Yanmar 3JH2CE Marine Diesel Engine

The Yanmar 3JH2CE Marine Engine is a compact and reliable 4-stroke marine diesel engine engineered to deliver dependable propulsion for sailboats and small to medium-size power vessels. Built on Yanmar proven marine diesel technology, the 3JH2CE is widely recognized for its durability, fuel efficiency, and smooth operational performance in demanding marine environments.

Engine Design & Construction

The 3JH2CE features a three-cylinder, inline diesel configuration with direct fuel injection, providing strong low-end torque and consistent power output across the operating range. Its freshwater cooling system with heat exchanger ensures stable engine temperatures and long-term reliability, even in saltwater conditions. The engine block and major components are constructed from high-quality materials to resist corrosion and wear, making it suitable for long-term marine use.

Performance & Output

Rated at approximately 38 horsepower at 3,600 RPM, the Yanmar 3JH2CE delivers balanced performance for cruising, maneuvering, and auxiliary propulsion. The engine’s torque characteristics support smooth acceleration and steady cruising speeds, while maintaining economical fuel consumption. This makes it ideal for vessels that require dependable power without excessive operating costs.

Marine Compatibility

Designed specifically for marine propulsion, the 3JH2CE is compatible with marine gearboxes and shaft drive systems, allowing flexible installation across a wide range of vessel types. Its compact size and efficient layout enable installation in confined engine rooms while still allowing access for routine inspection and servicing.

Operational Efficiency

The direct injection system enhances combustion efficiency, contributing to reduced fuel consumption and reliable cold starting. A 12-volt electric starting system and onboard charging capability support modern onboard electrical needs, making the engine suitable for extended cruising and auxiliary power demands.

Maintenance & Reliability

Ease of maintenance is a key advantage of the Yanmar 3JH2CE. Service points such as filters, belts, and pumps are positioned for accessibility, reducing downtime and simplifying routine maintenance. Thanks to Yanmar’s long-standing reputation and global presence, spare parts availability remains strong, supporting long service life and consistent performance.

Ideal Applications

The Yanmar 3JH2CE is well-suited for:

Sailboats and cruising yachts
Auxiliary propulsion systems
Small to medium displacement vessels
Coastal and offshore recreational use

Key Advantages

Proven Yanmar marine diesel reliability
Compact and space-efficient design
Fuel-efficient 3-cylinder direct injection engine
Smooth operation with dependable torque output
Designed for long service life in marine environments

Technical Specifications

General

Model: Yanmar 3JH2CE
Engine Type: 4-stroke, vertical, water-cooled marine diesel
Fuel System: Direct injection
Aspiration: Naturally aspirated
Number of Cylinders: 3 (inline)
Displacement: 1,363 cc (1.36 L)
Bore × Stroke: 82 mm × 86 mm
Combustion Chamber: Direct injection diesel

Performance

Maximum Output: 38 HP (28.5 kW) @ 3,600 RPM
Continuous Output: 35 HP (25.7 kW) @ 3,400 RPM
Maximum Torque: Approx. 78 Nm @ 3,000 RPM
Rated Speed: 3,600 RPM
Fuel Consumption: Approx. 200 g/HP/hr (at rated output)

Cooling & Lubrication

Cooling System: Freshwater cooling with heat exchanger
Lubrication System: Forced lubrication with trochoid oil pump
Engine Oil Capacity: Approx. 4.9 liters
Lubrication Oil Pressure: 3.5 – 4.5 kgf/cm² (at rated speed)

Electrical System

Starting System: 12 V electric starter
Starter Motor Output: Approx. 1.4 kW
Alternator Output: 12 V / 55 A
Charging System: Belt-driven alternator

Dimensions & Weight

Overall Dimensions (L × W × H):
Approx. 782 × 511 × 587 mm
Dry Weight: Approx. 165 kg (engine only, without gearbox)

Drive & Installation

Rotation (Crankshaft): Counter-clockwise (viewed from flywheel)
Mounting Flange: SAE #5
Compatible Gearbox: Marine constant-mesh gearbox (commonly KBW series)
Propeller Shaft Rotation: Clockwise (viewed from stern)

Service & Adjustment

Valve Clearance (Cold):
- Intake: 0.20 mm
- Exhaust: 0.20 mm
Fuel Injection Timing: Approx. 14° BTDC
Injection Pressure: Approx. 200 kg/cm²
Firing Order: 1 – 3 – 2

Yanmar 3JH2CE

Yanmar 3JH2CE Marine Engine Sale