The Yanmar 6LYA-STP diesel engine has earned its place as a trusted powerhouse in the marine industry, particularly as the engine of choice for the Beneteau Swift Trawler 42. Known for its balance of performance, efficiency, and reliability, this engine is a favorite among boaters who prioritize dependable power and smooth cruising. In this article, we’ll explore the features of the Yanmar 6LYA-STP, discuss its advantages for the ST42, and highlight why this combination is ideal for both coastal and offshore adventures.
Yanmar 6LYA-STP: A Modern Diesel Engine
The Yanmar 6LYA-STP is part of Yanmar’s 6LY series, a line of marine diesel engines renowned for their durability and cutting-edge technology. Designed with a focus on fuel efficiency and reduced emissions, this six-cylinder marine diesel engine is a solid choice for efficiency-conscious boaters without compromising on performance.
Key Features of the Yanmar 6LYA-STP
- Compact Design: The Yanmar 6LYA-STP is engineered to fit into tight engine compartments, making it suitable for mid-sized trawlers like the Beneteau Swift Trawler 42. Its compact dimensions free up valuable space for storage and maintenance access.
- Direct Drive Efficiency: The engine’s direct drive system ensures efficient power transfer, contributing to its reliable performance.
- Common Rail Fuel Injection: This advanced technology ensures precise fuel delivery, resulting in optimal performance and reduced fuel consumption. It also contributes to cleaner exhaust emissions, meeting stringent environmental standards.
- Turbocharged Power: The turbocharger enhances engine efficiency by increasing air intake, delivering impressive power output without excessive weight or size.
- Low Vibration and Noise: Yanmar’s focus on user comfort is evident in the engine’s smooth operation, ensuring a quieter and more pleasant onboard experience.
The Perfect Match for the Beneteau Swift Trawler 42
The Beneteau Swift Trawler 42 is celebrated for its combination of style, practicality, and performance. Powered by twin Yanmar 6LYASTP engines, each delivering 370 horsepower, this vessel achieves an ideal balance of power and efficiency, making it well-suited for long-range cruising and leisurely coastal exploration.
Performance Highlights
- Cruising and Top Speed: The Swift Trawler 42 can reach a top speed of over 25 knots. For those who prefer economical cruising, the vessel boasts a range of over 300 miles and a cruising speed of 18 knots.
- Range and Fuel Efficiency: The Yanmar 6LYASTP’s fuel efficiency enables extended cruising without frequent refueling stops. This is particularly advantageous for trawler owners who enjoy exploring remote locations.
- Ease of Maneuverability: With two control stations and a responsive power train, docking this boat is easy, but layer on both bow and stern thrusters and you’ll find tight maneuvers becoming effortless. This level of control enhances the overall boating experience, especially in busy marinas.
Comparison With Other Options
The ST 42 was also offered with Cummins QSB 5.9 (380 HP) Volvo D6 (310 HP) and Volvo D4 (300 HP). Each of these, like any engine choice, will have its advantages and disadvantages.
Maintenance and Support
Yanmar’s reputation for reliability extends to its global support network, ensuring that parts and service are readily available. Routine maintenance tasks are straightforward, thanks to the engine’s thoughtful design and accessible components.
Early models of the 6LYASTP had issues with exhaust valves seizing and or snapping off. The issue was corrected circa 2005 when Yanmar started using high-quality Inconel valves.
Serial numbers M56928 and up have the improved valves. Serial numbers M56927 and down would have the older style valves.
Popular Applications Beyond the Beneteau Swift Trawler 42
While the Yanmar 6LYASTP is synonymous with the Swift Trawler 42, it is also a popular choice for other mid-sized trawlers and yachts. The engine is a popular choice for repowering boats because of its flat-top, narrow profile. Its versatility makes it an excellent option for a variety of marine vessels.
Conclusion: A Proven Power Solution
The Yanmar 6LYASTP diesel engine is a standout choice for the Beneteau Swift Trawler 42, delivering the perfect combination of power, efficiency, and reliability. Whether you’re a seasoned mariner or a first-time trawler owner, this engine offers the peace of mind and performance needed for memorable adventures on the water. Its advanced design and exceptional support network ensure that your investment in the Yanmar 6LYASTP will continue to pay dividends for years to come.
Explore our current listings for Beneteau Swift Trawler 42 models and experience the Yanmar 6LYASTP difference firsthand. Your next great journey awaits!