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Caterpillar/MaK

6M43C

Main Engine 4-Stroke · Main Engines (4-Stroke)

Technical data from manufacturer or class sources · not yet verified by a person​​‍‌‌​⁠​‍‌‍‌​‍‍​‍‍‌⁠
6Cylinders
430 mmBore
610 mmStroke
500 rpmMCR RPM

Designed with a focus on reliability and ease of maintenance, the Caterpillar MaK 6M43C long-stroke diesel engine series has become a market leader in marine applications. Since its introduction, more than 650 engines have been sold, delivering over 6,500 MW of total power. This success is attributed to the engine's low fuel and lubricating oil consumption, extended life between major overhauls, and robust modular design. The 6M43C is available in 6, 7, 8, and 9 cylinder configurations, making it highly versatile for a range of vessel types, including container feeders, RoPax vessels, RoRo ferries, and cruise liners. The engine's compact construction with minimal pipework and easy access to components simplifies maintenance and installation. Safety is also a key feature, with the 6M43C adhering to SOLAS regulations and featuring an explosion protection cover, cladding for the fuel system, and stainless steel exhaust gas casings. The series has been further refined to enhance operational reliability, reduce maintenance, and improve overall economy, making the Caterpillar MaK 6M43C a reliable choice for marine propulsion.

Specifications

Technical data.from datasheet

Every value below comes from the manufacturer datasheet or class-society record on file for this model.

SFOC (Specific Fuel Oil Consumption)175–178 g/kWh (HFO optimized)
Lube Oil Consumption0.6 g/kWh standard; 0.3 g/kWh optional
Engine Type4-stroke turbocharged intercooled non-reversible with direct injection
Cylinder Block MaterialNodular cast iron (Kugelgraphitguss)
Turbocharger Maintenance Interval15,000 operating hours (inspection/cleaning)
Per-Cylinder Power Output~700–760 kW/cylinder
Engine Centre Distance3400 mm
Charge Air CoolerCast casing with 40% increased base area for turbocharger mounting
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Download datasheet (PDF) (7636 KB)
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