Yanmar 3GMC Marine Diesel Engine

The Yanmar 3GMC is a compact, efficient, and highly reliable marine diesel engine designed for auxiliary and propulsion use on small to mid-sized sailboats and motorboats. Known for Yanmar legendary durability and fuel efficiency, the 3GMC has become a trusted choice among boat owners worldwide.

Engine Design & Construction

The Yanmar 3GMC features a 3-cylinder, 4-stroke diesel configuration with a robust cast-iron engine block engineered for long service life in marine environments. Its compact footprint allows for easy installation in tight engine compartments, making it ideal for both new builds and repowering projects.

Performance & Power Delivery

Producing smooth and consistent power, the 3GMC delivers excellent low-end torque, ensuring reliable maneuvering, steady cruising, and confident docking performance. The engine is optimized for quiet operation with reduced vibration, enhancing onboard comfort.

Fuel Efficiency & Operation

Equipped with a direct fuel injection system, the Yanmar 3GMC offers outstanding fuel efficiency and clean combustion. Its economical fuel consumption makes it suitable for long-distance cruising while keeping operating costs low.

Cooling & Marine Reliability

The engine utilizes a freshwater cooling system with heat exchanger, protecting internal components from corrosion while maintaining optimal operating temperatures. This design enhances durability and ensures dependable operation in both saltwater and freshwater conditions.

Maintenance & Serviceability

The Yanmar 3GMC is designed for ease of maintenance, with accessible service points for routine inspections and servicing. Backed by Yanmar extensive global service network, spare parts and technical support are widely available.

Applications

The Yanmar 3GMC Marine Diesel Engine is ideal for:

Sailing yachts

Small motorboats

Cruising boats

Auxiliary propulsion systems

Key Advantages

Proven Yanmar marine diesel reliability

Compact and lightweight design

Fuel-efficient direct injection system

Freshwater cooling with heat exchanger

Quiet operation with low vibration

Technical Specifications

General

Model: Yanmar 3GMC
Engine Type: 4-stroke marine diesel engine
Aspiration: Naturally aspirated
Fuel System: Direct injection
Number of Cylinders: 3 inline

Displacement & Combustion

Displacement: Approx. 0.91 liters
Bore × Stroke: 76 mm × 82 mm
Compression Ratio: Approx. 21.3 : 1
Combustion System: Direct injection diesel

Performance

Rated Power Output: Approx. 20 HP (14.7 kW) @ 3,600 RPM
Maximum Torque: Approx. 54 Nm @ 2,400 RPM
Rated Engine Speed: 3,600 RPM
Duty Rating: Marine auxiliary / light propulsion

Cooling & Lubrication

Cooling System: Freshwater cooling with heat exchanger
Lubrication System: Forced lubrication system
Engine Oil Capacity: Approx. 2.6 liters

Electrical System

Starting System: Electric start
Electrical Output: 12 V
Alternator: 35 A marine alternator

Dimensions & Weight

Dry Weight: Approx. 110–115 kg
Overall Dimensions (L × W × H): Approx. 650 × 470 × 550 mm

Air & Exhaust

Air Intake: Naturally aspirated
Exhaust System: Marine wet exhaust compatible

Fuel Consumption

Fuel Consumption: Approx. 2.0–2.2 liters/hour at cruising speed

Installation & Drive

Rotation: Standard marine rotation
Drive Type: Inboard marine propulsion
Transmission Compatibility: Mechanical marine gearbox
Mounting: Flexible marine engine mounts

Yanmar 3GMC

Yanmar 3GMC Marine Diesel Engine Sale