New | Cat C12.9 High Performance Propulsion Engine

The C12.9 marine propulsion engine is ideal for high performance marine applications including yachts, fishing vessels, military vessels, governmental vessels and various other commercial high performance marine applications. The C12.9 is designed to be integrated with both the Cat Three60 Precision Control shaft line maneuvering and engine control solution as well as other marine industry throttle controls. The electronically-controlled C12.9 is offered in two power ratings: 850 mhp at 2300 rpm and 1000 mhp at 2300 rpm. Both ratings meet EPA Tier 3, IMO II, EU Recreational Craft Directive and EU Stage IIIA regulations. In addition to high power density, the C12.9 offers high torque at low engine speeds and fast acceleration throughout the entire engine speed range due to its air system design of integrated series turbochargers and a supercharger.

Power Range850-1000 mhp, 838-985 bhp, 625-735 bkW
Speed Range2300 rpm
EmissionsEPA Tier 3, IMO II, EU Stage IIIA
Bore5.31 in
Stroke5.9 in
Displacement787 in³
Rotation from Flywheel EndCounterclockwise
ConfigurationIn-line 6, 4-Stroke-Cycle Diesel
Dimensions & Weights
Width - Engine43.7 in
Length - Engine57.6 in
Height - Engine42.7 in

High Power Density

Industry-Leading Torque And Throttle Response At Low Speed

Smooth, Quiet Operation Throughout The Entire Operating Range

Closed Crankcase Ventilation System Improves Engine Room Cleanliness

Common Rail Fuel System Enables Optimum Combustion, Low Emissions And Reduced Noise

Available On-Engine Control Panel With “start,” “stop,” And Display For Engine Diagnostics

Inlet Air Heater For Improved Cold Weather Startability

Low Maintenance (fresh Water/Coolant) Aftercoolers

12v Or 24v Electrical System

Gplink Ready For Remote Engine And Vessel Monitoring

Optional Equipment

  • 24V 120 amp
  • 24V 160 amp
  • 12V 200 amp
Electric starting motor
  • 12V
  • 24V



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