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Yanmar53 HP
Yanmar 4JH45E 53.8HP
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New
Yanmar
Yanmar 3YM30AE 29.1 HP
$3,100.00
Yanmar 3YM30AE – 29.1 HP marine diesel engine, 3-cylinder, 1.27 L displacement, 4-stroke, water-cooled, suitable for sailboats and pleasure craft.
Horsepower
29 HP
Fuel Type
diesel
Displacement
1.266 L / 77 cu. in
Rated Output
21.3 kW / 29.1 mhp
Rated Speed
3200 rpm
In Stock (3 available)
Free shipping on orders over $500
90-day warranty included
Description
Buy new Yanmar 3YM30AE engines for sale or browse used Yanmar 3YM30AE marine engines built for reliable marine power and long-term performance. The Yanmar 3YM30AE is a trusted option for boat owners searching for compact marine diesel engines, dependable propulsion systems, and efficient replacement engine solutions. Designed for durability and economical operation, this engine supports smooth performance across sailing and recreational boating applications.
The Yanmar 3YM30AE is a compact 3-cylinder marine diesel engine developed to deliver dependable output and efficient fuel consumption. Its advanced marine design provides reliable operation while maintaining consistent performance in changing marine environments.
Built with a 4-stroke vertical water-cooled configuration, this engine promotes effective temperature control and dependable long-term operation. The compact structure also supports efficient installation for vessels where space and performance are equally important.
Featuring natural aspiration and indirect fuel injection technology, the Yanmar 3YM30AE delivers smooth acceleration, quieter engine operation, and improved fuel economy. The balanced engine platform helps reduce operating costs while maintaining steady and reliable marine performance.
Ideal for sailboats and smaller vessels, the Yanmar 3YM30AE combines durable engineering with flexible installation capability. Its practical design supports engine replacement projects, vessel upgrades, and dependable day-to-day marine operation.
Boat owners searching for used Yanmar 3YM30AE engines, planning marine engine upgrades, or looking to buy new marine engines for sale continue to choose this model for its efficient performance and trusted marine reliability. Built to meet modern emission requirements, the Yanmar 3YM30AE remains a preferred solution for long-term ownership.
Key Features:
• Yanmar 3YM30AE 3-cylinder marine diesel engine
• Compact and space-efficient design
• 4-stroke vertical water-cooled configuration
• Natural aspiration system
• Indirect fuel injection technology
• Smooth and economical performance
• Flexible installation capability
• Reliable propulsion for sailboats and small vessels
• Durable construction for marine environments
• Emission-compliant engine design
Specifications
SKUY096421
BrandYanmar
CategoryInboard Engines
ConditionNew
Horsepower29 HP
Fuel Typediesel
Displacement1.266 L / 77 cu. in
No. of Cylinders3 cylinders
Rated Output21.3 kW / 29.1 mhp
Rated Speed3200 rpm
Cylinder Bore x Stroke80 mm x 84 mm / 3.15 in x 3.31 in
Combustion SystemIndirect Injection, In-line Pump
AspirationNatural
Alternator12V - 125A
Dry Weight127 kg / 280 lbs
Dimensions715 mm x 485 mm x 545 mm
ControlsMechanical
CertificationsRCD 2 EPA Tier 3 EPA Tier 3C BSO II EMC
Frequently Asked Questions
What is the Yanmar 3YM30AE engine?
The Yanmar 3YM30AE is a 3-cylinder, 4-stroke, vertical water-cooled marine diesel engine with a rated output of 29.1 metric horsepower (21.3 kW) at 3200 rpm, designed primarily for pleasure craft and small motorboats.
What are the core specifications of this engine?
Rated Power: 29.1 mhp (21.3 kW) at 3200 rpm Displacement: 1.266 L (77 cu in) Cylinders: 3 Combustion: Indirect injection, in-line pump. Aspiration: Natural Alternator: 12 V – 125 A Dry Weight (without gear): ~127 kg (280 lbs) Controls: Mechanical
What type of cooling system does it use?
The 3YM30AE uses a freshwater cooling system with a heat exchanger, which helps prevent corrosion from raw seawater and keeps the engine operating at the correct temperature.
What components come with the standard engine package?
Exhaust mixing elbow (L-type) Alternator 12 V – 125 A B20 control panel Flexible engine mounts Expansion tank for the freshwater cooling system Electric stop solenoid Belt safety cover.
What optional accessories are available?
High-riser exhaust mixing elbow Extension or dual wiring harnesses TFX sidemount control head Hot water kit Saildrive leg extension Spare parts kit .
What kind of boats is the 3YM30AE ideal for?
This engine is commonly used as auxiliary power or primary propulsion on small sailboats, cruisers, and recreational motorboats where compact size, reliability, and diesel fuel economy are important.
How often should routine maintenance be performed?
Oil and filter changes: Typically every ~100 hours or annually (whichever comes first). Raw water pump impeller: Inspect/replace every 1–2 years. Fuel filters & separators: Drain and check frequently; replace per manual intervals. Cooling system: Clean heat exchanger regularly to prevent salt buildup.
Can I do maintenance myself?
Basic checks (oil level, coolant level, belts) can be done by knowledgeable owners. However, Yanmar recommends that more complex tasks and diagnostics be performed by authorized dealers to ensure correct procedures and protect warranty.
What makes Yanmar engines like the 3YM30AE reliable?
Yanmar’s marine diesels are known for robust construction, simple mechanical design, and efficient combustion, which help provide quiet operation, strong low-end torque, and long life when properly maintained.
What fuel should I use?
Use marine diesel fuel that meets local specifications. Diesel offers good energy density, fuel economy, and safety on board compared to gasoline. Proper fuel filtration and water separators are important because marine diesel systems are sensitive to water contamination.
