YANMAR 3JH5E 39HP Diesel Marine Inboard Engine – Compact, Efficient, and Reliable | JB Marine GmbH

JB Marine GmbH, Germany’s trusted Yanmar distributor, proudly presents the YANMAR 3JH5E 39HP Marine Inboard Engine, a compact, naturally aspirated marine diesel engine engineered for efficiency, reliability, and quiet operation.

Ideal for sailing yachts, catamarans, small motorboats, and light commercial craft, this 3-cylinder engine provides smooth propulsion, low emissions, and exceptional fuel economy, making it one of the most dependable Yanmar marine engines in its class.

Overview – Precision Engineering for Marine Performance

The Yanmar 3JH5E 39HP represents the next generation of small marine diesels, designed to meet the needs of both recreational and professional operators.

With its 1.642L displacement and 39 horsepower output at 3,000 RPM, this engine delivers quiet, fuel-efficient performance while maintaining durability and low maintenance requirements.

Fully compliant with IMO Tier II and EPA Tier II standards, the 3JH5E combines environmental responsibility with Yanmar’s legendary engineering quality.

Why Choose the Yanmar 3JH5E 39HP Marine Diesel Engine

Naturally Aspirated Power

Reliable, smooth power delivery at 39HP and 3,000 RPM — ideal for yachts and light-duty marine craft.

Fuel-Efficient Design

An advanced diesel combustion system ensures optimal fuel efficiency, reducing operating costs on long voyages.

 Environmentally Compliant

Meets IMO Tier II and EPA Tier II emission standards, offering clean, eco-friendly operation.

Compact and Lightweight

Weighing only 192 kg, the Yanmar 3JH5E’s small footprint (775 × 525 × 670 mm) allows easy installation in tight engine compartments.

 Quiet and Comfortable Operation

Low vibration and minimal noise levels ensure a smoother, quieter ride for passengers and crew.

Built for Durability

Constructed from corrosion-resistant marine-grade materials for extended service life in saltwater environments.

Simple Maintenance

Accessible design makes servicing quick and straightforward, minimizing downtime and maintenance costs.

Technical Specifications – Yanmar 3JH5E Diesel Marine Engine

Package Includes

When you order the YANMAR 3JH5E 39HP Diesel Marine Engine from JB Marine GmbH, your package includes:

• Brand-new Yanmar 3JH5E engine

• Factory-installed gearbox (KM35P / KM35A)

• Freshwater heat exchanger cooling system

• Starter motor and 12V–125A alternator

• Flexible engine mounts

• Fuel pre-filter with water separator

• Exhaust mixing elbow (L-Type)

• 5m wiring harness

• Freshwater expansion tank

• Belt safety cover

• Installation and operation manuals

Each unit is factory-tested and certified, ensuring maximum performance and durability right out of the box.

Optional Accessories

Enhance your vessel’s setup with genuine Yanmar accessories, available through JB Marine GmbH:

• High-Riser Exhaust Mixing Elbow

• Secondary Alternator (12V – 125A or 24V – 60A)

• VC10 Vessel Control System

• NMEA2000 Engine Monitoring System

• Extended Wiring Harness (3m / 5m / 10m)

• Onboard Spare Parts Kit

• Hot Water Kit for onboard systems

• Propeller Cone Nut Kit (SD60)

All accessories are OEM-approved, ensuring seamless integration and optimal performance.

Applications – Versatile Power for Small to Mid-Sized Vessels

The YANMAR 3JH5E is the ideal propulsion solution for:

• Monohull sailing yachts

• Small catamarans

• Motorboats and sloops

• Light-duty fishing vessels

Its compact design, low vibration, and fuel-saving technology make it perfect for both new builds and repowering projects.

Warranty & After-Sales Support

All Yanmar engines sold by JB Marine GmbH come with a comprehensive 5-year manufacturer’s warranty, covering defects in materials and workmanship.

Additional support includes:

• Extended service packages

• Certified Yanmar maintenance and inspections

• Global parts availability through Yanmar’s international service network

Our dedicated team ensures your engine performs reliably for years to come, backed by genuine parts, expert care, and fast response.

Frequently Asked Questions (FAQs)

What makes the Yanmar 3JH5E unique?
Its combination of compact size, fuel efficiency, and low emissions makes it one of Yanmar’s best-performing naturally aspirated engines.

Does the engine include a gearbox?
Yes — each 3JH5E comes with a factory-installed KM35A or KM35P gearbox.

Is the engine fuel-efficient?
Absolutely. Yanmar’s advanced diesel technology ensures low fuel consumption and reduced operational costs.

Which vessels are it suitable for?
It’s perfect for sailing yachts, catamarans, and light-duty commercial or fishing boats.

What warranty does it include?
Every 3JH5E engine includes a 5-year manufacturer warranty, extendable with JB Marine GmbH service plans.

Does JB Marine GmbH offer installation?
Yes — our team provides professional installation support and technical consultation for all Yanmar engines.

Can I order spare parts and accessories?
Yes — we supply genuine Yanmar OEM parts and upgrade kits with fast global delivery.

Why Choose JB Marine GmbH – Your Yanmar Partner in Germany

As an authorized Yanmar dealer, JB Marine GmbH provides complete marine engine solutions, from consultation to delivery and service.

Our advantages:

• Certified Yanmar marine dealer

• Factory-direct warranties

• Expert technical consultation

• Global shipping and logistics

• OEM parts and accessories

• Professional installation and maintenance

With JB Marine GmbH, you get more than an engine, you get a partner in performance.

Order Your YANMAR 3JH5E 39HP Engine Today

Power your vessel with the trusted performance of Yanmar marine engineering. The YANMAR 3JH5E 39HP Diesel Inboard Engine offers quiet operation, reliability, and class-leading fuel efficiency for your next adventure.

Contact JB Marine GmbH today for pricing, lead time, and configuration support.
Your journey begins with Yanmar power — delivered by JB Marine GmbH.