Volvo Penta AQAD41A Engine

The Volvo Penta AQAD41A is a powerful and durable marine diesel engine engineered for high performance in demanding marine applications. Known for its robustness and reliability, this engine is widely used in sport boats, cruisers, and light commercial vessels where strong acceleration, efficient cruising, and long-term dependability are essential.

Engine Design & Construction

The AQAD41A features a 6-cylinder, inline, 4-stroke diesel configuration with turbocharging and aftercooling, delivering impressive power while maintaining controlled fuel consumption. Built with a heavy-duty cast-iron engine block and precision-machined internal components, the engine is designed to handle continuous operation under high loads.

Its advanced marine adaptation includes corrosion-resistant materials and systems optimized for saltwater environments, ensuring durability and extended service life.

Performance & Power Delivery

Delivering high horsepower and strong torque output, the Volvo Penta AQAD41A provides excellent throttle response and smooth power delivery across the RPM range. The turbocharged design enhances acceleration and maintains consistent performance even under heavy loads, making it ideal for planing hulls and fast cruisers.

The engine’s balanced 6-cylinder layout reduces vibration and noise, improving onboard comfort during high-speed cruising and long-distance operation.

Cooling & Efficiency

Equipped with a freshwater cooling system and heat exchanger, the AQAD41A maintains stable operating temperatures while protecting internal components from corrosion. Efficient combustion and optimized airflow contribute to improved fuel efficiency relative to its power output.

Marine Integration & Versatility

The Volvo Penta AQAD41A is compatible with Volvo Penta marine transmissions and sterndrive systems, making it suitable for both repower projects and new installations. Its versatile configuration supports a wide range of marine propulsion setups.

Maintenance & Reliability

Designed for ease of service, the AQAD41A offers accessible maintenance points and a straightforward mechanical layout. Backed by Volvo Penta’s global service network, the engine benefits from strong parts availability and technical support worldwide.

Ideal Applications

The Volvo Penta AQAD41A Engine is ideal for:

• Sport boats and performance cruisers

• Offshore and coastal cruising vessels

• Light commercial and utility boats

• Repower and high-performance marine applications

Key Advantages

• Proven Volvo Penta marine diesel reliability

• Turbocharged and aftercooled for high power output

• Smooth 6-cylinder operation with reduced vibration

• Freshwater cooling for enhanced durability

• Strong torque and excellent acceleration

• Global service and parts support

Technical Specifications

General

• Model: Volvo Penta AQAD41A

• Engine Type: 4-stroke, water-cooled marine diesel

• Fuel System: Direct mechanical fuel injection

• Aspiration: Turbocharged & aftercooled

• Number of Cylinders: 6 inline

Displacement & Combustion

• Displacement: Approx. 3.6 liters

• Bore × Stroke: Approx. 96 mm × 83 mm

• Combustion System: Direct injection diesel

Performance

• Maximum Power Output: Approx. 200 HP @ 3,800 RPM

• Rated Speed: Approx. 3,800 RPM

• Torque Characteristics: High torque across mid and high RPM ranges

• Fuel Consumption: Optimized for power-to-weight efficiency (varies by load and drive setup)

Cooling & Lubrication

• Cooling System: Freshwater cooling with heat exchanger

• Lubrication System: Forced lubrication with oil cooler

• Engine Oil Capacity: Approx. 9.0 liters

• Recommended Oil Type: Marine-grade diesel engine oil

Electrical System

• Starting System: 12 V electric start

• Alternator: 12 V marine alternator

Dimensions & Weight

• Overall Dimensions (L × W × H): Approx. 980 × 670 × 780 mm

• Dry Weight: Approx. 520–550 kg (engine only, excluding drive system)

Drive & Installation

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

• Drive Type: Sterndrive or inboard (Volvo Penta compatible)

• Compatible Drives: Volvo Penta AQ series sterndrives

• Mounting: Heavy-duty marine engine mounts

Service & Adjustment

• Valve Clearance (Cold): Intake: 0.30 mm / Exhaust: 0.35 mm

• Firing Order: 1 – 5 – 3 – 6 – 2 – 4

• Maintenance Access: Designed for easy access to filters, belts, and service points