Vetus M4.45 Marine Diesel Engine – 42 HP
The Vetus M4.45 Marine Diesel Engine is a compact, naturally aspirated four-cylinder inboard diesel engine designed for sailing yachts, displacement motorboats, recreational cruisers, and compatible marine repowering projects.
Delivering 42 HP (30.9 kW) at 3,000 RPM, the M4.45 features a 1.758-litre displacement, indirect diesel fuel injection, freshwater cooling, and a robust mechanical engine design.
Part of the VETUS M-Line, the M4.45 combines smooth four-cylinder operation, reliable auxiliary propulsion, and practical serviceability.
Why Choose the Vetus M4.45?
Reliable 42 HP Performance
The engine delivers 42 HP at the flywheel and approximately 40.8 HP at the propeller shaft, with maximum torque of 106.4 Nm at 1,750 RPM.
Compact Four-Cylinder Design
Its compact construction and approximate 199 kg dry weight with the standard gearbox make it suitable for compatible small-vessel installations.
Quiet and Comfortable Operation
The M-Line incorporates a water-cooled aluminium top cover and noise-reducing air-intake components to help reduce engine-room heat and onboard noise.
Straightforward Maintenance
The naturally aspirated design and mechanical indirect-injection system provide conventional diesel operation without turbocharging or common-rail electronics.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | VETUS |
| Engine Model | M4.45 |
| Engine Series | M-Line |
| Engine Type | Four-stroke marine diesel |
| Configuration | Inline four-cylinder |
| Displacement | 1,758 cm³ / 1.758 litres |
| Maximum Flywheel Power | 42 HP / 30.9 kW |
| Maximum Propeller-Shaft Power | 40.8 HP / 30 kW |
| Rated Engine Speed | 3,000 RPM |
| Maximum Torque | 106.4 Nm at 1,750 RPM |
| Bore × Stroke | 78 × 92 mm |
| Compression Ratio | 22:1 |
| Fuel Injection | Indirect diesel injection |
| Aspiration | Naturally aspirated |
| Cooling System | Freshwater cooling with heat exchanger |
| Optional Cooling | Keel cooling |
| Electrical System | 12V |
| Alternator | 110A |
| Standard Gearbox | TMC60P |
| Optional Gearboxes | ZF12M, TMC60A |
| Saildrive Compatibility | VETUS SP60 |
| Dry Weight with Standard Gearbox | Approximately 199 kg |
| Maximum Backward Installation Angle | 15° |
| Maximum Continuous Lateral Inclination | 25° |
| Applications | Sailing yachts, cruisers and repowering |
Specifications are based on VETUS manufacturer documentation. The exact equipment and installation arrangement depend on the engine’s production version.
Compatible Gearboxes and Control Systems
The Vetus M4.45 supports conventional inboard shaft-drive propulsion and selected saildrive configurations.
| Transmission | Published Reduction Ratios |
|---|---|
| TMC60P | 2.00:1 / 2.50:1 / 2.94:1 |
| ZF12M | 2.14:1 / 2.63:1 |
| TMC60A | 2.00:1 / 2.50:1 |
| VETUS SP60 Saildrive | 2.15:1 / 2.38:1 |
Compatible controls and accessories include VETUS mechanical throttle and shift controls, engine instrumentation, wiring harnesses, flexible engine mounts, and suitable shaft couplings.
The gearbox ratio and propeller must be selected according to the vessel’s displacement, hull design, and intended operating conditions.
Applications and Operating Requirements
The Vetus M4.45 is designed primarily for recreational marine propulsion, including sailing yachts, displacement cruisers, small motorboats, and compatible repowering projects.
Its 42 HP maximum output should not be treated as an unrestricted continuous-duty rating. Installation and operation must follow VETUS recommendations.
Price, Package Contents and Warranty
Price: Contact JB Marine GmbH for a quotation.
Depending on the selected configuration, the package may include:
- Vetus M4.45 marine diesel engine
- Starter motor and 110A alternator
- Freshwater cooling components
- Compatible marine gearbox
- Flexible engine mounts
- Instrument panel and wiring
- Selected installation accessories
The gearbox, saildrive, propeller, exhaust components, shaft coupling, and additional equipment must be specifically confirmed in the quotation.
Warranty: Applicable manufacturer or seller warranty coverage depends on the engine’s condition, production year, market, and supply arrangement. Full warranty terms will be confirmed before purchase.
Frequently Asked Questions
How Much Power Does the Vetus M4.45 Produce?
The Vetus M4.45 delivers 42 HP (30.9 kW) at 3,000 RPM at the flywheel.
Is the Vetus M4.45 a 33 HP Engine?
No. The M4.45 produces 42 HP, while the M4.35 produces 33 HP.
What Is the Displacement of the Vetus M4.45?
The engine has a displacement of 1.758 litres.
Is the Vetus M4.45 Turbocharged?
No. It is a naturally aspirated four-cylinder diesel engine.
Which Marine Gearboxes Are Compatible?
Documented options include the TMC60P, ZF12M, and TMC60A transmissions.
Can the Vetus M4.45 Be Used with a Saildrive?
Yes. A compatible M4.45 configuration can be paired with the VETUS SP60 saildrive.
Buy the Vetus M4.45 from JB Marine GmbH
Looking for a Vetus M4.45 marine diesel engine for sale?
JB Marine GmbH provides quotations for VETUS marine diesel engines, compatible gearboxes, saildrive packages, propulsion accessories, and international shipping.
Contact our sales team with your vessel specifications, preferred transmission configuration, required quantity, and delivery destination.
Request your Vetus M4.45 quotation today.
Website: https://jbmarinegmbh.de/
