New CAT Equipment

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.

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    Learn more about the C7.1 High Performance Propulsion Engine

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    • Dimensions & Weights
      Engine Dry Weight - Approximate
      1676 lb
      Height
      34.5 in
      Length - Engine
      43.1 in
      Width - Engine
      31.4 in
    • Engine Specifications
      Aspiration
      Turbocharged - Aftercooled
      Bore
      4.13 in
      Configuration
      In-line 6, 4-Stroke-Cycle Diesel
      Displacement
      428 in³
      Emissions
      IMO II, U.S. EPA Tier 3, RCD II, China II
      Rotation from Flywheel End
      Counterclockwise
      Speed Range
      2900 rpm
      Stroke
      5.31 in
    • Ratings
      Power Range
      400 - 500 bhp (298 - 373 bkW)
    Exhaust System
    • Water cooled turbocharger and exhaust manifold
    Fuel System
    • Common rail fuel system
    • Fuel cooler
    • Electric fuel priming pump
    Cooling System
    • Corrosion resistant sea water aftercooler
    • Gear driven sea water pump (rubber impeller)
    • Fin and tube type jacket water heat exchanger
    Starting System
    • Starter motors - 12V or 24V
    General
    • Closed crankcase ventilation system
    • Integral engine oil cooler
    • Vibration damper and guard
    • Self-tensioning multi-vee alternator drive belt
    Mounting System
    • Front and rear engine mounting brackets
    OPTIONAL ATTACHEMENTS
    • Transmission gear oil cooler (engine mounted)
    General
    • Alternators - 24V 140 amp - 12V 175 amp
    • Instrument Panels
    • Glow plugs
    • Primary fuel filter/water separator (remote mount)
    • Selection of factory-fitted marine transmissions and oil hoses
    • Triple groove PTO pulley (crankshaft mounted)
    • Flexible fuel hoses
    Cooling System
    • Jacket water heater
    • Cabin heater (calorifier) connections
    Exhaust System
    • 6" water cooled exhaust elbow
    Mounting System
    • Isolation mounts
    Lube System
    • Right-hand and high level left hand oil dipsticks