The Yanmar 3YM30AE Marine Diesel Engine is a 3-cylinder, 4-stroke, freshwater-cooled diesel engine designed to deliver 29hp at 3200 rpm. This engine is compact, reliable, and fuel-efficient, making it ideal for sailboats, small yachts, and other vessels requiring dependable power. The 3YM30AE is engineered for smooth operation with low noise and vibration, ensuring a comfortable onboard experience even on long voyages.
The Yanmar 3YM30AE features direct fuel injection, which increases fuel efficiency and reduces exhaust emissions, ensuring compliance with international environmental standards such as EPA Tier 2 and EU RCD emissions regulations. It also features a freshwater cooling system with a heat exchanger, which helps to prevent internal corrosion and maintains optimal engine temperature, extending the engine’s service life.
Technical Specifications:
- Engine Model: 3YM30AE
- Engine Type: 3-cylinder, 4-stroke, vertical water-cooled diesel engine
- Displacement: 1.267 litres (1267 cc)
- Bore x Stroke: 88 mm x 90 mm
- Power Output: 29hp (21.3 kW) at 3200 rpm
- Compression Ratio: 23.3:1
- Cooling System: Freshwater cooling with heat exchanger
- Fuel Injection System: Direct injection
- Alternator Output: 12V – 125A
- Lubrication System: Forced lubrication by trochoid pump
- Oil Capacity: 5.4 litres
- Starting System: Electric start
- Direction of Rotation: Counterclockwise (viewed from flywheel)
- Weight: 148 kg (without gearbox)
- Gearbox Options: KM35P, KMH4A (mechanical or hydraulic)
- Reduction Ratios: 2.21:1 or 3.22:1 (KM35P)
- Exhaust System: Water-cooled, with wet exhaust manifold
- Fuel Consumption: Approx. 2.0 litres/hour at cruising speed
- Emission Compliance: Meets EPA Tier 2, EU RCD emissions standards
Key Features:
- High Power Output: 29hp engine designed for small to medium-sized vessels.
- Fuel Efficiency: Direct injection system ensures better fuel economy and lower emissions.
- Durable Freshwater Cooling: Prevents internal corrosion and helps maintain consistent engine temperatures.
- Low Noise and Vibration: Smooth operation for a quieter and more comfortable boating experience.
- Compact Design: Ideal for vessels with limited engine space.
- Environmentally Friendly: Complies with global emission standards.
Yanmar is a globally recognised leader in marine propulsion, offering high-performance diesel engines built for durability, fuel efficiency, and reliable performance. The Yanmar 3YM30AE is designed for long-lasting operation in the toughest marine environments, providing a smooth, efficient power source for sailboats and small yachts.
Yanmar 3YM30AE engine is available with three transmission options for marine applications. The KM2P-1 is a mechanical marine gear that provides smooth operation with a hydraulic clutch and selectable gear ratios. The SD25 SailDrive is a compact, low-vibration system that integrates directly with specific Yanmar engines, offering enhanced performance for sailboats. Additionally, bobtail engines are available, which are complete engine replacements for both stern drive and inboard applications, including essential systems such as fuel, electrical, cooling, and exhaust.
