Yanmar 3YM20 Inboard Diesel Engine

We have Yanmar 3YM20 for sale which represents the latest advancement in compact marine diesel technology. Designed to meet the power needs of smaller boats and sailboats, this three-cylinder engine offers 21HP (15.3kW) at 3,600 rpm, providing exceptional power and efficiency. With a completely redesigned cylinder block and combustion system, the 3YM20 is engineered for quiet, vibration-free running, making it an ideal choice for those seeking performance and comfort on the water.

Yanmar 3YM20  Specifications

• Rated Output: 15.3 kW / 21 mhp

• Rated Speed: 3,600 rpm

• Displacement: 0.854 L / 52.1 cu. in

• Number of Cylinders: 3 cylinders

• Cylinder Bore x Stroke: 70 mm x 74 mm / 2.76 in x 2.91 in

• Combustion System: Indirect Injection, In-line Pump

• Aspiration: Natural

• Alternator: 12V – 125A

• Dry Weight without Gear: 110 kg / 243 lbs

• Dimensions: 694 mm x 463 mm x 600 mm

• Controls: Mechanical

• Certifications: RCD 2 EPA Tier 3, EPA Tier 3C, BSO II, EMC

Standard Engine Package

• Exhaust mixing elbow [L-type]

• Alternator 12V – 125A

• B20 panel

• Flexible mounts

• Expansion tank for fresh water cooling system

• Electric stop solenoid

• Belt safety cover

Optional Accessories

• High-riser mixing elbow [instead of L-elbow]

• Extension wire harness [4m, 6m]

• Dual harness [for 2nd station]

• TFX Sidemount control head

• Hot water kit with cocks

• Extension saildrive leg [50 mm]

• Propeller cone nut kit SD25

• On-board spare parts kit

Key Features & Benefits

• Compact and Lightweight: At just 110 kg (243 lbs), the 3YM20 is an easy fit for a variety of small boats and sailboats.

• Quiet Operation: With a newly designed combustion system, the 3YM20 delivers a quiet, smooth performance, reducing engine noise and vibration for a more enjoyable boating experience.

• Improved Power and Efficiency: Compared to its predecessor, the Yanmar 2GM20, the 3YM20 offers approximately 17% more power, ensuring better performance.

• EPA Tier 2 & BSO/SAV Stage 2 Compliant: The engine meets strict environmental standards, offering reduced emissions for a cleaner marine environment.

• Simplified Maintenance: Maintenance tasks such as oil changes, water pump servicing, and fuel filter replacement are made easy with strategically placed service points on the engine.

Applications

• Ideal for small motorboats and sailboats

• Suitable for use in various marine environments, providing reliability and efficiency

• Perfect for boat owners looking for an engine that offers excellent fuel economy and minimal noise.

Frequently Asked Questions (FAQs)

Q: What is the weight of the Yanmar 3YM20 engine?
A: The Yanmar 3YM20 engine weighs approximately 110 kg (243 lbs) without gear.

Q: What is the recommended fuel for this engine?
A: The Yanmar 3YM20 runs on diesel fuel with a density of 0.842 g/cm³ at 15°C.

Q: What are the maintenance intervals for the Yanmar 3YM20?
A: Maintenance tasks such as oil changes, water pump servicing, and fuel filter replacement should be performed regularly, with intervals recommended in the owner’s manual.

Q: Can this engine be used for sailboats?
A: Yes, the 3YM20 is available with a saildrive option (3YM20C) and is perfect for sailboats.

Q: What is the engine’s rated speed?
A: The rated speed of the Yanmar 3YM20 is 3,600 rpm.

Q: Does the engine come with a warranty?
A: Yes, Yanmar engines come with a standard warranty. Details on coverage can be found in the warranty documentation.

This engine is available for purchase, and with Yanmar’s reputation for durability and performance, the 3YM20 is an excellent choice for reliable marine propulsion