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C7.1 Marine Propulsion Engine (U.S. EPA Tier 3 / IMO II)

C7.1 Marine Propulsion Engine (U.S. EPA Tier 3 / IMO II)



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



  • Power Rating
    Spec Value
    Power Range 280 bhp - 425 bhp (209 bkW - 317 bkW)
  • Engine Specifications
    Spec Value
    Speed Range 2300 - 2700 rpm
    Emissions U.S. EPA Tier 3, IMO II, RCD II, China II
    Configuration In-line 6, 4-stroke-cycle diesel
    Displacement 428 in³
    Aspiration Turbocharged-aftercooled
    Governor Electronic (A5E2 V2 ECM)
    Flywheel Housing SAE No. 03
    Bore 4.13 in
    Stroke 5.31 in
    Refill Capacity 20 L (5.3 gal)
    Oil Change Interval 500 hrs
    Rotation Counterclockwise from the flywheel end
    Cooling Heat exchange or keel cooled
  • Dimensions & Weights
    Spec Value
    Dry Weight 1676 lb
    Height 34.5 in
    Length 43.1 in
    Width 31.4 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 seawater pump (rubber impeller)
  • Fin and tube-type jacket water heat exchanger
  • Front and rear engine mounting brackets

Optional Equipment


  • Marine Classification Society (MCS) Approval ABS, BV, CCS, CRS, *DNV-GL, IRS, LR, Class NK, PRS, RINA (*DNV-GL approval available for keel-cooled engines only)
  • SOLAS double wall high-pressure fuel lines
  • Engine mounted bilge pumps and auxiliary water pumps with electromagnetic clutch
  • Engine-mounted secondary alternator - 24V 55 amp or 12V 100 amp
  • Analogue gauge displays
  • Transmission gear oil cooler (engine mounted)
  • Glow plugs
  • Jacket water heater
  • Various 5" and 6" water cooled exhaust elbow configurations
  • Cabin heater (calorifier) connections
  • Right-hand and high-level left-hand oil dipsticks
  • Mechanical throttle converter for repower