Westerbeke 44B Four Marine Diesel Engine

The Westerbeke 44B Four Diesel Engine is a robust, high-performance inboard marine diesel engine designed for small to medium-sized vessels requiring reliable auxiliary propulsion. Known for its durability and smooth operation, the 44B Four is part of Westerbeke renowned series of marine engines, widely trusted by sailors, boat owners, and marine professionals.

Engine Design & Construction

The 44B Four features a 4-cylinder, 4-stroke diesel configuration with direct fuel injection, providing consistent torque and reliable power across a wide range of RPM. Built with a heavy-duty engine block and precision-engineered components, it is designed to endure continuous operation in demanding marine environments while maintaining long service life.

Equipped with a freshwater cooling system and heat exchanger, the engine ensures optimal operating temperatures and protection against corrosion, making it ideal for saltwater and coastal applications. Its compact design allows for installation in tight engine compartments without compromising access for maintenance.

Performance & Efficiency

Delivering approximately 44 horsepower, the Westerbeke 44B Four provides smooth and consistent propulsion, making it suitable for cruising, docking, and auxiliary sailboat operations. Its torque characteristics at low and mid-range RPM offer excellent maneuverability, especially for displacement hulls and traditional sailing vessels.

The engine is engineered for fuel efficiency, allowing extended cruising ranges with economical fuel consumption, and providing reliable performance for both recreational and commercial marine use.

Marine Integration

The 44B Four is compatible with marine gearboxes and conventional shaft-drive systems, offering flexible installation options for a variety of hull types. Its balanced four-cylinder design minimizes vibration and noise, enhancing onboard comfort during extended operations.

Ease of Maintenance & Reliability

One of the key strengths of the Westerbeke 44B Four is its service-friendly design. Routine maintenance such as oil changes, filter replacement, and belt inspections is straightforward, reducing downtime and service costs. Westerbeke global reputation ensures strong parts availability and technical support, guaranteeing long-term reliability.

Ideal Applications

The Westerbeke 44B Four Diesel Engine is ideal for:

Sailboats and auxiliary propulsion systems
Small to medium cruising yachts
Coastal and inland waterway vessels
Owners seeking a reliable, fuel-efficient, and durable marine diesel engine

Key Advantages

Proven Westerbeke marine diesel reliability
Compact and durable design for tight engine compartments
Fuel-efficient 4-cylinder direct injection engine
Freshwater cooling with heat exchanger
Smooth operation with low vibration and noise
Easy maintenance and strong parts availability

Technical Specifications

General

Model: Westerbeke 44B Four
Engine Type: 4-stroke, vertical, water-cooled marine diesel
Fuel System: Direct fuel injection
Aspiration: Naturally aspirated
Number of Cylinders: 4 inline

Displacement & Combustion

Displacement: Approx. 2.7 liters
Bore × Stroke: 88.9 mm × 88.9 mm (3.5″ × 3.5″)
Combustion Chamber: Direct injection diesel

Performance

Rated Power: 44 HP (32.8 kW) @ 3,000 RPM
Rated Speed: 3,000 RPM
Maximum Torque: Approx. 125–130 Nm @ 2,000–2,500 RPM
Fuel Consumption: Low, depends on load and propeller match

Cooling & Lubrication

Cooling System: Freshwater cooling with heat exchanger
Lubrication System: Forced lubrication with gear-type oil pump
Engine Oil Capacity: Approx. 7 liters
Recommended Oil Type: Marine-grade diesel engine oil

Electrical System

Starting System: 12 V electric start
Starter Motor Output: Approx. 1.5 kW
Alternator: 12 V marine alternator for onboard electrical systems

Dimensions & Weight

Overall Dimensions (L × W × H): Approx. 900 × 550 × 650 mm
Dry Weight: Approx. 280–300 kg (engine only, excluding gearbox)

Drive & Installation

Rotation (Crankshaft): Counter-clockwise (viewed from flywheel end)
Drive Type: Inboard shaft drive
Compatible Gearbox: Standard marine transmission for small to medium vessels
Mounting: Flexible engine mounts for vibration reduction

Service & Adjustment

Valve Clearance (Cold): Intake: 0.25 mm / Exhaust: 0.25 mm
Firing Order: 1 – 3 – 4 – 2
Maintenance Access: Easy access to filters, belts, and service points

Westerbeke 44B Four

Westerbeke 44B Four Diesel Engine Sale