Kohler Diesel Air-Cooled KD625-2

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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
  • Equipped with a larger air filtration cartridge with increased capacity
  • Cyclonic separator with one-way valve for dust discharge
  • New integrated sound dampener provide reduced noise levels


Engine Type

Four-stroke, integral fan air cooling, aluminum alloy independent head, electric start, direct injection

Model KD625-2
Power[1] kw (hp) 18.8(25.5)@3000rpm
Displacement cm3 (in3) 1248 (76.2)
Bore mm (in) 95 (3.7)
Stroke mm (in) 88 (3.5)
Maximum Torque[1] Nm (lb-ft) 52.5 (38.7)@2000rpm
Compression Ratio 17.5:1
Dry Weight kg (lbs) 110 (242.6)
Oil Capacity L (US qt) 2.6 (2.8)
Lubrication Full pressure w/full-flow filter
Dimensions LxWxH mm (in) 633 x 557 x 599
(24.9 x 22 x 23.6)
Emissions Compliance
  • Tier 3
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.