Yanmar 3YM30AE Marine Diesel Engine 29 HP – Compact, Efficient & Reliable | JB Marine GmbH
The Yanmar 3YM30AE Marine Diesel Engine (29 HP) is a premium 3-cylinder, 4-stroke inboard diesel engine designed for sailboats and small motor vessels that demand reliable performance, quiet operation, and superior fuel economy.
With a maximum output of 29 horsepower at 3600 RPM, this compact yet powerful engine combines Japanese engineering excellence with Yanmar’s renowned marine-grade durability, making it the ideal choice for vessels between 28 and 36 feet in length.
Built for easy maintenance and dependable operation, the Yanmar 3YM30AE is trusted worldwide for its smooth running, low vibration, and class-leading efficiency.
Powerful, Quiet, and Built for Endurance
The Yanmar 3YM30AE delivers a refined balance of power and efficiency, featuring indirect fuel injection, a water-cooled heat exchanger system, and vibration-dampened flexible engine mounts.
Engineered for long-distance cruising and everyday reliability, it ensures smooth operation, reduced fuel consumption, and lower emissions, ideal for both recreational and light commercial marine use.
This model replaces the previous Yanmar 3YM30 variant, featuring enhanced alternator capacity, improved cooling performance, and optimized combustion for cleaner operation.
Key Features of the Yanmar 3YM30AE Marine Diesel Engine
High Performance in a Compact Design
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Power Output: 29 HP (21.3 kW) at 3600 RPM
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Continuous Power: Approx. 26 HP at 3200 RPM
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Ideal for sailboats, catamarans, and small motor yachts up to 36 feet.
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Compact and lightweight for easy installation in confined engine compartments.
Exceptional Fuel Efficiency
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Indirect fuel injection ensures precise combustion and reduced fuel waste.
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Optimized for low consumption and minimal smoke across varying loads.
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Perfect for long-distance cruising or auxiliary propulsion.
Smooth & Quiet Operation
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3-cylinder, 4-stroke, water-cooled design minimizes vibration and noise.
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Rubber-type flexible engine mounts isolate vibration from the hull.
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Balanced crankshaft and efficient combustion system ensure quiet running.
Reliable Electrical & Cooling Systems
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Equipped with a 12V / 80A alternator for strong, stable electrical output.
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Seawater-cooled via a heat exchanger, maintaining a consistent operating temperature.
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Advanced cooling and lubrication systems ensure long engine life in all conditions.
Easy Maintenance & Serviceability
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Designed with front-mounted service points for easy access.
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Simple oil, fuel, and coolant filter replacement.
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Yanmar’s global dealer network ensures parts and service availability worldwide.
Environmentally Compliant
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Meets EPA Tier 2 and EU Stage II emission standards.
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Low smoke and reduced particulate emissions ensure eco-friendly operation.
Technical Specifications
| Specification | Details |
|---|---|
| Maximum Output | 29 HP (21.3 kW) @ 3600 RPM |
| Continuous Output | Approx. 26 HP @ 3200 RPM |
| Cylinders / Configuration | 3-Cylinder, 4-Stroke Vertical |
| Displacement | 854 cc (0.854 L) |
| Bore × Stroke | 70 mm × 84 mm |
| Fuel System | Indirect Injection |
| Aspiration | Naturally Aspirated |
| Starting System | Electric, 12V – 1.4 kW |
| Alternator Output | 12V / 80A |
| Cooling System | Seawater-cooled via Heat Exchanger |
| Lubrication System | Forced Lubrication |
| Rotation (Viewed from Flywheel) | Counter-Clockwise |
| Mounting | Flexible Rubber Mounts |
| Dry Weight | Approx. 114 kg (251 lbs) |
| Emission Standards | EPA Tier 2, EU Stage II |
Why Choose the Yanmar 3YM30AE from JB Marine GmbH
At JB Marine GmbH, we specialize in genuine Yanmar, Vetus, and Volvo Penta marine diesel engines, offering professional guidance, fast worldwide delivery, and full after-sales support.
Whether you’re a boatbuilder, marina operator, or private yacht owner, our marine specialists help you select the right Yanmar engine to match your vessel’s performance and efficiency requirements.
What You Get with JB Marine GmbH
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Manufacturer-backed warranty for reliability and peace of mind
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Expert consultation for installation and system integration
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Fast and secure shipping across Germany, Europe, and global ports
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Access to genuine Yanmar parts and maintenance support
Warranty Information
All Yanmar marine diesel engines supplied by JB Marine GmbH are covered by a 12-month manufacturer warranty, with extended warranty options available upon request.
Each unit is factory-tested before shipping, ensuring quality, performance, and reliability.
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Standard Warranty: 12 Months (or 1,000 hours, whichever comes first)
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Extended Coverage: Available for commercial and fleet clients
Frequently Asked Questions (FAQ)
What type of boats is the Yanmar 3YM30AE suitable for?
It’s perfect for sailboats, catamarans, and light motorboats between 28–36 feet, designed for reliability and smooth cruising.
Is it easy to install and maintain?
Yes. The compact size, flexible mounts, and accessible service points make installation and maintenance straightforward.
How fuel-efficient is the 3YM30AE?
This engine delivers low fuel consumption with optimized combustion, making it one of the most economical in its class.
What warranty does it include?
All Yanmar engines from JB Marine GmbH come with a standard 12-month warranty, extendable upon request.
How soon can I receive the engine?
Orders typically ship within 3–5 business days after payment confirmation. Delivery times vary by region.
Are spare parts readily available?
Yes — Yanmar has an extensive global parts and service network, ensuring easy access to genuine components anywhere.
Do you offer technical support or installation assistance?
Absolutely. Our marine engineers provide installation guidance and post-sale technical support for seamless operation.
What payment methods do you accept?
We accept bank transfers, PayPal, and major credit cards, with special terms for bulk or trade purchases.
Order Your Yanmar 3YM30AE Marine Diesel Engine 29 HP Today
Upgrade your vessel with the Yanmar 3YM30AE, one of the most trusted marine engines in the world.
Compact, powerful, and fuel-efficient, this engine delivers smooth cruising performance and exceptional reliability.
Contact JB Marine GmbH today for pricing, availability, and professional advice on Yanmar marine diesel engines.
Visit https://jbmarinegmbh.de/ to browse our full range of Yanmar marine diesel engines for sale and experience the best in marine propulsion.









