Vetus M4.45K Marine Diesel Engine – Keel Cooled Model (33 HP) | JB Marine GmbH

The Vetus M4.45K Marine Diesel Engine Keel Cooled Model (33 HP) is a compact, efficient, and ultra-reliable propulsion system designed for sailing yachts, cabin boats, and light commercial vessels. Built to perform in demanding marine conditions, it provides smooth operation, low fuel consumption, and long service life, ideal for both inland waterways and coastal cruising.

At JB Marine GmbH, we supply genuine Vetus marine diesel engines across Germany and Europe, offering full factory warranty coverage, expert installation support, and professional after-sales service.

Efficient, Quiet & Reliable Marine Power

The Vetus M4.45K is part of the renowned Vetus M-Line, a series engineered for optimal fuel economy, reduced vibration, and exceptional ease of maintenance. With 33 HP at 3000 RPM, this four-cylinder diesel engine delivers dependable propulsion and impressive torque, even in challenging sea conditions.

Key Highlights:

• Power Output: 33 HP at 3000 RPM

• Torque-Rich Performance: Smooth acceleration at low RPM

• Fuel-Efficient Design: Optimized for long cruising ranges

• Self-Bleeding Fuel System: Effortless restarts after maintenance

• Keel Cooling System: No seawater in the circuit, preventing corrosion

Engineered for professional mariners and sailing enthusiasts alike, the M4.45K offers reliable power in a compact, easy-to-install design.

Keel-Cooled System – Ideal for Demanding Marine Environments

Unlike traditional seawater-cooled engines, the Vetus M4.45K Keel-Cooled Model is designed to eliminate the risk of corrosion, blockages, and salt deposits within the cooling system. This makes it a preferred choice for:

• Inland waterways and canals with high sediment content

• Coastal operations where corrosion resistance is critical

• Commercial vessels operating in variable water conditions

Advantages of the Keel-Cooled System:

• No seawater enters the engine — minimizing corrosion and scale

• Reduced maintenance and component wear

• Stable engine temperature in all conditions

• Perfect for extended cruising and shallow waters

This smart, maintenance-friendly cooling system ensures long-term durability, even in heavy-duty use.

Low Noise, Low Vibration – A Quieter Journey

Comfort matters when you’re at sea. That’s why the M4.45K features advanced sound-dampening and vibration reduction engineering:

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

• Optimized air intake filter lowers induction noise by 5 dB(A)

• Balanced four-cylinder design delivers smoother, quieter operation

The result? A refined, peaceful onboard experience, even under continuous operation.

Easy Maintenance & Long Service Life

Routine maintenance is quick and straightforward, thanks to front-mounted service points for the oil dipstick, fuel filter, and impeller. The engine’s minimal hose layout reduces leak potential and makes inspection easier.

Maintenance Benefits:

• Convenient access to all serviceable parts

• 500-hour service interval for reduced downtime

• Heavy-duty components ensure extended engine life

• Reliable operation under continuous duty

Built for simplicity and strength, the Vetus M4.45K is trusted by marine professionals worldwide.

High Electrical Output for Marine Applications

Equipped with a 110 Amp alternator, the M4.45K ensures fast and efficient battery charging, critical for vessels with modern electronics and auxiliary systems. For larger yachts, an optional second alternator can be installed to support dual battery banks or high-demand electrical systems.

Fully compliant with the EC Machinery Directive, EU-RCD II, and SOLAS safety standards, this engine meets or exceeds global marine regulations.

Technical Specifications – Vetus M4.45K Marine Diesel Engine

Compact yet powerful, this engine is ideal for both commercial operators and private yacht owners who prioritize reliability and efficiency.

Customizable Options

To suit different vessel setups, the Vetus M4.45K can be configured with several gearbox and electrical options, including:

• ZF12M and TMC60A gearboxes for varying ratios

• Additional alternator for dual battery systems

• Calorifier connection kit for onboard hot-water systems

These options allow total flexibility in adapting the M4.45K to your boat’s technical requirements.

Warranty & After-Sales Support – JB Marine GmbH

All Vetus marine diesel engines supplied by JB Marine GmbH include full manufacturer warranty coverage for peace of mind and long-term value.

Warranty Details:

• Standard Coverage: 5 years or 1,500 hours (whichever comes first)

• Extended Coverage: Available upon request

Our team provides:

• Expert installation guidance

• Genuine Vetus spare parts

• Professional maintenance and diagnostics

• Europe-wide service and technical assistance

When you choose JB Marine GmbH, you’re choosing a partner with deep expertise in marine diesel systems, trusted across Europe.

Why Choose JB Marine GmbH for Your Vetus Diesel Engine

As an authorized Vetus distributor, JB Marine GmbH delivers genuine Vetus products with competitive pricing and personalized customer support.

Our Commitment:

•  Official Vetus Dealer – Genuine parts and full warranty

•  Professional technical advice and installation support

•  Fast Europe-wide delivery and international shipping

•  Complete after-sales service and diagnostics

•  Dedicated customer care and response team

We help every customer find the perfect inboard marine engine solution, whether for commercial use or private yachts.

Order Your Vetus M4.45K Marine Diesel Engine Today

Looking for a fuel-efficient, reliable keel-cooled marine diesel engine? The Vetus M4.45K (33 HP) from JB Marine GmbH delivers professional-grade power and performance in a compact package.

Contact our marine specialists today for a customized quote, gearbox configuration advice, or international shipping details.

 Visit JBMarineGmbH.de to request pricing, learn more about the Vetus M4.45K Marine Diesel Engine, or explore our full range of Vetus inboard marine engines for sale.