Vetus M4.56 Marine Diesel Engine – 52 HP of Reliable, Fuel-Efficient Marine Power by JB Marine GmbH

Compact, Quiet, and Durable Inboard Diesel for Sailboats, Cruisers, and Commercial Craft

The Vetus M4.56 Marine Diesel Engine (52 HP) represents the perfect blend of reliability, performance, and efficiency for both leisure and professional marine use.
Powered by a 4-cylinder, 1.758 L diesel engine, this model from the renowned Vetus M-Line Series delivers smooth acceleration, low noise, and long-term dependability.

Designed for sailing yachts, cabin cruisers, and light commercial vessels, the Vetus M4.56 combines proven Japanese engine technology with advanced Vetus marinization to ensure optimal performance, low emissions, and easy maintenance — making it one of the most trusted marine engines in its class.

Efficient and Powerful 4-Cylinder Performance

The Vetus M4.56 delivers 52 HP (38.3 kW) at 3000 rpm, providing strong propulsion for a wide range of vessels while maintaining exceptional fuel efficiency.

• 4-cylinder in-line configuration ensures smooth, balanced operation.

• Fuel consumption of only 244 g/kW.h, reducing running costs and environmental impact.

• High torque at low RPM for responsive handling and acceleration.

• Meets international performance standard ISO 3046-1.

Whether cruising under power or pushing against heavy seas, this engine delivers consistent, dependable output.

Advanced Cooling and Thermal Efficiency

Equipped with a standard indirect cooling system, the M4.56 maintains ideal operating temperatures and long engine life.

• Freshwater heat exchanger prevents internal corrosion.

• Optional keel cooling system for specialized installations.

• Water-cooled aluminum top cover reduces engine heat by up to 15 °C.

• Designed for easy integration with calorifier systems for hot-water generation.

This advanced thermal management ensures maximum efficiency and reliability in every condition.

Quiet, Smooth, and Comfortable Operation

Vetus engineers have reduced onboard noise levels significantly with this new-generation M-Line engine.

• Innovative air-intake filter lowers induction noise by approx. 5 dB(A).

• Soft-mounted engine supports reduce vibration transfer.

• Precision-balanced components ensure whisper-quiet cruising.

Ideal for sailors and cruisers who prioritize comfort, the M4.56 delivers the quiet confidence of modern diesel technology.

Compact, Lightweight, and Durable Design

Despite its robust construction, the Vetus M4.56 features a compact footprint for easy installation in tight engine bays.

• Dry weight: 199 kg (incl. gearbox)

• High-strength 4-cylinder block for long service life.

• Compact layout fits smaller engine compartments with ease.

• High-output 110 A alternator ensures reliable power for all onboard electronics.

Built to endure the toughest marine environments, this engine provides exceptional durability and ease of integration.

Simplified Maintenance and Easy Installation

Vetus engines are designed for ease of ownership, and the M4.56 is no exception.

• Front-mounted service points for fast access to filters and oil systems.

• Self-bleeding fuel system eliminates air locks and ensures continuous operation.

• Compatible with multiple gearbox options for flexible setups:

  • Standard: TM345(A) (2 / 2.47 : 1)

  • Optional: ZF12M (2.14 : 1), ZF15MIV (2.13 / 2.99 : 1), TMC60P (2 / 2.5 : 1)

• Supports optional saildrive configurations for sailing yachts.

Routine servicing is quick and straightforward, keeping your boat ready for every voyage.

Versatile Applications and Compliance

The Vetus M4.56 is engineered for both leisure and professional marine operations and meets the most demanding international standards.

• Certified under EU-RCD II and SOLAS regulations.

• Ideal for sailing yachts, cabin cruisers, powerboats, and workboats.

• Designed for long-term reliability in both saltwater and freshwater conditions.

Its balance of power, economy, and compliance makes it a preferred choice among European boat builders and refit professionals.

Technical Specifications – Vetus M4.56 Marine Diesel Engine

Warranty and After-Sales Support by JB Marine GmbH

When you purchase your Vetus M4.56 from JB Marine GmbH, you receive full factory warranty coverage and expert after-sales support throughout Europe.

Why Choose JB Marine GmbH

• Official Vetus Marine Diesel Engine Distributor in Europe

• Expert consultation and installation guidance

• Stock of genuine Vetus spare parts & accessories

• Fast, insured delivery across Germany and EU

• Comprehensive service, maintenance, and technical support

With JB Marine GmbH, you gain more than an engine, you gain a trusted marine engineering partner.

Frequently Asked Questions (FAQ)

 What is the price of the Vetus M4.56 Marine Diesel Engine?
Prices depend on gearbox selection, configuration, and accessories. Contact JB Marine GmbH for an exact quote and lead times.

Is the Vetus M4.56 suitable for commercial boats?
Yes — it’s used worldwide in both leisure and commercial vessels for its excellent fuel economy, torque, and reliability.

Does the engine include original Vetus parts?
All engines supplied by JB Marine GmbH include genuine Vetus components and carry the official manufacturer warranty.

 How can I purchase this engine?
Order directly via JBMarineGmbH.de or contact our marine sales team for technical advice and installation options.

Do you offer international shipping?
Yes — JB Marine GmbH ships throughout Germany, Europe, and select global destinations, with Standard and Freight delivery available.

Order Your Vetus M4.56 Marine Diesel Engine 52 HP Today

Experience proven reliability, low-noise operation, and long-term efficiency with the Vetus M4.56, now available through JB Marine GmbH, your trusted European Vetus dealer.

 Visit JBMarineGmbH.de to request a custom quote, technical datasheet, or installation consultation.
Choose JB Marine GmbH, your official source for Vetus marine diesel engines, original Vetus parts, and expert after-sales support.