Volvo Penta D2-55 Marine Diesel Engine

The Volvo Penta D2-55 is a reliable, compact, and fuel-efficient inboard marine diesel engine delivering 55 HP, designed for sailboats, small yachts, and auxiliary propulsion applications. Known for its robust construction, smooth operation, and low emissions, the D2-55 is part of Volvo Penta’s renowned D2 series, trusted by boat owners and marine professionals worldwide.

Engine Design & Construction

The D2-55 features a 4-cylinder, 4-stroke diesel configuration with common-rail fuel injection, providing consistent power, strong low-end torque, and smooth performance across the operating range. Its durable engine block and high-quality components are engineered to withstand continuous operation in harsh marine environments, ensuring long service life.

Equipped with a freshwater cooling system with heat exchanger, the engine maintains optimal operating temperatures while protecting internal components from corrosion. Its compact and lightweight design allows easy installation in limited engine compartments while maintaining accessibility for routine maintenance.

Performance & Efficiency

Delivering 55 HP at 3,200 RPM, the Volvo Penta D2-55 provides smooth and reliable propulsion for cruising, docking, and maneuvering operations. Optimized torque characteristics at low and mid-range RPM make it ideal for displacement hulls and sailboats that require consistent thrust and precise control.

The engine’s advanced fuel injection system ensures high fuel efficiency and low emissions, making it an environmentally friendly and economical choice for extended cruising and daily marine use.

Marine Integration

Designed for marine applications, the D2-55 is compatible with Volvo Penta marine gearboxes and conventional shaft-drive systems, offering flexibility in installation. Its balanced 4-cylinder design minimizes vibration and noise, enhancing onboard comfort.

Ease of Maintenance & Reliability

The D2-55 is renowned for its service-friendly design, with easy access to oil filters, fuel filters, and belts. Routine maintenance is straightforward, reducing downtime and service costs. Volvo Penta global support network ensures wide availability of spare parts and technical assistance, guaranteeing long-term reliability.

Ideal Applications

The Volvo Penta D2-55 Diesel Engine is ideal for:

• Sailboats and auxiliary propulsion systems

• Small to medium cruising yachts

• Coastal and inland waterway vessels

• Owners seeking a compact, reliable, and fuel-efficient marine diesel engine

Key Advantages

• Proven Volvo Penta marine diesel reliability

• Compact and space-efficient design

• Fuel-efficient 4-cylinder diesel with common-rail injection

• Freshwater cooling with heat exchanger

• Smooth operation with low vibration and noise

• Easy maintenance and strong global parts support

Technical Specifications

General

• Model: Volvo Penta D2-55

• Engine Type: 4-cylinder, 4-stroke, inboard marine diesel

• Fuel System: Common-rail direct injection

• Aspiration: Naturally aspirated

• Number of Cylinders: 4 inline

Displacement & Combustion

• Displacement: 2.2 liters

• Bore × Stroke: 87 mm × 94 mm

• Combustion Chamber: Common-rail diesel injection

Performance

• Rated Power: 55 HP (41 kW) @ 3,200 RPM

• Rated Speed: 3,200 RPM

• Maximum Torque: Approx. 150 Nm @ 2,000–2,500 RPM

• Fuel Consumption: Low, dependent 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. 6 liters

• Recommended Oil Type: Marine-grade diesel engine oil

Electrical System

• Starting System: 12 V electric start

• Starter Motor Output: Approx. 1.7 kW

• Alternator: 12 V marine alternator for onboard electrical systems

Dimensions & Weight

• Overall Dimensions (L × W × H): Approx. 950 × 520 × 620 mm

• Dry Weight: Approx. 260–280 kg (engine only, excluding gearbox)

Drive & Installation

• Rotation (Crankshaft): Counter-clockwise (viewed from flywheel end)

• Drive Type: Inboard shaft drive

• Compatible Gearbox: Volvo Penta marine gearbox or conventional shaft drive

• Mounting: Flexible engine mounts

Service & Adjustment

• Valve Clearance (Cold): Intake: 0.20 mm / Exhaust: 0.25 mm

• Firing Order: 1 – 3 – 4 – 2

• Maintenance Access: Easy access to filters, belts, and service points