YANMAR engines have become the global standard in sailboat and small craft propulsion. Bringing common rail technology to smaller applications, YANMAR exclusively provides the benefits of fuel efficiency, added power, and cleaner operation to deliver 5x Best in Class features.

1GM Series COMMON RAIL ENGINE

1GM10

Specifications

• Rated Output: 6.6 kW / 9 mhp
• Rated Speed: 3600 rpm
• Displacement: 0.318 L / 19.41 cu. in
• No. of cylinders: 1 cylinder
• Cylinder Bore x Stroke: 75 mm x 72 mm / 2.95 in x 2.83 in
• Combustion system: Indirect Injection, In-line Pump
• Aspiration: Natural
• Alternator: 12V – 40A
• Dry weight without gear: 71 kg / 156.5 lbs
• Dimensions: 554 mm x 410 mm x 485 mm
• Controls: Mechanical
• Certifications: RCD 2 EPA Tier 2 BSO II EMC

1GM10 Series Operation Manual & Specifications

YM Series COMMON RAIL ENGINE

2YM15

Specifications

• Rated Output: 10 kW / 14 mhp
• Rated Speed: 3600 rpm
• Displacement: 0.57 L / 34.7 cu. in
• No. of cylinders: 2 cylinders
• Cylinder Bore x Stroke: 70 mm x 74 mm / 2.75 in x 2.91 in
• Combustion system: Indirect Injection, In-line Pump
• Aspiration: Natural
• Alternator: 12V – 125A
• Dry weight without gear: 103 kg / 227 lbs
• Dimensions: 613 mm x 463 mm x 600 mm
• Controls: Mechanical
• Certifications: RCD 2 EPA Tier 3 EPA Tier 3C BSO II EMC

3YM20

Specifications

• Rated Output: 15.3 kW / 21 mhp
• Rated Speed: 3600 rpm
• Displacement: 0.854 L / 52.1 cu. in
• No. of cylinders: 3 cylinders
• Cylinder Bore x Stroke: 70 mm x 74 mm / 2.76 in x 2.91 in
• Combustion system: Indirect Injection, In-line Pump
• Aspiration: Natural
• Alternator: 12V – 125A
• Dry weight without gear: 110 kg / 243 lbs
• Dimensions: 694 mm x 463 mm x 600 mm
• Controls: Mechanical
• Certifications: RCD 2 EPA Tier 3 EPA Tier 3C BSO II EMC

3YM30AE

Specifications

• Rated Output: 21.3 kW / 29.1 mhp
• Rated Speed: 3200 rpm
• Displacement: 1.266 L / 77 cu. in
• No. of cylinders: 3 cylinders
• Cylinder Bore x Stroke: 80 mm x 84 mm / 3.15 in x 3.31 in
• Combustion system: Indirect Injection, In-line Pump
• Aspiration: Natural
• Alternator: 12V – 125A
• Dry weight without gear: 127 kg / 280 lbs
• Dimensions: 715 mm x 485 mm x 545 mm
• Controls: Mechanical
• Certifications: RCD 2 EPA Tier 3 EPA Tier 3C BSO II EMC

YM Series Operation Manual & Specifications

JH-CR Series COMMON RAIL ENGINE

Demonstrating YANMAR’s ‘5x best in class’ features – Clean, Interconnective, Quiet, Powerful, Fuel Efficient – the 4JH-CR series sets the global standard in sailboat and small craft propulsion.

Utilizing the long-established TNV industrial YANMAR block as the durable foundation, the 4JH-CR marine series incorporates an advanced custom-built Bosch common rail fuel injection system, this brings the advantages of common rail technology to sailboats and smaller craft, exclusively from YANMAR for this horsepower range.

With 4 power ratings across one design, the 4JH-CR engine is the perfect solution to fit across a wide variety of boats sizes and applications. And with a similar footprint to previous models and competition alike, it is the ideal choice for repowers.

Features

• Genuine YANMAR-based engine featuring a custom-designed common rail system
• Advanced fuel injection technology for sailboats and smaller motorboats and commercial vessels
• Sets the global standard in sailboat and small craft propulsion
• Wide range of power ratings in one model to fit a variety of applications
• Versatile control options with mechanical control as standard and option to upgrade to electronic controls

Models

JH-CR Series Operation Manual & Specifications

4LV Series COMMON RAIL ENGINE

The 4LV series engine raises the standard for engines in its class, with exceptionally low noise and vibration alongside the 2.8 L displacement delivering powerful low-end torque and stunning acceleration.

By exceeding the strict EPA Tier 3 and EU RCD Stage 2 emissions regulations, the engines feature a virtually odor-free and smoke-free operation. Direct connectivity to NMEA and J1939 CAN-bus networks has been purpose engineered into the 4LV range, allowing future-proofed integration to any multifunction bridge display.

Over and above the impressive performance, the resounding benefit of the 4LV Series remains its versatility, with all models available with multiple shaft and jet drive options and the durable YANMAR ZT370 sterndrive. Fulfilling needs across all boating applications, it is the perfect solution for new builds and repowering.

