CATERPILLAR 3512B DITA Marine Diesel Engine

The CATERPILLAR 3512B DITA is a heavy-duty V12 marine diesel engine engineered for high-performance propulsion in demanding commercial and industrial marine environments. Delivering approximately 1200 HP (≈ 895 kW) at 1600 RPM, this powerful engine is built to provide strong torque output, dependable load response, and long-term operational reliability.

Based on Caterpillar proven 3512B engine platform, the DITA configuration (Direct Injection Turbocharged Aftercooled) enhances combustion efficiency and power density while optimizing fuel consumption. The turbocharging and aftercooling system ensures improved air intake performance, resulting in better throttle response and consistent power delivery across a wide operating range.

Constructed with heavy-duty components and precision engineering, the 3512B DITA is designed for continuous marine duty. Its advanced cooling and lubrication systems help maintain stable operating temperatures and reduce wear under high-load conditions. The engine robust mechanical structure supports extended service intervals and long overhaul life, making it a cost-effective solution for commercial operators.

This engine is ideally suited for main propulsion in offshore support vessels, tugboats, ferries, fishing vessels, barges, and other large commercial craft. With Caterpillar worldwide parts availability and service network, operators benefit from reliable technical support and minimized downtime.

The CATERPILLAR 3512B DITA 1200 HP remains a trusted choice for marine professionals who require high horsepower, durability, and consistent performance in challenging maritime operations.

Specifications:

• Engine Type: 12-cylinder V-type, 4-stroke marine diesel engine

• Model: 3512B DITA (Direct Injection Turbocharged Aftercooled)

• Rated Power Output: 1200 HP (≈ 895 kW)

• Rated Speed: 1600 rpm

• Aspiration: Turbocharged and aftercooled

• Fuel System: Electronic high-pressure fuel injection

• Displacement: 56.7 liters

• Bore × Stroke: 159 mm × 159 mm

• Compression Ratio: Approx. 14.0 : 1

• Cooling System: Freshwater cooling with heat exchanger (seawater loop)

• Lubrication System: Full-flow forced lubrication with spin-on filters

• Governor: Electronic governor for responsive load control

• Starting System: 24 V DC electric starter

• Flywheel Housing: SAE standard

• Dry Weight: Approx. 5500–5800 kg (engine only; varies with accessories)

• Dimensions (Approx. L × W × H): ~3700 mm × 1500 mm × 2000 mm

• Emission Compliance: IMO Tier II (depending on configuration)

• Exhaust Outlet: Jacketed or dry type depending on marine setup

• Applications:

  • Main propulsion for offshore support vessels, tugs, ferries, and larger commercial craft

  • Heavy-duty continuous marine operation

  • Auxiliary power generation with appropriate configurations