Vetus M3.29 Marine Diesel Engine: Compact 27hp Power
Smooth, Modern, and Space-Saving Performance for Mid-Size Sailboats
Introduction
The Vetus M3.29 marine diesel engine is a standout in the compact diesel market, offering a unique blend of smooth three-cylinder power and an incredibly space-efficient design. At Wave Inboard Motors, our technicians are experts in a wide range of brands, and our hands-on experience with the Vetus M3 series has shown it to be a brilliant solution for sailboats where every inch of engine room space is precious. This 27hp marine diesel engine delivers the refined operation modern boat owners expect, without the bulk of traditional engines.
Engineered for vessels between 30 and 36 feet, the M3.29 is the ideal compact marine diesel for both repower projects and new installations. Its modern design incorporates a standard fresh-water cooling system for extended life and a powerful alternator to meet modern electrical demands. For owners seeking an innovative, feature-rich, and smooth-running diesel, the Vetus M3.29 for sale represents a sophisticated and practical European-engineered option.
This page will provide a detailed look at its innovative specifications, show how it compares to its key competitors, and outline why it is a smart choice for a sailboat repower project.
Technical Specifications Table
| Specification | Detail |
|---|---|
| Model | Vetus M3.29 |
| Engine Type | 3-Cylinder, 4-stroke, water-cooled diesel |
| Displacement | 1.1 L (1100 cc) |
| Max Output | 27 HP (20 kW) @ 3600 RPM |
| Bore x Stroke | 69.6 mm x 76 mm |
| Compression Ratio | 23.0:1 |
| Cooling System | Heat Exchanger (Closed-Cooling) |
| Starting System | 12V Electric Start |
| Alternator Output | 12V – 55A (115A optional) |
| Dry Weight | 92 kg (203 lbs) |
| Dimensions (LxWxH) | Approx. 598mm x 505mm x 505mm |
| Gear Ratio | 2.62:1 (Standard on Vetus gear) |
Competitor Comparison Table
| Feature | Vetus M3.29 | Yanmar 3YM30 | Volvo Penta D1-30 |
|---|---|---|---|
| Engine Type | 3-Cylinder, Electronic | 3-Cylinder, Electronic | 3-Cylinder, Electronic |
| Power (HP) | 27 HP @ 3600 RPM | 29 HP @ 3600 RPM | 27 HP @ 3500 RPM |
| Key Strength | Extremely Compact, Lightest Weight | Yanmar Brand Reputation & Slightly Higher HP | Volvo Penta Dealer Network |
| Weight | 203 lbs (92 kg) | 315 lbs (143 kg) | 309 lbs (140 kg) |
| Reliability | Excellent (Mitsubishi-based block) | Exceptional | Very Good |
| Cooling System | Heat Exchanger (Standard) | Heat Exchanger (Standard) | Heat Exchanger (Standard) |
| Innovation | Excellent (Space-saving design) | Very Good | Good |
Verdict: The Vetus M3.29 wins decisively on compactness and weight, being significantly lighter and more space-efficient than its direct competitors. This makes it the premier choice for tight engine compartments and performance-oriented boats where weight savings are critical. While the Yanmar 3YM30 offers slightly more horsepower and the Volvo Penta has a strong network, the Vetus’s innovative packaging and Mitsubishi-based reliability make it a top-tier contender for the savvy buyer.
Replacement Options Table
| Consideration | Rebuild Older Engine (e.g., Universal 25) | Install Remanufactured M3.29 | Install Brand New M3.29 |
|---|---|---|---|
| Condition | Outdated technology, potential for hidden issues | Like-new, zero hours, modern performance | Perfect, factory-fresh with full warranty |
| Warranty | None (on rebuild itself) | Full 1-Year Parts & Labor Warranty | Full Vetus Factory Warranty |
| Power | Original HP | 27 HP | 27 HP |
| Noise/Vibration | Typically higher | Low (Modern, balanced three-cylinder) | Lowest |
| Total Project Value | Lowest (Investing in old tech) | High (Best value for performance) | Highest (Peak performance & warranty) |
Expert Recommendation: For most owners looking to upgrade from an older, heavier engine, a professionally remanufactured Vetus M3.29 offers exceptional value. The combination of modern three-cylinder smoothness, a standard heat exchanger, and dramatic weight savings can transform a boat’s performance and sailing characteristics. The space-saving design can also simplify installation. While a new engine is excellent, the remanufactured option provides these transformative benefits at a more accessible price point.
Pros and Cons Table
| Pros | Cons |
|---|---|
| Extremely Compact and Lightweight | Vetus-specific parts may not be as ubiquitous as Yanmar/Volvo in some regions |
| Smooth & Quiet Three-Cylinder Operation | Requires a knowledgeable installer for optimal setup |
| Mitsubishi-Based Block for Proven Reliability | |
| Standard Heat Exchanger Cooling for Longevity | |
| Powerful Alternator Options | |
| Innovative, Space-Saving Design |
Link to Our Core Service Pages:
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“Ensure a perfect fit in a tight engine room with our 【Marine Engine Installation Services】.”
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“Protect your investment with our tailored 【Annual Marine Engine Maintenance】 plans.”
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“Our experts can manage your entire 【Sailboat Repower Project】 from start to finish.”
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“We source and supply 【Vetus Marine Engine Parts】 and filters for all your service needs.”
Link to Informational Blog Posts:
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“Is it the right time? Learn the 【5 Signs You Need a Marine Engine Repower】.”
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“Understand the benefits in our guide 【The Impact of Weight on Sailboat Performance】.”
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“Planning your project? We break down the 【Costs of Repowering a Sailboat】.”
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“We explain the critical factors in 【Choosing the Right HP for Your Sailboat Repower】.”
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