Kohler Diesel Air-Cooled KD15-225

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Our air-cooled diesel engines are engineered with state-of-art air filters to increase durability and lengthen service intervals. Couple all of that with the engine’s cast iron cylinder liners and you’ve got a machine that doesn’t know how to quit.

  • New rugged design for the most extreme conditions
  • New integrated sound dampener provides reduced noise levels
  • Equipped with a larger air filtration cartridge with increased capacity
  • Cyclonic separator with one-way valve for dust discharge
  • Lowest fuel consumption
  • Lowest oil consumption
  • The widest range of accessories
  • Highest axial load (2000 N)


Engine Type

Four-stroke, aluminum cylinder head, automatic extra fuel starting system

Model KD15-225
Power[1] kw (hp) 3.3(4.5)@3600rpm
Displacement cm3 (in3) 224 (13.4)
Bore mm (in) 69 (2.7)
Stroke mm (in) 60 (2.4)
Maximum Torque[1] Nm (lb-ft) 10.4 (7.7)@2400rpm
Compression Ratio 21:1
Dry Weight kg (lbs) 28 (61.7)
Oil Capacity L (US qt) 0.9 (1)
Lubrication Full pressure w/full-flow filter
Dimensions LxWxH mm (in) 358 x 265 x 417
(14.1 x 10.4 x 16.4)
Emissions Compliance
  • No Regulations
Engine Type Commercial

1 Performances measured according to ISO 14396 without final intake and exhaust line. Actual engine performances may be affected by accessories (intake and exhaust line, charging, cooling fan, etc.), application, ambient operating conditions (temperature, humidity, and altitude) and other factors.