Volvo Penta D4-300 Marine Diesel Engine – 300 HP | JB Marine GmbH Germany

Power. Precision. Performance.
The Volvo Penta D4-300 Marine Diesel Engine delivers 300 horsepower (221 kW) of reliable propulsion in a compact 4-cylinder, 3.7-liter package engineered for outstanding acceleration, fuel economy, and durability.

Built for both recreational and commercial vessels, the D4-300 combines common-rail fuel injection, double overhead camshafts, and Electronic Vessel Control (EVC) technology to achieve smooth, quiet, and responsive power under all marine conditions.

As an authorized Volvo Penta dealer in Germany, JB Marine GmbH provides factory-certified sales, installation, and worldwide shipping, ensuring every customer receives genuine Volvo Penta quality and support.

Exceptional Performance & Instant Response

The Volvo Penta D4-300 is designed to deliver high torque at low RPM, giving boat owners the advantage of quick acceleration, steady cruising, and effortless docking.
It’s the ideal propulsion system for pleasure craft, fishing vessels, and professional workboats requiring power, reliability, and low operating costs.

Performance Highlights:

• 300 HP (221 kW) @ 3500 RPM

• Common-rail fuel injection for efficient combustion

• Turbocharging with a charge-air cooler for maximum power density

• Smooth torque curve for continuous thrust across the RPM range

• Low vibration & noise with balanced shaft and optimized suspension

Every component of the D4-300 is designed to deliver steady propulsion with reduced emissions and exceptional efficiency.

Compact, Robust & Lightweight Design

The Volvo Penta D4-300 features a rigid cast-iron cylinder block and head, ensuring strength and long-term reliability, while maintaining a compact footprint that simplifies installation.

Design Advantages:

• 4-cylinder inline configuration for balanced performance

• Compact 3.7L displacement saves engine room space

• Lightweight construction improves vessel balance

• Heavy-duty marine-grade materials for corrosion resistance

This combination of strength, simplicity, and efficiency makes the D4-300 one of the most versatile and serviceable marine engines in its class.

Unique Marine Torque for Superior Thrust

The D4-300 provides Volvo Penta’s signature marine torque curve, ensuring instant acceleration and reliable cruising performance — even in rough conditions or under heavy load.

Marine Torque Benefits:

• Quick response and efficient docking maneuverability

• High load-carrying capacity for towing and workboats

• Steady cruising speed regardless of vessel load

• Enhanced control and reduced operator fatigue

With its broad torque range, this engine guarantees smooth power delivery and precise vessel handling in all situations.

Fuel Efficiency & Environmental Compliance

Volvo Penta’s intelligent common-rail injection system and engine management ECU optimize fuel delivery for minimal consumption and emissions.

Eco Efficiency Features:

• Fuel consumption: ≈ 221 g/kWh

• Advanced ECU monitoring for adaptive performance

• Reduced fuel burn per nautical mile

• Compliance with IMO NOx Tier II, EU RCD Stage II, and EPA Tier 3 standards

Experience more power, less fuel use, and full compliance with international emission regulations — making the D4-300 a smart, eco-responsible choice.

Electronic Vessel Control (EVC) System

The Volvo Penta Electronic Vessel Control (EVC) system provides seamless integration of engine, electronics, and onboard controls, ensuring maximum reliability and simplicity for the operator.

EVC System Highlights:

• Real-time data monitoring for optimal engine performance

• Single-Lever Control for smooth throttle synchronization

• Cruise Control for improved efficiency and comfort

• Glass Cockpit Display for system visibility

• Optional Joystick Docking for precise maneuverability

EVC allows your D4-300 to communicate with every part of your vessel, ensuring smart power management and intuitive control.

Freshwater Cooling & Long-Term Protection

The closed-loop freshwater cooling system maintains stable operating temperatures and prevents internal corrosion — extending the engine’s service life and reliability.

Cooling System Advantages:

• Consistent heat exchange for optimal efficiency

• Anti-corrosion protection for internal components

• Reduced maintenance in saltwater conditions

• Engine longevity even under continuous load

The D4-300’s cooling system guarantees durable, worry-free performance for years of marine operation.

Easy Maintenance & Long Service Life

Engineered for low operating costs, the Volvo Penta D4-300 offers easy access to service points and uses genuine Volvo Penta components for superior reliability.

Maintenance Highlights:

• Accessible filters, dipsticks, and drain points

• Long service intervals to reduce downtime

• Compatible with OEM Volvo Penta lubricants and parts

• Optional pre-filters and accessories for optimal protection

With JB Marine GmbH’s certified technicians, maintenance and servicing are quick, convenient, and professional.

Technical Specifications – Volvo Penta D4-300

Warranty & After-Sales Support

Every Volvo Penta D4-300 sold by JB Marine GmbH comes with a 2-year factory warranty, extendable up to 5 years for additional coverage.

Warranty Coverage:

• Protection against manufacturing and material defects

• Valid for both recreational and commercial use

• Backed by the Volvo Penta global service network

• Optional extended protection plans are available

Your investment is backed by official Volvo Penta support and certified service worldwide.

 Frequently Asked Questions (FAQs)

What boats is the Volvo Penta D4-300 suitable for?

The D4-300 is ideal for sport boats, leisure yachts, commercial workboats, and other vessels that require high torque, a compact design, and reliable efficiency.

How does it compare to Volvo Penta 6-cylinder engines?

The D4-300 offers lighter weight and lower fuel consumption, while 6-cylinder engines like the D6-370 or D6-435 deliver higher power for larger vessels.

Where can I find genuine Volvo Penta parts?

JB Marine GmbH supplies authentic Volvo Penta filters, injectors, alternators, and control units for all D-series engines.

Can I install the D4-300 on my vessel?

Yes — the D4-300 is compatible with various propulsion systems. JB Marine GmbH provides professional installation consultation and support.

Do you ship internationally?

Absolutely. We offer fast, insured worldwide shipping for all Volvo Penta marine engines and accessories.

Why Choose JB Marine GmbH?

• Authorized Volvo Penta Dealer in Germany

• Certified Technicians & Factory Support

• Competitive OEM Pricing & Financing Options

• Worldwide Shipping & Logistics Assistance

• Expert Consultation for Engine Selection & Repowering

At JB Marine GmbH, we combine technical excellence, customer trust, and genuine Volvo Penta parts to deliver top-quality propulsion solutions across Europe and beyond.

Order Your Volvo Penta D4-300 Marine Diesel Engine Today

Upgrade your vessel with the Volvo Penta D4-300 Marine Diesel Engine, the perfect balance of power, efficiency, and long-term reliability.