Yanmar 4JH3-DTE 125HP Diesel Marine Engine – Power, Efficiency & Durability by JB Marine GmbH
JB Marine GmbH, Germany’s authorized distributor of Yanmar marine diesel engines, proudly presents the Yanmar 4JH3-DTE 125HP Diesel Marine Inboard Engine — a compact yet powerful propulsion system engineered for exceptional performance, reliability, and long-term durability.
Delivering 125HP at 3,600 RPM, the 4JH3-DTE is built to meet the needs of professional mariners, commercial operators, and yacht owners who demand dependable performance and optimal fuel efficiency on every voyage.
Overview – Precision Performance for Demanding Marine Environments
The Yanmar 4JH3-DTE is a 4-cylinder, turbocharged diesel marine engine renowned for its balance of power, efficiency, and durability.
Designed for both recreational and light commercial use, it combines direct fuel injection, freshwater cooling with a heat exchanger, and corrosion-resistant construction to deliver reliable propulsion in a wide range of marine conditions.
Its compact footprint and lightweight build make it a perfect fit for both new installations and repowering older vessels, without compromising on performance.
Why Choose the Yanmar 4JH3-DTE 125HP Marine Diesel Engine?
Turbocharged Power & Precision
Delivers 125 horsepower at 3,600 RPM, providing exceptional acceleration, steady cruising performance, and quiet operation.
Advanced Fuel Efficiency
Yanmar’s precision diesel technology ensures optimized combustion, minimizing fuel consumption and emissions while extending range.
IMO & EPA Emissions Compliance
Fully compliant with IMO Tier II and EPA Tier II standards, the 4JH3-DTE combines power with environmentally responsible operation.
Compact, Lightweight Design
Engineered for space efficiency, 880 × 535 × 750 mm, allowing for easy installation in yachts, leisure crafts, and small commercial boats.
Freshwater Cooling System
Equipped with a heat exchanger-based cooling system to maintain optimal operating temperatures and prevent corrosion, even in warm or brackish waters.
Built for Longevity
Manufactured with marine-grade materials and corrosion-resistant components to withstand long hours of operation in harsh conditions.
Technical Specifications – Yanmar 4JH3-DTE 125HP
| Specification | Details |
|---|---|
| Model Name | Yanmar 4JH3-DTE |
| Engine Type | 4-Cylinder, 4-Stroke, Turbocharged |
| Displacement | 1.995 Liters |
| Rated Output | 125HP (93 kW) @ 3,600 RPM |
| Fuel Type | Diesel |
| Cooling System | Freshwater with Heat Exchanger |
| Weight | Approx. 220 kg |
| Dimensions (L × W × H) | 880 × 535 × 750 mm |
| Certifications | IMO Tier II, EPA Tier II |
| Gearbox | Factory-Installed (Standard) |
| Warranty | 5 Years (Manufacturer Warranty) |
Complete Engine Package – Delivered by JB Marine GmbH
Each Yanmar 4JH3-DTE 125HP Diesel Marine Engine supplied by JB Marine GmbH includes everything needed for installation and operation:
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Factory-Installed Gearbox
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Turbocharger System
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Freshwater Heat Exchanger Cooling System
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Starter Motor and Alternator (12V – 80A)
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Flexible Engine Mounts
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Fuel Pre-Filter with Water Separator
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Exhaust Mixing Elbow (L-Type)
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Wiring Harness (5m) with Connectors
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Freshwater Expansion Tank
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Belt Safety Cover
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Detailed Installation and Operation Manuals
All components are genuine Yanmar parts, ensuring full performance and long-term reliability.
Optional Accessories
Customize your Yanmar 4JH3-DTE setup with genuine accessories available from JB Marine GmbH:
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Secondary Alternator (12V or 24V)
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VC10 Vessel Control System
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High-Riser Exhaust Mixing Elbow
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NMEA2000 Engine Monitoring System
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Extended Wiring Harness (3m, 5m, or 10m)
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Hot Water Kit for Onboard Systems
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Propeller and Shaft Kits
These OEM-certified accessories ensure seamless integration and optimized performance for your vessel’s configuration.
Warranty & After-Sales Support
Your Yanmar 4JH3-DTE engine comes with a 5-Year Manufacturer Warranty, covering defects in materials and workmanship.
As an authorized Yanmar marine partner, JB Marine GmbH provides:
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Factory-backed warranty coverage
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Certified installation and maintenance services
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Genuine Yanmar spare parts and consumables
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Expert technical advice and troubleshooting
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Fast, reliable delivery across Europe and beyond
Applications – Built for Every Voyage
The Yanmar 4JH3-DTE is engineered for a variety of vessels and marine environments:
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Leisure Crafts and Yachts: Smooth, quiet, and efficient cruising.
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Light-Duty Commercial Boats: Reliable performance for daily operation.
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Fishing Vessels: Steady torque and power for towing and hauling.
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Small Motorboats and Sloops: Compact and efficient for all-round marine use.
Its blend of torque, efficiency, and size flexibility makes it one of the most trusted engines in its power class.
Frequently Asked Questions (FAQs)
What makes the Yanmar 4JH3-DTE unique?
Its turbocharged design, compact size, and Yanmar’s advanced diesel technology deliver high performance with exceptional fuel efficiency.
Does the engine include a gearbox?
Yes — the engine comes factory-fitted with a marine gearbox for easy installation and immediate operation.
What type of vessels is it suitable for?
Perfect for yachts, leisure crafts, fishing vessels, and light-duty commercial boats.
How fuel-efficient is it?
The 4JH3-DTE minimizes fuel burn per horsepower, providing excellent range and economy for long voyages.
Does it meet emissions standards?
Yes, it meets IMO Tier II and EPA Tier II requirements for low emissions.
Does JB Marine GmbH provide installation?
Yes — our certified technicians provide full installation, commissioning, and service support.
What warranty coverage is included?
A full 5-year manufacturer warranty covering defects in materials and workmanship.
Can I order accessories and spare parts?
Yes — all Yanmar genuine accessories and parts are available directly from JB Marine GmbH.
Do you offer international shipping?
Yes, we offer fast and secure worldwide shipping through JB Marine’s logistics partners.
Why Choose JB Marine GmbH – Yanmar Experts in Germany
At JB Marine GmbH, we deliver more than just engines — we provide complete marine power solutions backed by technical expertise and dependable support.
Why professionals choose us:
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Authorized Yanmar dealer and service center
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Certified marine technicians
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Competitive pricing and professional consultation
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Fast delivery across Europe and internationally
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Dedicated after-sales and warranty support
We ensure every engine we supply performs to Yanmar’s highest engineering standards.
Contact JB Marine GmbH – Order Your Yanmar 4JH3-DTE 125HP Diesel Marine Engine
Experience the perfect balance of power, efficiency, and reliability with the Yanmar 4JH3-DTE 125HP Diesel Marine Engine.
