/  Power Systems  /  Marine Power Systems  /  Commercial Propulsion Engines

C7.1

C7.1 Tier 3 / IMO II Propulsion Engine

Overview

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

Specifications

Units: 
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
See more

Benefits & 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

See more
  June 16, 2025

Specifications

Units: 
Power Rating
Power Range 280 bhp - 425 bhp (209 bkW - 317 bkW)
Engine Specifications
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 —
Aspiration Turbocharged-aftercooled
Governor Electronic (A5E2 V2 ECM)
Flywheel Housing SAE No. 03
Bore —
Stroke —
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
Dry Weight —
Height —
Length —
Width —

Benefits & 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

View 360