D-400 series engine | |
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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)[1] |
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)[1] |
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[2] 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.[1][3]