New | Cat C18 ACERT High Performance Propulsion Engine (Tier 3 Recreational)

The C18 ACERT 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.

Power Range1015-1150 mhp, 1001-1136 bhp, 747-847 bkW
Speed Range2300 rpm
ConfigurationIn-line 6, 4-Stroke-Cycle Diesel
Bore5.7 in
Stroke7.2 in
Displacement1106.0 in3
Rotation (from flywheel end)Counterclockwise
EmissionsEPA Tier 3, IMO II, EU IW
Dimensions & Weights
Minimum Length73.0 in
Maximum Length76.0 in
Minimum Width44.6 in
Maximum Width47.4 in
Minimum Height47.2 in
Maximum Height51.2 in
Minimum Dry Weight4000.0 lb
Maximum Dry Weight4299.0 lb
  • Aftercooler - sea water, corrosion resistant
  • Air cleaner/fumes disposal (closed system)
  • Turbocharger, jacket water cooled
  • Front-down and rear-down aftercooler condensate drains
  • 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 +/-)
  • 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
  • Water-cooled exhaust manifold & turbocharger
  • 114.3 mm (4.5 in) ID round flanged exhaust outlet
  • Flywheel Housing, SAE No. 1
  • Flywheel, 18 inch, 113 teeth
  • SAE standard rotation
  • Fuel filter, RH service on Port, LH service on Starboard
  • Fuel transfer pump
  • Fuel priming pump
  • Hybrid fuel line design
  • 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
  • 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
  • Crankshaft pulley, 292 mm (11.5 in) two groove, 15.88 mm (0.63 in) width
  • A4 ECM Electronic Engine Monitoring System provides customer programmable engine de-rate strategies to protect against adverse operating conditions
  • Front damper guard
  • Lifting eyes
  • RH or LH service options
  • Upper rear-facing customer wiring connector and Service Tool connection



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