BUKH D4 / 175-320 HP

BUKH solas marine engine

175 - 320 hp (129 - 235 kW)

Bukh´s 4-cylinder D4 is developed from the latest design in modern diesel technology. The engine has common rail fuel injection system, double overhead camshafts,

4 valves per cylinder, turbocharger and aftercooler. Together with a large swept volume and the EVC system (Electronic Vessel Control), this results in world-class diesel

performance, combined with low emissions. The engine is extremely compact for its high output.


Following powerrange is avaliable:


BUKH D4 - 175 HP (129 kW)

BUKH D4 - 230 HP (169 kW)

BUKH D4 - 270 HP (199 kW)

BUKH D4 - 300 HP (221 kW)

BUKH D4 - 320 HP (235 kW)



BUKH D4 - 230 HP (169 kW)

BUKH D4 - 270 HP (199 kW)

BUKH D4 - 300 HP (221 kW)

BUKH D4 - 320 HP (235 kW)

See below download for product spec.

Technical description

Engine block and head

  • Cylinder block and head made of cast iron
  • Combined ladder frame and balance shafts
  • 4-valve technology with hydraulic lash adjusters
  • Double overhead camshafts
  • Oil-cooled pistions with two compressionrings and one oil scraper ring
  • Integrated cylinder liners
  • Replaceable valve seats
  • Five-bearing crankshaft
  • Rear-end transmission


Engine mounting

  • Flexible engine mounting


Lubrication system

  • Easily replaceable separate full-flow and bypass oil filter
  • Seawater-cooled tubular oil cooler


Fuel system

  • Common rail fuel injection system
  • Control unit for processing the injection
  • Fine filter with water separator and alarm


Air inlet and exhaust system

  • Air filter with replaceable insert
  • Crankcase gases vented into the air inlet
  • Exhaust elbow or exhaust riser
  • Freshwater-cooled turbocharger
  • Loss of sea water alarm


Cooling system

  • Thermostatically regulated freshwater cooling
  • Tubular heat exchange with separate large volume expansion tank
  • Coolant system prepared for hot water outlet
  • Easily accessible seawater impeller pump


Electrical system

  • 12V two-pole electrical system
  • 115A marine alternator with Zener-diodes to protect the system from peak voltage, and integrated charging regulator with battery sensor cable for maximum use of alternator
  • Fuses with automatic reset
  • Auxiliary stop button



  • Complete instrumentation/display packages, including e-key
  • Electronic shift and throttle avaliable
  • Plug-in connections



  • Shaft drive
  • Water jet

Number of cylinders 4
Bore and stroke 103/110
Charging alternator 115A
Net weight 483
Model D4
Compression ratio 17,5:1
Engine crankcase vent syst Closed
Engine duty rating Avaliable in C12 - High Speed Craft Commercial_3 / C9 - Special Light Duty Commercial_4
Output [ps(kW)] acc. to ISO 8665 180 (132) / 225 (165) / 260 (191) / 300 (221)
Displacement [cc] 3700
Injection system Common rail fuel injection system
Alternator [A] 115A - Marine Alternator
Electronic engine diagnostic YES
Propulsion system Shaft drive / Water jet
Titel Type Størrelse Download
BUKH_D4-180_A4.pdf PDF 2.48MB Download
BUKH_D4-225_A4.pdf PDF 2.48MB Download
BUKH_D4-260_A4.pdf PDF 2.48MB Download
BUKH_D4-300_A4.pdf PDF 2.49MB Download
009M7403.pdf PDF 213.28KB Download
009M7400.pdf PDF 200.33KB Download