Kohler Engines. Relentless Power. Legendary Performance.

Kohler Diesel KDI Mechanical



Available for sale outside the U.S. and Canada only, the KOHLER 1903M 42 hp, 3-cylinder engine is compatible with high-sulfur fuels and is liquid-cooled with direct injection and oil control. This 4-valve-head engine is loaded with features and delivers solid performance, backed by a 3-year warranty.

Fuel Type
55 Horizontal Four Liquid Diesel Current

Professional Grade Design.

Liquid-cooled with direct injection, oil control, and high sulfur fuel compatibility, this powerful 4-valve-head engine is not available for sale in the U.S., Canada and E.U. It offers the many features of the common rail model but does not have a common rail or EGR.


User-Friendly Maintenance.

  • One side service
  • 500 hour oil change intervals

High Power Performance.

  • 4 valves per cylinder

Quiet, Smooth Operation.

  • Hydraulic valve lifters
  • Straight tooth gear reduced pitch
  • Liquid-cooled

Reliability and Long Life Design.

  • Cast iron crankcase with vibration-absorbing bed plate
Engine Uses

Engine Type:

Four-stroke in-line, cast iron block

Diesel KDI2504M
J1940 Power hp(kW) 1 55 (41)
Displacement cu in (cc) 151.4 (2482)
Bore in (mm) 3.5 (88)
Stroke in (mm) 4 (102)
Peak Torque lbs. ft (Nm) 125.4 (170)
Compression Ratio NA
Dry Weight lbs (kg) 536.8 (244)
Oil Capacity U.S. quarts (L) 11.9 (11.3)
Lubrication Full Pressure
Dimensions L x W x H in 27.7 x 17.8 x 26.3
1 Power (hp) and Torque (lbs ft) specifications for Kohler general purpose engines are rated pursuant to Society of Automotive Engineers (SAE) J1940 based on gross output testing performed according to SAE J1995 without the air cleaner and muffler. Actual engine power and torque are lower and affected by accessories (air cleaner, exhaust, charging, cooling, fuel pump, etc.), application, engine speed, ambient operating conditions (temperature, humidity and altitude) and other factors. This J1940 / J1995 rating provides consistent measurement to customers who may want to control the intake and exhaust features of the engine. For more information, contact Kohler Co. Engine Engineering Department. Kohler Co. reserves the right to change product specifications, designs and standard equipment without notice and without incurring obligation.