Propulsion engines

C7.1

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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Ratings
Power Range400 - 500 bhp (298 - 373 bkW)
Engine Specifications
Speed Range2900 rpm
Rotation from Flywheel EndCounterclockwise
Bore4.13 in
Stroke5.31 in
AspirationTurbocharged - Aftercooled
Displacement428 in³
ConfigurationIn-line 6, 4-Stroke-Cycle Diesel
EmissionsIMO II, U.S. EPA Tier 3, RCD II, China II
Dimensions & Weights
Width - Engine31.4 in
Height34.5 in
Engine Dry Weight - Approximate1676 lb
Length - Engine43.1 in

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
  • C7.1 Marine High Performance Engine Spec Sheet (298 - 373 bkW)
    application/pdf
    Download ↓

Need installed dimensions with enclosure and tank? See Model Configurations