450 – 550 HP (330 – 404 KW)

The BUKH D8 is a reliable, powerful, fuel-efficient and clean marine diesel engine. This 7,7 litre diesel engine has common rail fuel injection, 4 valves per cylinder, twin entry turbo and charge air cooler.
All together with the electronic engine management system results in a very smooth running engine with world-class diesel performance, combined with low fuel consumption and low emission levels.


Engine block and head

  • Cast iron cylinder block
  • One-piece cast iron cylinder head
  • Ladder frame fitted to engine block
  • Replaceable dry cylinder liners and valve seats/guides
  • Drop forged crankshaft with induction hardened bearing surfaces and fillets with 7 main bearings
  • 4 valve per cylinder layout with overhead camshaft
  • Each cylinder features cross-flow inlet and exhaust ducts
  • Gallery oil cooled cast aluminium alloy pistons wtih three piston rings
  • Rear-end transmission

Engine mounting

  • Flexible engine mounting

Lubrication system

  • Seawater-cooled tubular oil cooler
  • Single cartridge type oil filter, easy to replace, with no spillage

Fuel system

  • Common rail fuel injection system
  • Gear-driven fuel pump and injection timing
  • Electronically controlled central processing system (EMS – Engine Management System)
  • Single fine fuel filter of spin-on type, with water separator and water alarm

Air inlet and exhaust system

  • Mid-positioned twin entry turbocharger with aftercooler
  • Air filter with replaceable inserts
  • Wet exhaust elbow/riser (option)
  • Loss of sea water alarm

Cooling system

Two options available:

1. HE(Heat Exchanger)

  • Seawater-cooled tubular heat exchanger
  • Coolant system perpared for hot water outlet
  • Coolant system prepared for hot water outlet
  • Easily accessible seawater pump in rear end

2. KC (Keel Cooling)

  • 1,5-circuet cooling system
  • Belt-driven centrifugal cooling water pump in HT circuit
  • Gear driven rubber impeller cooling water pump in CAC LT circuet

Electrical system

  • 24V with extra 12V/115A or 24V/80A alternator


  • A type-approved system that fully integrates the engine, electronics and the unique set of EVC features
    Plug-in connectors
    EVC system color display – Optional


  • Shaft drive

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