Vetus M3.29K Marine Diesel Engine – Keel Cooled Model (27 HP) | JB Marine GmbH

The Vetus M3.29K Marine Diesel Engine – Keel Cooled Model (27 HP) is a compact, fuel-efficient, and highly reliable inboard diesel engine, engineered for sailboats, cabin cruisers, canal boats, and small commercial vessels. Designed for smooth operation and minimal maintenance, the M3.29K represents the perfect balance of performance, durability, and comfort on the water.

At JB Marine GmbH, we supply genuine Vetus marine diesel engines across Germany and Europe, backed by full factory warranty, professional installation support, and after-sales servicing. Whether you need a keel-cooled engine for inland waterways or a quiet, efficient propulsion system for offshore cruising, the M3.29K is your dependable marine power solution.

Compact, Efficient, and Reliable Marine Power

Powered by a three-cylinder, 952 cm³ diesel engine, the Vetus M3.29K delivers 27 HP at 3600 RPM with excellent low-end torque for steady cruising and quick acceleration. Built for reliability and ease of maintenance, this engine is ideal for both new builds and repowering projects.

Key Highlights:

• 27 HP @ 3600 RPM – Reliable power for small and mid-sized vessels

• Strong low-RPM torque – Ideal for maneuvering and consistent propulsion

• Fuel-efficient design – Optimized combustion reduces consumption and emissions

• EU-RCD II and BSO compliant – Meets modern environmental and safety standards

• Compact footprint – Perfect for tight engine compartments and retrofits

With its proven design and robust build quality, the Vetus M3.29K is a trusted choice for professional mariners, private yacht owners, and boat builders alike.

Keel Cooling System – Built for Durability and Low Maintenance

The keel-cooled variant of the Vetus M3.29K is specially engineered for inland and coastal marine environments. Instead of circulating seawater through the cooling system, the M3.29K uses indirect keel cooling, transferring heat via a closed circuit. This eliminates corrosion risks, prevents scaling, and minimizes maintenance needs.

Advantages of Keel Cooling:

•  No seawater exposure — corrosion and blockage-free operation

•  Ideal for canals, rivers, and sediment-heavy waters

•  Lower maintenance costs and extended service life

•  Consistent cooling performance in all conditions

This makes the Vetus M3.29K Keel-Cooled Engine a top choice for houseboats, barges, inland cruisers, and coastal workboats requiring dependable, low-upkeep propulsion.

Low Noise, Low Vibration – Enhanced Comfort at Sea

Engine comfort is a major focus in Vetus’ engineering. The M3.29K integrates a range of vibration- and noise-reduction technologies that make it exceptionally quiet and smooth-running.

Noise & Comfort Features:

• Water-cooled aluminum top cover lowers surface heat by up to 15°C

• Advanced air intake system reduces induction sound by 5 dB(A)

• Counterbalanced cylinders deliver smooth, stable operation with minimal vibration

The result is superior onboard comfort,  perfect for long-distance cruising or commercial use where reduced noise levels are essential.

Designed for Easy Maintenance and Longevity

Every Vetus M3.29K is designed for maximum service accessibility. With all critical components front-mounted, you can easily access the oil filter, fuel filter, dipstick, and impeller for quick maintenance without complex disassembly.

Maintenance Advantages:

• Front-mounted service points for convenience

• Simplified hose layout to minimize leak risks

• Heavy-duty, corrosion-resistant materials for long-term reliability

• Self-bleeding fuel system for quick, air-free restarts

With its robust construction and long service life, the M3.29K ensures you spend less time in the engine bay and more time enjoying your vessel.

Marine-Grade Electrical Output

The M3.29K Marine Diesel Engine is equipped with a 12V, 75A alternator, providing reliable power for navigation systems, lighting, and onboard electronics.

For vessels with larger electrical systems, an optional secondary alternator can be added, a must-have feature for cruising yachts or boats equipped with fridges, inverters, and navigation electronics.

Integrated safety systems include:

• Oil pressure alarms

• Coolant and exhaust temperature warnings

• Charging current indicators

• Pre-heating control light

These built-in systems ensure the M3.29K runs safely and efficiently at all times.

Technical Specifications – Vetus M3.29K Marine Diesel Engine

This lightweight yet powerful 3-cylinder marine engine offers an outstanding power-to-weight ratio, making it perfect for both sailboats and compact work vessels.

Custom Gearbox and Configuration Options

The Vetus M3.29K can be customized to suit your vessel’s propulsion setup. Available gearbox options include:

• TMC40P (2/2.60:1) – Standard configuration

• ZF12M (2.114/2.63:1) – For performance craft

• ZF15MIV (2.13/2.99:1) – Ideal for heavy-duty cruising

• TMC60A (2/2.5:1) – For commercial and offshore use

Optional accessories like a calorifier kit for hot water systems and dual alternators are available for added functionality.

Warranty & After-Sales Support – JB Marine GmbH

All Vetus engines supplied by JB Marine GmbH are covered by a 5-year factory warranty or 1,500 operating hours, whichever comes first.

We provide complete after-sales support, including:

• Warranty registration and claims

• Genuine Vetus spare parts

• Authorized servicing and technical assistance

• Global shipping and European parts distribution

With JB Marine GmbH, your investment is protected with comprehensive service and expert support throughout the engine’s life cycle.

Why Buy Your Vetus Marine Engine from JB Marine GmbH

As a trusted European dealer of Vetus marine engines, JB Marine GmbH delivers high-quality propulsion systems backed by expert knowledge, fast logistics, and customer-first service.

Why Choose Us:

•  Authorized Vetus Distributor – 100% genuine marine engines

•  Technical Expertise – Certified marine engineers on staff

•  Fast Delivery – Across Germany, Europe, and international ports

•  Full After-Sales Support – Maintenance, diagnostics, spare parts

•  Personalized Service – Guidance for configuration and installation

Whether for refits, replacements, or new builds, we provide complete Vetus engine solutions tailored to your vessel’s specifications.

Order Your Vetus M3.29K Marine Diesel Engine Today

Looking for a compact, fuel-efficient, and low-maintenance marine engine? The Vetus M3.29K Keel Cooled Model (27 HP) from JB Marine GmbH delivers outstanding reliability, performance, and longevity for every voyage.

 Visit JBMarineGmbH.de to request pricing, configure gearbox options, or speak with a Vetus engine specialist.
Experience cutting-edge marine diesel technology with the trusted service and expertise of JB Marine GmbH.