman 120 - Are these good performance numbers?
Yesterday, we took our Defever 44 out for a run on the Sassafras River on the Upper Chesapeake. At full throttle both engines topped out at 2475 RPM. She was lightly loaded. A full load of fuel and water would add about 4,500 lbs. She is equipped with 25x20 props. Cruising speed was 1600 RPM, measured by phototac, and averaged 8.8 MPH up and down the river with negligible current and very little wind.