Features

• Specifically designed for sailing yachts over 50ft, super yacht tenders, small motor boats and light-duty commercial* vessels
• Powerful low-end torque performance, delivering superior acceleration
• Exceeds EPA Tier 3 and EU RCD Stage 2 emissions regulations
• Measures exceptionally low for smoke, odor and noise emissions
• Direct connectivity for plug-and-play integration

4LV Series Operation Manual & Specifications

8LV Series COMMON RAIL ENGINE

YANMAR’s 8LV is a compact power plant with an extremely efficient and versatile design. The V8 common rail configuration allows for a balanced and quiet running engine with twin turbos to deliver faster acceleration response.

Featuring a broad speed range from 550 rpm idle to 3800 rpm max speed, the 8LV can be applied to fit many, differing application needs from low speed, easy maneuvering to high speed, responsive cruising. And with a large 180 amp alternator as standard, you can efficiently power added features, and do so easily with direct connectivity to all NMEA devices in this electrically controlled engine.

The best power-to-weight ratio in its class and compact size makes this engine ideal, whether for new builds or repowers alike.

Features

• Twin-turbos deliver high torque for superior acceleration and responsive control
• Exceptional power range of 550 to 3,800 rpm enables easy maneuvering and high top-end speed
• Compact design with an outstanding power-to-weight ratio
• Large-capacity 180 amp alternator provides continuous high-power output
• V8 common rail design delivers a smooth, quiet, clean and fuel-efficient performance
• YANMAR ZT370 sterndrive available across the full 8LV series

4LV Series Operation Manual & Specifications

6LY-CR Series COMMON RAIL ENGINE

Built on 30 years of history, the 4th generation 6LY-CR is a smooth and robust 6 cylinder in-line engine, producing impressively clean and powerful performance.

Incorporating an advanced Denso common rail fuel injection system, the 6LY-CR delivers excellent fuel economy and significantly less noise than previous generations, while the high torque output throughout its full operating range produces class leading acceleration and responsive performance.

Its narrow and lightweight profile enables installation in the tightest of engine rooms, making it the perfect solution for repowering, as well as newly built vessels. 

Features

• Compact, lightweight, and powerful engine
• High torque on the low-end and over the power band, delivering leading acceleration and top end responsiveness
• Custom YANMAR 6LY block is purpose-built for marine applications
• 4th generation reliability for proven performance with cruising, racing and light commercial applications
• Designed for efficient installation and refitting

6LY Series Operation Manual & Specifications

6LF Series COMMON RAIL ENGINE

The 6LF engine is a compact and powerful common rail diesel engine, perfect for planing and semi-planing vessels, both recreational and light duty commercial. Controlled by the YANMAR VC20 system, it expands YANMAR brand’s line with higher horsepower, providing the largest common rail, electronically managed marine diesel line-up in the industry.

The YANMAR 6LF meets EPA Tier 3 and EU RCD Stage 2 emissions regulations while also providing a wide range of fuel compatibility to meet requirements for various government service applications.

The 6LF has been customized with YANMAR’s proprietary fuel mapping and a larger mixing elbow for reliable and consistent output performance. It is custom engineered to offer direct connectivity to NMEA and J1939 CAN-bus networks. It comes available with a number of standard and optional features, including single- and 2-pole installation, various ZF gears, and custom secondary alternator options to meet nearly any complex application.

Features

• Suitable for large superyacht tenders, planing and semi-planing motor yachts up to 55ft, and light-duty commercial vessels
• High power, low weight, and compact installation creating a high power density of 82 mhp/L for the 550 mhp model
• Controlled by YANMAR VC20 Vessel Control System
• Complements the largest common rail recreational and light-duty commercial diesel engine line-up
• Exceeds EPA Tier 3 and EU RCD Stage 2 emissions regulations

6LF Series Operation Manual & Specifications

6LT Series COMMON RAIL ENGINE

Expanding YANMAR’s renowned common rail range up to an output high of 640 mhp, the 6LT is a compact and light-weight diesel engine that is an ideal solution for planning and semi-planing hulls, and fast boats, with inboard propulsion systems, suiting a range of recreational and light-duty commercial applications.

The powerful 3-model line-up, offering similar benefits to the sister 6LF powerboat series, adds higher horsepower engines to the YANMAR brand portfolio, creating the largest common rail, electronically-managed marine diesel line-up in the industry.

The 6LT series features YANMAR’s next-generation VC20 vessel control system for enhanced onboard comfort and an easier overall boating experience.

Meeting EPA Tier 3 and EU RCD Stage 2 emissions regulations, the 6LT offers leading fuel economy and also provides a wide range of fuel compatibility to meet requirements for various government service applications.

The 6LF has been customized with YANMAR’s proprietary fuel mapping and a larger mixing elbow for reliable and consistent output performance. It is custom engineered to offer direct connectivity to NMEA and J1939 CAN-bus networks.

Available as a complete package, the engine comes available with a number of standard and optional features, including single- and 2-pole installation, various ZF gears, and custom secondary alternator options to meet nearly any complex application.

Features

• Suitable for large superyacht tenders, planning and semi-planing motor yachts up to 55ft, as well as fast boats, and light-duty commercial vessels such as workboats, RIBs, fast rescue boats, and coast guard/military craft
• High power, low weight, and compact installation creating a high power density of 74 mhp/L liter for the 640 mhp model
• Controlled by YANMAR VC20 Vessel Control System
• Complements the largest common rail recreational and light-duty commercial diesel engine line-up on the market
• Exceeds EPA Tier 3 and EU RCD Stage 2 emissions regulations

6LT Series Operation Manual & Specifications