The Caterpillar C12 Marine Engine is a Diesel propulsion engine, with ratings of 345-497 mhp (340-490 bhp) at 1800-2300 rpm. The C12 can meet EPA Tier 2 commercial, IMO II, and EU IW or RCD emission standards with the exception of the 497 mhp (490 bhp) rating at 2300 rpm which meets IMO I and EU RCD. The C12 combines performance, fuel economy of is environmentally friendly due to an electronically controlled fuel system. This engine is also suitable to a variety of marine applications due to the wide range of optional equipment available.
Power Rating
Continuous Ratings - Maximum Power |
340.0 bhp |
Heavy Duty Ratings - Maximum Power |
385.0 bhp |
Maximum Continuous Ratings - Maximum Power |
490.0 bhp |
Engine Specifications
Configuration |
In-line 6, 4-Stroke-Cycle Diesel |
Stroke |
5.9 in |
Displacement |
732.0 in3 |
Rotation (from flywheel end) |
Counterclockwise |
Bore |
5.1 in |
Aspiration |
TA |
Dimensions & Weights
Minimum Dry Weight |
2588.0 lb |
Maximum Length |
62.0 in |
Maximum Width |
38.1 in |
Minimum Height |
39.5 in |
Minimum Length |
62.0 in |
Minimum Width |
38.1 in |
Maximum Height |
39.5 in |
C12 Standard Equipment
- Air Inlet System
- Control System
- Cooling System
- Exhaust System
- Flywheels & Flywheel Housings
- Fuel System
- Instrumentation
- Lube System
- Mounting System
- Power Take-Offs
- Protection System
- General
Downloadable Documents
Additional Images