Propulsion engines

C18

The C18 marine propulsion engine has ratings for recreational applications that meet U.S. EPA Tier 3, IMO II, and EU Stage IIIA Regulations. This marine engine incorporates the latest core engine system innovations to provide maximum benefits in power density, performance, emissions, and fuel efficiency. Not only is it equipped with engine monitoring and protection features, it is also compatible with Cat display and vessel control systems. With this engine comes the unmatched worldwide marine support network including Cat dealers and hundreds of authorized marine dealers. Their combined experience and expertise, products and services, backup and support allow your recreational pleasure craft to remain precisely that — a pleasure.

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Ratings
Power Range803 - 1136 bhp, 599 - 847 bkW
Engine
Speed Range2300 rpm
EmissionsEPA Tier 3, IMO II
AspirationTA,TTA
Bore5.7 in
Stroke7.2 in
Displacement1106.0 in³
Rotation from Flywheel EndCounterclockwise
ConfigurationIn-line 6, 4-Stroke-Cycle Diesel
Dimensions & Weights
Maximum Height51.2 in
Maximum Dry Weight4299.0 lb
Maximum Width47.4 in
Maximum Length76.0 in
Minimum Length73.0 in
Minimum Dry Weight4000.0 lb
Minimum Width44.6 in
Minimum Height47.2 in

AIR INLET SYSTEM

  • Aftercooler - sea water, corrosion resistant
  • Air cleaner/fumes disposal (closed system)
  • Turbocharger, jacket water cooled
  • Front-down and rear-down aftercooler condensate drains

CONTROL SYSTEM

  • Electronic diagnostics and fault logging
  • Cold mode start strategy
  • Engine and transmission monitoring (speed, temperature, pressure)
  • Electronic fuel/air ratio control
  • 70-pin customer connector
  • Engine Protection Mode for High Ambient Conditions
  • Three types of throttle inputs (primary/ secondary PWM, 0-5V, 4-20mA +/-)

COOLING SYSTEM

  • Sea water pump, rubber impeller, self-priming, gear driven
  • Sea water aftercooled
  • Jacket water pump, gear driven
  • JW Heat Exchanger - Titanium plate with integral fuel cooler expansion tank, and thermostat housing (fully open temp 92C)
  • Coolant recovery system

EXHAUST SYSTEM

  • Water-cooled exhaust manifold & turbocharger
  • 114.3 mm (4.5 in) ID round flanged exhaust outlet

FLYWHEELS & FLYWHEEL HOUSINGS

  • Flywheel Housing, SAE No. 1
  • Flywheel, 18 inch, 113 teeth
  • SAE standard rotation

FUEL SYSTEM

  • Fuel filter, RH service on Port, LH service on Starboard
  • Fuel transfer pump
  • Fuel priming pump
  • Hybrid fuel line design

LUBE SYSTEM

  • Crankcase breather
  • Oil cooler
  • Oil filter, spin-on, low profile, RH service on Port, LH service on
  • Oil pan, center sump
  • Dipstick, RH service on Port, LH service on Starboard
  • Oil pump, gear driven

POWER TAKE-OFFS

  • Hydraulic pump drive, SAE A, 11-tooth spline, 46 ft-lbs max torque, counterclockwise as viewed from the front of the engine with 1.41 x engine speed

PROTECTION SYSTEM

  • A4 ECM Electronic Engine Monitoring System provides customer programmable engine de-rate strategies to protect against adverse operating conditions

GENERAL

  • Front damper guard
  • Lifting eyes
  • RH or LH service options
  • Upper rear-facing customer wiring connector and Service Tool connection
  • C18 Marine High Performance Spec Sheet (599 bkW - 847 bkW)
    application/pdf
    Download ↓

Need installed dimensions with enclosure and tank? See Model Configurations