C7.1

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

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.

C7.1 High Performance Propulsion Engine

DESCRIPTION

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

Meet the new C7.1 Commercial Propulsion Engine

C7.1 Marine Propulsion Engine Walkaround

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
  • Optional Equipment
  • Specs
  • Docs

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

Specs

Overview

Long Name:
C7.1 Marine Propulsion Engine (U.S. EPA Tier 3 / IMO II)
Name:
C7.1
Brand:
Caterpillar
Status:
Current

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
428 in³ / 7.01 l
Aspiration
Turbocharged-aftercooled
Governor
Electronic (A5E2 V2 ECM)
Flywheel Housing
SAE No. 03
Bore
4.13 in / 105 mm
Stroke
5.31 in / 135 mm
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
1676 lb / 760 kg
Height
34.5 in / 876 mm
Length
43.1 in / 1095 mm
Width
31.4 in / 798 mm

SEE HOW C7.1 COMPARES AGAINST FREQUENTLY COMPARED PRODUCTS.

Commercial Propulsion Engines
C7.1
C7.1 High Performance Propulsion Engine
Brand
Caterpillar
Status
Current
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
Displacement
428 in³ / 7.01 l
Aspiration
Turbocharged-aftercooled
Bore
4.13 in / 105 mm
Stroke
5.31 in / 135 mm
Selected Model
Commercial Propulsion Engines
C32B
C32B Commercial Propulsion Engine
Brand
Cat
Status
Current
Power Range
1200 - 1700 bhp (895 - 1268 bkW)
Speed Range
1600 - 2300 rpm
Emissions
IMO II, IMO II/III, U.S. EPA Tier 4
Configuration
V 12, 4-Stroke-Cycle Diesel
Displacement
1959 in³ / 32.1 l
Aspiration
Twin Turbocharged - Aftercooled
Bore
5.71 in / 145 mm
Stroke
6.38 in / 162 mm
More Details
Commercial Propulsion Engines
C9.3
C9.3 Marine Propulsion Engine Commercial Applications
Brand
Caterpillar
Status
Current
Power Range
375-476 bhp (280 - 355 bkW)
Speed Range
1800 - 2300 rpm
Emissions
IMO II, U.S. EPA Tier 3, China Stage II
Configuration
In-line 6, 4-Stroke-Cycle Diesel
Displacement
567.5 in³ / 9.3 l
Aspiration
Turbocharged - Aftercooled
Bore
4.5 in / 115 mm
Stroke
5.8 in / 149 mm
More Details