Welcome
Yanmar is the first name in 9-900 hp recreational marine diesel power. Mack Boring & Parts Company has been a leading North American supplier of Yanmar marine diesel engines for over 32 years. Find out what it means to experience the power of the market’s preferred diesel, supported by one of the most established and reliable diesel supply partners - anywhere.
Browse our full lineup of Yanmar Marine Diesels
EXPERIENCE
THE POWER OF
YANMAR "SY"
ENGINES!
VISIT OUR 45'
CONVERTIBLE
Appearing at major
tournaments this summer.
More...
Product Spotlight: New Yanmar BY Series Engines
The latest "powerful gem" from Yanmar, the BY series engine is perfect for your repower or new boat construction. A compact design featuring common rail injection and the best fuel economy in its class, the BY is the clear choice for your next marine propulsion project. The BY is 35% lighter than its competitors, available in both inboard and sterndrive packages and is backed by the best dealer support network in the industry.
See Technical Specifications:
4BY (4-Cylinder)
6BY (6-Cylinder)
Just some of the reasons to choose the BY:
- Powerful and Efficient
- Low Vibration and Low Noise
- Easy and Low Maintenance
- Light and Durable
- Clean and Safe Engine Room
- Compact Engine Dimensions
- NMEA 2000 CAN-bus Technology
- Lower Fuel Consumption
- Meets Emission Regulations
- Worldwide Support Network