Vetus M2.13S vs Yanmar 2YM15 SD20 vs Volvo Penta D1-13 Saildrive — Which Small Sailboat Diesel is Best?
Head-to-head comparison of three leading 12–14hp saildrive diesel engines for small yachts and cruisers
Introduction
When repowering a 20–28 ft sailboat, the 12–14hp saildrive diesel class offers the ideal balance of compact size, fuel efficiency, and reliability. Three leading options dominate this segment:
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Vetus M2.13S (12hp)
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Yanmar 2YM15 SD20 (14hp)
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Volvo Penta D1-13 Saildrive (13hp)
At Wave Inboard Motors, we’ve installed all three engines for owners of small sailboats and pocket cruisers. Each model has its strengths, from Vetus’ compact footprint to Yanmar’s worldwide service reach and Volvo’s robust dealer support.
This guide compares them side by side to help you choose the best option for your yacht.
Side-by-Side Specification Table
| Feature | Vetus M2.13S | Yanmar 2YM15 SD20 | Volvo Penta D1-13 Saildrive |
|---|---|---|---|
| Power Output | 12 hp (8.8 kW) @ 3,600 rpm | 14 hp (10.3 kW) @ 3,600 rpm | 13 hp (9.6 kW) @ 3,200 rpm |
| Cylinders | 2-cylinder diesel | 2-cylinder diesel | 2-cylinder diesel |
| Displacement | 0.52 L | 0.57 L | 0.77 L |
| Weight (w/ saildrive) | ~120 kg | ~145 kg | ~150 kg |
| Cooling System | Freshwater + heat exchanger | Freshwater + heat exchanger | Freshwater + heat exchanger |
| Alternator Output | 12V – 60A | 12V – 80A | 12V – 115A |
| Service Network | Moderate global | Excellent worldwide | Excellent (Europe/North America) |
Key Comparison Factors
🔹 Power & Performance
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Yanmar 2YM15 SD20: Strongest of the three at 14hp, ideal for slightly larger or heavily loaded boats.
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Volvo D1-13: Middle ground at 13hp, robust low-end torque with lower max RPM.
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Vetus M2.13S: Lightest at 12hp, best suited for smaller yachts or lighter cruising needs.
👉 Winner: Yanmar 2YM15 SD20 for power.
🔹 Weight & Compactness
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Vetus M2.13S: Lightest and most compact — a real advantage for boats under 26 ft.
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Yanmar 2YM15 & Volvo D1-13: Both heavier but better suited for slightly larger yachts.
👉 Winner: Vetus M2.13S for smaller boats.
🔹 Fuel Efficiency
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All three engines are very efficient, typically consuming 1–2 L/hr at cruising speed.
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Yanmar’s common design tends to edge slightly ahead in real-world efficiency.
👉 Winner: Yanmar 2YM15 SD20 (slight).
🔹 Noise & Vibration
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All three are 2-cylinder engines, so moderate vibration is expected compared to 3-cylinder models.
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Volvo Penta D1-13 is noted for smoother running at lower RPM.
👉 Winner: Volvo Penta D1-13 (slight).
🔹 Service & Parts Availability
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Yanmar: Best global coverage, especially in Asia and remote cruising grounds.
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Volvo Penta: Excellent in Europe & North America, slightly less global reach.
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Vetus: Solid but smaller network than Yanmar/Volvo.
👉 Winner: Yanmar 2YM15 SD20.
Pros and Cons Summary
| Engine Model | Pros ✅ | Cons ⚠️ |
|---|---|---|
| Vetus M2.13S | Compact, lightweight, affordable | Smaller global support network |
| Yanmar 2YM15 SD20 | Strongest power, excellent service network | Heavier than Vetus |
| Volvo Penta D1-13 | Smooth low-RPM running, strong dealer network | Heaviest of the three |
Expert Recommendation
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For 20–26 ft sailboats, the Vetus M2.13S is an excellent choice thanks to its compact design and light weight.
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For 26–30 ft yachts or sailors planning longer cruises, the Yanmar 2YM15 SD20 is the best all-around choice with extra horsepower and superior service support.
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For owners in Europe or North America who value smooth low-RPM running, the Volvo Penta D1-13 Saildrive is a strong alternative.
👉 At Wave Inboard Motors, we install and support all three models, ensuring you get the right match for your yacht and cruising style.
Internal Links to Product Pages:
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【Vetus M2.13S Marine Diesel Engine with Saildrive 12hp】
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【Yanmar 2YM15 Marine Diesel Engine 14hp】
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【Volvo Penta D1-13 Marine Diesel Engine 13hp】
Internal Links to Related Blogs:
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【Saildrive vs Shaft Drive: Pros and Cons for Sailors】
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【Best Diesel Engines for 20–30 ft Sailboats】
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【When to Repower a Small Sailboat Diesel Engine】
Internal Links to Services:
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【Marine Engine Repowering Services】
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【Professional Saildrive Installation & Support】
