MITSUBISHI S6A3-MPTK 405 kW

The MITSUBISHI S6A3-MPTK is a robust, high-performance marine diesel engine delivering 405 kW (approximately 543 HP) of power, designed to meet the demanding requirements of commercial and industrial marine applications. This engine combines reliability, efficiency, and durability, making it ideal for use in fishing vessels, cargo ships, and workboats where consistent performance is critical.

Featuring a 6-cylinder inline configuration, the S6A3-MPTK incorporates advanced Mitsubishi engineering technologies, including turbocharging and intercooling, ensuring optimal power output while maintaining fuel efficiency. Its sturdy construction allows for long service intervals, and the engine is designed for easy maintenance with accessible service points.

Key benefits of the MITSUBISHI S6A3-MPTK include smooth operation under heavy load, low vibration levels, and compliance with marine emissions standards. Its compact yet powerful design makes it suitable for applications requiring high power density without sacrificing reliability.

This engine is supported by Mitsubishi global service network, providing peace of mind for operators seeking performance, longevity, and cost-effective maintenance in demanding maritime environments.

Applications:

• Commercial fishing boats

• Workboats and tugs

• Medium-sized cargo vessels

• Offshore support vessels

Highlights:

• Power Output: 405 kW @ rated RPM

• Configuration: 6-cylinder inline, turbocharged

• Fuel-efficient design with long service intervals

• Robust construction for demanding marine conditions

• Global service and parts support

Technical Specifications

General Engine Data

• Engine Model: S6A3‑MPTK

• Engine Type: 4‑stroke, water‑cooled diesel engine with direct injection

• Aspiration: Turbocharged with air‑cooler

• Cylinder Configuration: 6 in‑line

• Total Displacement: 18.56 L

• Bore × Stroke: 150 × 175 mm

• Compression Ratio: 14.5 : 1

• Flywheel & Housing: SAE 14 / SAE 10

• Dry Weight: ~2,100 kg (standard configuration)

• Dimensions (L × W × H): 2,189 × 1,127 × 1,421 mm (approx.)

• Cooling System: Separate high‑ and low‑temperature circuits with charge air cooler directly cooled by seawater (intercooler)

Performance (Propulsion)

• Rated Output: 405 kW (≈ 543 HP)

• Engine Speed: 1,840 rpm

• Emission: Not regulated / Tier II (depending on market)

Operation & Use

• Designed for marine propulsion: ferries, workboats, tugboats, fishing craft, and medium-sized vessels

• Compact package includes built‑up heat exchanger, seawater pump, and panels for easier installation

• Heavy-duty reliability with balanced combustion, fuel efficiency, and accessible maintenance