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C7.1 High Performance Propulsion Engine

The C7.1 marine propulsion engine is ideal for recreational boating applications, specifically smaller vessels and motoryachts ranging from 25 -60 feet in size. The engine features a common rail fuel system enabling optimum combustion and low emissions. The engines provide noticeably quiet operation due to reduced combustion noise through advanced electronic control. Additionally, no visible smoke is emitted from the C7.1 engines during operation.



  • Meet the new C7.1 Commercial Propulsion Engine
  • C7.1 Marine Propulsion Engine Walkaround



  • Ratings
    Spec Value
    Power Range 400 bhp - 500 bhp (298 bkW - 373 bkW)
  • Engine Specifications
    Spec Value
    Speed Range 2900 rpm
    Rotation from Flywheel End Counterclockwise
    Bore 4.13 in
    Stroke 5.31 in
    Aspiration Turbocharged, aftercooled
    Displacement 428 in³
    Configuration In-line 6, 4-Stroke-Cycle Diesel
    Emissions IMO II, U.S. EPA Tier 3, RCD II, China II
  • Dimensions & Weights
    Spec Value
    Width - Engine 31.4 in
    Height 34.5 in
    Engine Dry Weight - Approximate 1676 lb
    Length - Engine 43.1 in

Standard Equipment


  • Water cooled turbocharger and exhaust manifold
  • Common rail fuel system
  • Corrosion resistant sea water aftercooler
  • Closed crankcase ventilation system
  • Starter motors - 12V or 24V
  • Fuel cooler
  • Integral engine oil cooler
  • Vibration damper and guard
  • Electric fuel priming pump
  • Self-tensioning multi-vee alternator drive belt
  • Gear driven sea water pump (rubber impeller)
  • Fin and tube type jacket water heat exchanger
  • Front and rear engine mounting brackets

Optional Equipment


  • Alternators - 24V 140 amp - 12V 175 amp
  • Transmission gear oil cooler (engine mounted)
  • Instrument Panels
  • Glow plugs
  • Jacket water heater
  • 6" water cooled exhaust elbow
  • Isolation mounts
  • Primary fuel filter/water separator (remote mount)
  • Selection of factory-fitted marine transmissions and oil hoses
  • Cabin heater (calorifier) connections
  • Triple groove PTO pulley (crankshaft mounted)
  • Flexible fuel hoses
  • Right-hand and high level left hand oil dipsticks