Discovery Energy KDW 702 (2600 Const)

The type designation gives displacement and cylinder count: KDW 1003 is the 1.0-litre three-cylinder, KDW 1404 the 1.4-litre four-cylinder, and the smaller KDW 502 and 702 are one- and two-cylinder engines of the same family. The suffixes in brackets – 1500, 1800, 2200 to 3600 RPM, 'Const' for constant speed – denote the speed variants for which the engine is certified; 1500 or 1800 rpm typically means generator sets at 50 or 60 Hz. The register lists 38 versions with 6 to 18 kW at 1,500 to 3,600 rpm and 31 to 79.6 Nm of torque, all with indirect injection and naturally aspirated; certifications run from model year 2012 to 2026.

Applications are small generator sets, trailer refrigeration units, sweepers, lawn and municipal tractors, compact loaders and boat engines – wherever a quiet, low-vibration small diesel with a small footprint is needed.

When buying, the cooling system (liquid cooling needs a radiator and thermostat, which often clog on compact machines), the glow plug system and valve clearance count; the engines are simply built, and parts are available through Lombardini, Kohler and Rehlko dealers.