5.31 in / 135 mm
5.9 in / 150 mm
787 in³ / 12.9 l

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 Range 850-1000 mhp, 838-985 bhp, 625-735 bkW
Speed Range 2300 rpm
Emissions EPA Tier 3, IMO II, EU Stage IIIA
Aspiration TA
Bore 5.31 in / 135 mm
Stroke 5.9 in / 150 mm
Displacement 787 in³ / 12.9 l
Rotation from Flywheel End Counterclockwise
Configuration In-line 6, 4-Stroke-Cycle Diesel
Dimensions & Weights
Width - Engine 43.7 in / 1110 mm
Length - Engine 57.6 in / 1463 mm
Height - Engine 42.7 in / 1085 mm

Optional Equipment

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