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Caterpillar

C7.1 High Performance Propulsion Engine

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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Details

Specifications

Spec Value
Power Range 298 bkW - 373 bkW (400 bhp - 500 bhp) 298 bkW - 373 bkW (400 bhp - 500 bhp)
Spec Value
Rotation from Flywheel End Counterclockwise Counterclockwise
Speed Range 2900 rpm 2900 rpm
Bore 4.13 in 105 mm
Emissions EPA Tier 3 Recreational, IMO II, RCD 2016 EPA Tier 3 Recreational, IMO II, RCD 2016
Stroke 5.31 in 135 mm
Aspiration Turbocharged, aftercooled Turbocharged, aftercooled
Displacement 427.16 in³ 7.01 l
Configuration In-line 6, 4-Stroke-Cycle Diesel In-line 6, 4-Stroke-Cycle Diesel
Spec Value
Width – Engine 31.4 in 798 mm
Height 34.5 in 876 mm
Engine Dry Weight – Approximate 1653 lb 750 kg
Length – Engine 54.9 in 1394 mm

Standard Equipment

AIR INLET SYSTEM

  • Air cleaner/fumes disposal (closed system)
  • Turbochargers, jacket water cooled
  • Aftercooler condensate drain

CONTROL SYSTEM

  • Cold mode start strategy
  • PWM secondary throttle
  • Cold mode start strategy
  • Electronic diagnostics and fault logging
  • Engine and transmission monitoring (temperature, pressure)
  • Electronic fuel/air ratio control
  • Engine Protection Mode for extended ambient conditions
  • Three types of throttle inputs (CAN, PWM, and 0-5V)
  • 70-pin customer connector

COOLING SYSTEM

  • Sea water pump, gear driven, for HEX cooled engines only
  • Sea water aftercooled
  • Jacket water pump, gear driven
  • JW Heat Exchanger – Corrosion resistant shell and tube style
  • Fuel cooler
  • Expansion tank
  • Thermostat housing
  • 63mm hose bead raw water inlet
  • 50 mm hose bead raw water oulet
  • Integrated gear oil cooler

EXHAUST SYSTEM

  • Water-cooled exhaust manifold & turbocharger
  • 90mm ID round flanged exhaust outlet

FLYWHEELS & FLYWHEEL HOUSINGS

  • Flywheel Housing, SAE No. 3 – With M10 Threads
  • Flywheel, SAE 11 1/2, with 3/8 UNF threads
  • SAE standard rotation

FUEL SYSTEM

  • High Pressure Common Rail fuel system
  • High pressure fuel system pump with integral low pressure fuel transfer pump
  • Primary fuel filter, remote mounted
  • Secondary fuel filter, LH top service location

LUBE SYSTEM

  • Crankcase breather, closed crankcase ventilation
  • Oil filter, LH top service location
  • Oil cooler
  • Oil pan, center sump
  • Oil pump, gear driven
  • Dipstick, RH service on Port, LH service on Starboard

MOUNTING SYSTEM

  • Front and rear support brackets

GENERAL

  • Front belt and damper guard
  • Lifting eyes
  • Upper front-facing customer wiring connector and Service Tool connection

PROTECTION SYSTEM

  • Electronic Engine Monitoring System provides engine de-rate strategies to protect against adverse operating conditions

PAINTS

  • Engines are painted Matterhorn white with pleasure craft finish includes epoxy primer with polyurethane topcoat. Fuel lines, water lines and clamps and wiring harness will be unpainted. Standard decals and informational films will be installed. Shipped loose parts will be shipped as received from suppliers. Heat sensitive components have a textured black finish.

Optional Equipment

CONTROL SYSTEM

  • Instrument Panels

INSTRUMENTATION

  • Transmission Sensors

MOUNTING SYSTEM

  • Vibration isolation mounting

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