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C7.1 Commercial Propulsion Engines

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

C7.1

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For unique applications requiring a custom approach - Caterpillar marine propulsion engines provide the power you work with and live by. So everything about them is built to help you do your job, whether that means bringing in a catch or cargo, or simply providing a pleasurable day on the water.

Power Range
280 bhp - 425 bhp (209 bkW - 317 bkW)
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
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  • Specifications
  • Features
  • Standard Equipment

Specifications

Power Rating specifications
Power Range 280 bhp - 425 bhp (209 bkW - 317 bkW)

Features

Key Features & Benefits

  • Common rail fuel system enables optimum combustion and low emissions
  • Reduced combustion noise through advanced electronic control
  • 12V or 24V electrical system
  • Compatible with Cat® displays and electronics
  • Closed crankcase ventilation system improves engine room cleanliness
  • Gear-driven jacket water pump and sea water pump for superior reliability
  • Maintenance free valve train with hydraulic valve lash adjusters
  • Self-priming fuel system ensures a smooth start every time

Standard Equipment

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

Optional Equipment

Fuel System

  • SOLAS double wall high-pressure fuel lines

General

  • Engine-mounted secondary alternator - 24V 55 amp or 12V 100 amp
  • Analogue gauge displays
  • Glow plugs
  • Mechanical throttle converter for repower

Cooling System

  • Transmission gear oil cooler (engine mounted)
  • Jacket water heater
  • Cabin heater (calorifier) connections

Exhaust System

  • Various 5" and 6" water cooled exhaust elbow configurations

Lube System

  • Right-hand and high-level left-hand oil dipsticks