D-400 engine
| D-400 series engine | |
|---|---|
Restored Masport Iron Horse engine | |
| Overview | |
| Manufacturer | Outboard Marine Corporation (OMC) Lawn-Boy |
| Also called | Iron Horse |
| Production | 1954--1977 |
| Layout | |
| Configuration | Single-cylinder 2-stroke |
| Displacement | 108.99 cc (6.651 cu in) |
| Cylinder bore | 60.325 mm (2.3750 in) |
| Piston stroke | 38.1 mm (1.50 in) |
| Cylinder block material | Aluminum |
| Cylinder head material | Aluminum |
| Compression ratio | 4.5:1 |
| Combustion | |
| Fuel system | Float carburetor |
| Fuel type | Petrol |
| Oil system | 16:1-32:1 pre-mixed fuel:oil mix |
| Cooling system | Air-cooled |
| Output | |
| Power output | 3.5 hp (2.6 kW) |
| Chronology | |
| Successor | D-600 |
The D-400 series engine or the Iron Horse engine was a light-duty two-stroke engine used for powering lawnmowers produced from the 1950s to the late 1970s. D-400 engines were single-cylinder engines designed and manufactured by the Outboard Marine Corporation (OMC; Johnson and Evinrude) for Lawn-Boy and Masport. The D-400 engines displaced 109 cc, generated 3.5 hp (2.6 kW) of power, and operated in the range of 2400-3300 RPM.