New YANMAR 3YM20 21HP Marine Inboard Engine

Description

YANMAR 3YM20 21HP Marine Inboard Engine for Sale – Compact Diesel Engine for Small Boats

The YANMAR 3YM20 21HP Marine Inboard Diesel Engine is one of the most popular choices among boat owners and marine professionals looking for a compact, fuel-efficient, and environmentally friendly propulsion solution. Ideal for sailing yachts, catamarans, small motorboats, and light commercial vessels, this 3-cylinder, 4-stroke diesel engine offers outstanding reliability and performance in tight engine spaces.

Marine Inboard Specialists is your trusted source for genuine YANMAR inboard marine engines for sale, offering professional advice, expert support, and fast worldwide delivery to meet your boating needs.

Why Choose the YANMAR 3YM20 21HP Marine Inboard Engine?

The YANMAR 3YM20 is built for those seeking a dependable and clean-running engine that doesn’t compromise on power or efficiency. With its naturally aspirated design, lightweight construction, and minimal vibration, it ensures a smooth and quiet ride on the water. It is perfect for both new installations and repower projects.

Key Features:

• Compact and Lightweight: Only 114 kg (251 lbs), making it easy to install in smaller engine compartments.

• Powerful Performance: Delivers 21 horsepower at 3,600 RPM – ideal for vessels up to 30 feet.

• Fuel Efficiency: Optimized YANMAR engineering for reduced fuel consumption and extended range.

• Low Noise and Vibration: Precision-engineered to reduce onboard noise and enhance cruising comfort.

• Environmentally Compliant: Meets IMO Tier II and EPA Tier II emissions regulations.

• Reliable and Durable: Backed by a full 5-Year Manufacturer’s Warranty from YANMAR.

Applications

The YANMAR 3YM20 21HP Marine Inboard Engine is perfectly suited for:

• Sailing yachts (small to medium-sized)

• Catamarans up to 30 feet

• Sloops and small cruisers

• Light-duty fishing boats

• Compact displacement motorboats

Whether you’re repowering or fitting a new hull, this engine provides excellent versatility and ease of integration.

Technical Specifications

What’s Included in the Package?

When you purchase the YANMAR 3YM20 21HP engine from Marine Inboard Specialists, your package includes:

• Brand new YANMAR 3YM20 inboard engine

• Factory-installed KM2P-1 gearbox

• Freshwater cooling system with heat exchanger

• 12V starter motor and 125A alternator

• Flexible mounts for reduced vibration

• Fuel pre-filter with water separator

• L-type exhaust mixing elbow

• 5-meter engine wiring harness

• Belt safety cover

• Freshwater expansion tank

• Detailed installation and operation manuals

All components are original and directly sourced from YANMAR to ensure longevity and performance.

Optional Accessories

Upgrade or customize your marine diesel engine with these YANMAR-certified accessories:

• High-riser exhaust mixing elbow

• Secondary alternator (12V – 125A or 24V – 60A)

• VC10 vessel control system

• NMEA2000 engine monitoring kit

• Extended wiring harness options (3m, 5m, 10m)

• Hot water integration kit

• Spare parts kit for onboard use

• Propeller cone nut kit for KM2P gearbox

Warranty Information

The YANMAR 3YM20 is covered by a 5-Year Manufacturer’s Warranty, providing assurance against manufacturing defects and ensuring your investment is protected. Marine Inboard Specialists also offers extended service plans and dedicated after-sales support for added convenience.

Frequently Asked Questions

1. Is this engine suitable for repowering projects?

Yes. Its compact dimensions and lightweight build make it ideal for repowering older vessels with limited engine space.

2. Does the YANMAR 3YM20 21hp come with a gearbox?

Yes. A factory-installed KM2P-1 gearbox is included in the standard package.

3. What fuel does this engine use?

The YANMAR 3YM20 runs on standard marine-grade diesel fuel.

4. How fuel-efficient is the 3YM20?

This engine is optimized for low fuel consumption, helping reduce operating costs while extending range during long trips.

5. Is this a good engine for small catamarans?

Absolutely. The 3YM20’s output and compact form make it a popular choice for catamarans up to 30 feet.

6. Does Marine Inboard Specialists ship internationally?

Yes. We offer worldwide shipping with full tracking and logistics coordination to ensure safe and timely delivery.

7. Do you offer professional installation?

Yes. We can assist with installation services or connect you to qualified marine technicians in your region.

Order the YANMAR 3YM20 Today from Marine Inboard Specialists

If you’re looking to buy a YANMAR 3YM20 marine inboard engine online, Marine Inboard Specialists offers unbeatable value, technical expertise, and a proven track record of customer satisfaction.

Contact us today for a personalized quote, shipping information, or to discuss optional upgrades. Our team is here to support your next marine engine purchase from consultation to installation.