YANMAR 6LPA-STC Marine Diesel Engine (232 kW)

The YANMAR 6LPA-STC is a robust, high-efficiency marine diesel engine engineered to deliver reliable power and performance for a wide range of commercial and recreational marine applications. With a rated output of 232 kW (≈ 311 HP), this 6-cylinder, four-cycle engine combines Yanmar advanced diesel technology with durable construction to ensure consistent performance, fuel economy, and longevity even under demanding operating conditions.

Built with a turbocharged, charge-cooled (aftercooled) configuration, the 6LPA-STC optimizes combustion efficiency for superior power delivery, smoother throttle response, and reduced emissions. Its precision-engineered fuel injection system and efficient cooling and lubrication circuits help minimize fuel consumption and wear, while maintaining steady operating temperatures for reliable, long-term service.

Designed for versatility, the YANMAR 6LPA-STC is ideal for main propulsion on medium-sized vessels such as coastal passenger boats, fishing vessels, workboats, and ferries, and can also be adapted for auxiliary power applications when required. Its compact form factor and well-organized accessory layout simplify integration into engine rooms, allowing for straightforward installation and maintenance.

Yanmar global support and parts network further enhances the 6LPA-STC appeal, offering marine operators peace of mind with dependable service options and readily available replacement components. Whether navigating coastal waters or supporting commercial operations, the YANMAR 6LPA-STC delivers a balanced combination of performance, efficiency, and durability that vessel owners and operators can trust.

Specifications:

• Engine Type: 6-cylinder, in-line, 4-cycle marine diesel engine

• Model: 6LPA-STC

• Rated Power Output: 232 kW (≈ 311 HP)

• Rated Speed: Typically 2000 rpm (marine rating)

• Aspiration: Turbocharged and charge-air cooled (aftercooled)

• Fuel System: High-pressure direct fuel injection

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

• Lubrication System: Forced lubrication with full-flow oil filter

• Compression Ratio: Approx. 17.0 : 1

• Bore × Stroke: Approx. 115 mm × 125 mm

• Total Displacement: Approx. 8.21 liters

• Starting System: Electric starter (24 V DC)

• Flywheel Housing: SAE standard

• Dry Weight: Approx. 1100 kg (engine only, without gearbox)

• Dimensions (Approx. L × W × H): ~1500 × 900 × 1150 mm

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

• Applications:

  • Main propulsion for coastal workboats and ferries

  • Fishing vessels and commercial craft

  • Auxiliary power generation (with genset adaptation)

  • Small to mid-sized passenger boats