Main content

Caterpillar

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

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

Media

Photos

C7.1 High Performance Propulsion Engine
C7.1 High Performance Propulsion Engine

Videos

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

Documents

Features

Key Features & Benefits

Details

Specifications

Spec Value
Power Range 280 bhp - 425 bhp (209 bkW - 317 bkW) 280 bhp - 425 bhp (209 bkW - 317 bkW)
Spec Value
Speed Range 2300 - 2700 rpm 2300 - 2700 rpm
Emissions U.S. EPA Tier 3, IMO II, RCD II, China II U.S. EPA Tier 3, IMO II, RCD II, China II
Configuration In-line 6, 4-stroke-cycle diesel In-line 6, 4-stroke-cycle diesel
Displacement 428 in³ 7.01 l
Aspiration Turbocharged-aftercooled Turbocharged-aftercooled
Governor Electronic (A5E2 V2 ECM) Electronic (A5E2 V2 ECM)
Flywheel Housing SAE No. 03 SAE No. 03
Bore 4.13 in 105 mm
Stroke 5.31 in 135 mm
Refill Capacity 20 L (5.3 gal) 20 L (5.3 gal)
Oil Change Interval 500 hrs 500 hrs
Rotation Counterclockwise from the flywheel end Counterclockwise from the flywheel end
Cooling Heat exchange or keel cooled Heat exchange or keel cooled
Spec Value
Dry Weight 1676 lb 760 kg
Height 34.5 in 876 mm
Length 43.1 in 1095 mm
Width 31.4 in 798 mm

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

Sign up for Riggs Cat Emails

  • This field is for validation purposes and should be left unchanged.