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Cat® C7 Diesel Marine Propulsion Engines, with ratings of 255-375 mhp (250-370 bhp) at 2400-2600 rpm, meet IMO I and EU RCD emission standards. C7 engines deliver impressive performance throughout a wide speed range with exceptional power density. The compact package size and extensive choice of options ensures these engines are ideal for a wide range of marine applications such as small fishing, cruisers, or patrol vessels. Single-side servicing improves ease of maintenance and lowers overall owner operating costs.

Power Rating

Power Range 250-370 bhp (187-276 bkW) 250-370 bhp (187-276 bkW) Less
Continuous Ratings - Maximum Power 250.0 bhp 187.0 bkW Less
Heavy Duty Ratings - Maximum Power 275.0 bhp 205.0 bkW Less
Maximum Continuous Ratings - Maximum Power 315.0 bhp 235.0 bkW Less

Engine Specifications

Speed Range 2400-2600 rpm 2400-2600 rpm Less
Emissions IMO I, EU RCD IMO I, EU RCD Less
Aspiration TA TA Less
Bore 4.33 in 110.0 mm Less
Stroke 5.0 in 127.0 mm Less
Displacement 442.0 in3 7.24 L Less
Rotation (from flywheel end) Counterclockwise Counterclockwise Less
Configuration In-line 6, 4-Stroke-Cycle Diesel In-line 6, 4-Stroke-Cycle Diesel Less

Dimensions & Weights

Minimum Dry Weight 1760.0 lb 798.0 kg Less
Minimum Length 48.1 in 1221.8 mm Less
Maximum Length 48.1 in 1221.8 mm Less
Minimum Height 36.1 in 916.9 mm Less
Maximum Height 36.1 in 916.9 mm Less
Minimum Width 36.2 in 919.6 mm Less
Maximum Width 36.2 in 919.6 mm Less

Power-to-Weight Ratio

The C7 proves to be a top competitor, with an outstanding powerto-weight ratio of 2.35 kg/bkW, or 3.87 lb/bhp

Turbocharger and Fuel System Calibrations

Optimized foroutstanding response that provides phenomenal acceleration toplaning speeds.

Electronic Control System

The ADEM III electronic control system provides engine speed governing, automatic air/fuel ratio control, engine parameter monitoring, and system diagnostics, as well as cold start strategy, engine synchronization, trolling mode strategy, and slow vessel mode.

70-pin Customer Connector

The C7 has a 70-pin customer connector compatible with the optional display systems – Marine Power Display, Marine Analog Power Display, and Engine Vision. C7 is also compatible with the Multi- Station Control System when available.

Seawater Aftercooling (SWAC)

The C7 engine has seawater aftercooling (SWAC), which alsocontributes to greater power output. The heat exchangerincorporates the expansion tank and thermostat into an integrated,compact, and easy-to-service design.

Comes standard with high quality white urethane paint

High quality white urethane paint is standard, with an optionalsuperior quality custom paint finish available

C7 Standard Equipment

Air Inlet System
  • Corrosion-resistant sea water aftercooler core, air cleaner/ fumes disposal (closed system), 12 V air inlet heater

Control System
  • Electronic governor, Hydraulic Electronic Unit Injection (HEUI) fuel system, A 4 Electronic Control Module (ECM), Engine mounted 70-pin dedicated customer connector, SAE J1939 data link

Exhaust System
  • Watercooled exhaust manifold and turbocharger

Power Takeoffs
  • Hydraulic pump drive
  • SAE A
  • 11 tooth spline
  • Crankshaft pulley (alternator drive)

Flywheel and Flywheel Housing
  • SAE No.0 Flywheel(136 Teeth) SAE No.0 Flywheel Housing

Fuel System
  • Hydraulic Electronic Unit Injection (HEUI), fuel filter—RH or LH service
  • fuel priming pump
  • fuel transfer pump

Lube System
  • Crankcase Breather
  • gear driven oil pump
  • standard capacity oil pan
  • oil filter –front center service
  • oil fillerRH or LH service,
  • oil drain- RH or LH service

Protection System
  • Electronic Overspeed Shutoff

  • Vibration Damper
  • lifting eyes
  • 70-pin customer wiring connector
  • SAE J1939 data link

Cooling System
  • Belt driven centrifugal jacket water pump
  • Gear driven auxiliary sea water pump
  • engine mounted heat exchanger (heat exchanger models only)
  • expansion tank (heat exchanger models only)
  • engine oil cooler, transmission oil cooler
  • auxiliary sea water lines
  • block heater (right side only)

C7 Optional Equipment

Cooling System
  • Coolant Recovery Tank, Coolant Level Sensor, Hydraulic Oil Cooler

Exhaust System
  • Watercooled Elbow, Dry Elbow, Flexible Fitting, EXH Outlet Flange, Muffler, 6" Spark Arresting Muffler

Flywheel & Flywheel Housing

Fuel System
  • Primary Fuel/Water Separator, Fuel Cooler, Flexible Fuel Lines, Full Temperature Sensor

  • OEM Wiring Harness
  • Engine to Engine Harness
  • Instrument Panels
  • Transmission Sensors
  • Magnetic Pickup

Lube System
  • Sump Pump (Manual)
  • Sump Pump Lines

Mounting System
  • Vibration Isolators

Power Take-Offs
  • Crankshaft Pulley

Starting System
  • Electric Starting Motors - 12 & 24 volt
  • Starting Aid

  • Engine Protective Cover

Engine and Transmission
  • Coolant recovery tank
  • Coolant level sensor
  • Exhaust elbow, dry
  • Exhaust elbow, watercooled
  • Fuel cooler
  • Flexible fuel lines
  • Fuel temperature sensor
  • Spare parts kit
  • Sump Pump, manual—RH and LH service

Starting System
  • Air inlet heater, 24V
  • Electric starting motor, 12V or 24V
  • Jacket water heater, 240V

  • Belt guard removal
  • Turbo air outlet cover

Cat® Dealer Service

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Extended Warranty and Support

Caterpillar offers a variety of integrated solutions to help you protect your investment, minimize owning and operating costs, and maximize up-time.

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