Developed under a close working relationship with luxury car manufacturer BMW, the new BY Series sets a new standard for high performance marine engines. The BY Series combines technologies from Yanmar Marine and BMW to produce four high performance marine diesel engines, significantly expanding the propulsion package choice for boat builders and their customers.

The new BY Series include:
• 4BY 150 HP
• 4BY 180 HP
• 6BY 220 HP
• 6BY 260 HP
These engines are rated at 4,000 rpm and are turbocharged and intercooled. The engines are available for both shaftdrives and sterndrives. The turbocharger on the inboard four-cylinder and all the six-cylinder models are also wastegated. The four engines are available with the latest Kanzaki marine gears or a choice of Bravo One, Two or Three sterndrives, developed specially for diesels. These engines are lighter, more compact and cleaner than the models they replace.

Electronic control is by second-generation common rail with magnetic injectors and the engines include a CAN bus system with NMEA 2000 protocol. Vital engine data from the electronic control system is shown on a Yanmar LCD display and analog gauges via the NMEA Can-Bus network. Various compatible control heads are available to meet a wide array of applications. All of the engines in the range will meet the new 2007 US EPA Tier2 and European RCD emissions regulations.

• New compact engine design results in reduced weight and overall size, increasing performance.
• Electronic control with second-generation common rail with magnetic injectors
• Engines include a CAN bus system with NMEA 2000 protocol
• Dual air intake ports provide optimized fuel/air mix resulting in high torque.
• Ribbed cast iron block provides unparalled strength and rigidity.
• Hollow camshaft creates lower overall engine weight and increases power to weight ratio
• EPA Tier 2 emissions compliant