Vetus M4.45K Marine Diesel Engine – Keel-Cooled Model – 33 HP | Efficient, Quiet & Reliable Inboard Power
The Vetus M4.45K Marine Diesel Engine (33 HP) is a compact, fuel-efficient, and robust inboard engine engineered for sailing yachts, cabin cruisers, canal boats, and small commercial vessels.
Built for reliability, low maintenance, and long service life, the keel-cooled M4.45K is the perfect solution for boaters seeking durable propulsion with minimal corrosion risk and maximum operating efficiency.
As part of the Vetus M-Line Series, this engine represents Dutch engineering excellence — combining low vibration, quiet operation, and impressive fuel economy with a maintenance-friendly design trusted worldwide.
Compact Power & Proven Efficiency
Delivering 33 HP (30.9 kW) at 3000 RPM, the M4.45K offers the perfect balance of power and economy for a wide range of marine applications.
Thanks to its four-cylinder, indirect-injection diesel configuration and self-bleeding fuel system, the M4.45K provides smooth performance, reliable starts, and efficient operation under all sea conditions.
Its keel-cooled design eliminates the need for seawater circulation — making it especially suited for inland waterways, estuaries, and saltwater conditions where corrosion and sediment can affect performance.
Key Features & Benefits
Efficient & Reliable Power Output
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Produces 33 HP at 3000 RPM, ensuring responsive acceleration and consistent cruising speeds.
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High torque at low RPM for dependable propulsion in rough conditions.
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Self-bleeding fuel system simplifies restarts after filter maintenance.
Keel Cooling System – Corrosion-Free Operation
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Indirect cooling system with keel cooling option prevents seawater exposure.
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No seawater pump required, minimizing maintenance needs.
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Prevents corrosion and scaling, ideal for inland and coastal applications.
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Ensures extended engine lifespan and superior reliability.
Low Noise & Vibration Levels
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Water-cooled aluminum top cover reduces engine temperature by up to 15°C.
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Enhanced air intake filter reduces induction noise by ≈5 dB(A).
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Balanced cylinder configuration delivers smooth, vibration-free operation.
Easy Maintenance & Longevity
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Front-mounted service points for quick access to the oil dipstick, fuel filter, and impeller.
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Simplified hose layout reduces the risk of leaks or component wear.
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Heavy-duty construction ensures durability in commercial and leisure operations.
High Electrical Output for Marine Systems
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Standard 12V – 110 Amp alternator for fast, efficient charging.
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Optional second alternator for dual-battery systems or high onboard loads.
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Complies with the EC Machinery Directive and marine safety standards.
Technical Specifications
| Specification | Details |
|---|---|
| Max Output (Flywheel, ISO 3046-1) | 30.9 kW (42 HP) |
| Max Output (Propeller Shaft) | 30 kW (40.8 HP) |
| Rated Power Output | 33 HP @ 3000 RPM |
| Number of Cylinders | 4 |
| Bore × Stroke (mm) | 78 × 92 |
| Displacement | 1758 cm³ |
| Alternator | 12V – 110 Amp |
| Cooling System | Indirect (Keel Cooling Optional) |
| Standard Gearbox | TMC60P (2/2.5/2.94:1) |
| Optional Gearboxes | ZF12M (2.14/2.63:1), TMC60A (2/2.5:1) |
| Dry Weight | 199 kg |
| Max Installation Angle (Backwards) | 15° |
| Max Continuous Lateral Inclination | 25° |
| Max 5-Minute Inclination | 30° |
| Fuel Lift Pump Suction Height | 1.5 m |
| Warnings & Alarms for | Oil Pressure, Coolant & Exhaust Temp, Charging Current |
| Control Lights for | Pre-heating |
| Calorifier Kit | Optional |
| Certifications | EU-RCD II, BSO, SOLAS |
Why Buy the Vetus M4.45K from JB Marine GmbH
At JB Marine GmbH, we supply genuine Vetus marine diesel engines directly from the manufacturer, ensuring full warranty coverage, competitive pricing, and expert support.
Our marine propulsion specialists help you select the right engine, gearbox, and configuration for your vessel, and provide professional after-sales service and global delivery.
What You Get with JB Marine GmbH
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Authentic Vetus M4.45K Marine Diesel Engine (Keel-Cooled Model)
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5-Year Manufacturer Warranty or 1500 operating hours
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Professional advice for engine selection and installation
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Fast global shipping (Germany, Europe & international ports)
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Genuine Vetus spare parts and long-term service support
Warranty Information
Every Vetus diesel engine purchased from JB Marine GmbH includes the official 5-year or 1500-hour manufacturer warranty, covering materials and workmanship.
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Standard Warranty: 5 Years / 1500 Hours
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Extended Coverage: Available upon request
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Support: Warranty registration, servicing, and spare parts handled by our dedicated team
Frequently Asked Questions (FAQ)
What is the price of the Vetus M4.45K Marine Diesel Engine?
Prices vary by gearbox type, configuration, and accessories. Contact JB Marine GmbH for a personalized quote.
What are the benefits of keel cooling?
Keel cooling eliminates seawater exposure, reducing corrosion and pump maintenance — ideal for shallow or sediment-prone waters.
Can the M4.45K be paired with different gearboxes?
Yes — the standard TMC60P gearbox can be replaced with ZF12M or TMC60A options depending on your installation requirements.
What makes this engine fuel-efficient?
Efficient torque delivery, self-bleeding fuel system, and an indirect cooling design ensure optimal combustion and reduced fuel consumption.
Do you offer international delivery?
Yes — we provide Standard, Express, and Freight shipping worldwide, ensuring secure and timely delivery.
Order Your Vetus M4.45K Marine Diesel Engine (Keel-Cooled Model – 33 HP) Today
Experience the perfect combination of power, efficiency, and reliability with the Vetus M4.45K Marine Diesel Engine.
Contact JB Marine GmbH today for the best pricing, technical support, and worldwide delivery.
Visit https://jbmarinegmbh.de/ to explore our complete range of Vetus marine diesel engines for sale — from compact two-cylinder models to high-output propulsion systems.
