Volvo Penta D4-300: Advanced 300hp Marine Diesel Performance
Exceptional power, efficiency and smooth operation for modern yachts and commercial vessels
Introduction
The Volvo Penta D4-300 300hp marine diesel engine represents the pinnacle of modern marine propulsion technology. This advanced engine combines robust power delivery with outstanding fuel efficiency, making it an ideal choice for yacht owners and commercial operators who demand both performance and economy. At Wave Inboard Motors, our certified technicians have extensive experience with Marine Engine Installation Services for the D4-300, ensuring optimal performance and reliability for your vessel.
Engineered for vessels ranging from 35 to 50 feet, the D4-300 delivers exceptional torque across the entire power band. Its sophisticated common rail fuel injection system and advanced turbocharging provide immediate throttle response while maintaining remarkable fuel economy. Whether you’re considering a new installation or Marine Engine Repowering Solutions, the D4-300 offers a perfect balance of power and efficiency.
Technical Specifications Table
| Specification | Details |
|---|---|
| Engine Model | Volvo Penta D4-300 |
| Engine Type | 4-cylinder, turbocharged diesel |
| Displacement | 3.7 liters |
| Max Power | 300 hp @ 3500 rpm |
| Max Torque | 590 lb-ft @ 2000-2500 rpm |
| Fuel System | Common rail direct injection |
| Cooling System | Freshwater heat exchanger |
| Weight | 946 lbs (429 kg) |
| Dimensions (LxWxH) | 45.3″ x 29.3″ x 32.3″ |
| Gear Ratio | 1.97:1 |
Competitor Comparison Table
| Feature | Volvo Penta D4-300 | Yanmar 6LY3-ETP | Cummins QSB6.7 |
|---|---|---|---|
| Power Output | 300 hp | 300 hp | 300 hp |
| Torque | 590 lb-ft | 575 lb-ft | 580 lb-ft |
| Weight | 946 lbs | 1285 lbs | 1190 lbs |
| Fuel System | Common Rail | Electronic Injection | Common Rail |
| Noise Level | Low | Moderate | Moderate |
| Service Intervals | 500 hours | 500 hours | 500 hours |
Verdict: The Volvo Penta D4-300 stands out with its superior power-to-weight ratio and advanced electronic integration, making it an excellent choice for modern marine applications where space and efficiency are paramount.
Replacement Options Table
| Option | Overhaul Existing Engine | Install D4-300 | Alternative New Engine |
|---|---|---|---|
| Cost | $15,000-25,000 | $45,000-55,000 | $40,000-60,000 |
| Warranty | 1 year limited | 5 years comprehensive | 3-5 years |
| Performance | Original specs | 30% improvement | 20-25% improvement |
| Fuel Efficiency | Original | 40% better | 30-35% better |
| Resale Value | Minimal increase | Significant increase | Moderate increase |
Expert Recommendation: For most vessel owners, the Volvo Penta D4-300 represents the optimal balance of performance, efficiency, and long-term value. Its advanced features and comprehensive warranty provide peace of mind and superior operation.
Pros and Cons Table
| Pros | Cons |
|---|---|
| Excellent fuel efficiency | Higher initial cost |
| Quiet, smooth operation | Requires specialized service |
| Advanced electronic controls | Complex system integration |
| Compact, lightweight design | Premium parts pricing |
| Strong dealer network |
Frequently Asked Questions (FAQ)
Q1: What is the fuel consumption of the Volvo Penta D4-300 at cruising speed?
A: At typical cruising speed (around 2800-3000 RPM), the D4-300 consumes approximately 8-10 gallons per hour. Actual consumption varies based on hull type, load, and sea conditions. Its common rail system ensures optimal efficiency across a wide power range.
Q2: How does the D4-300’s power-to-weight ratio benefit my boat?
A: The D4-300’s lightweight design (under 950 lbs) for its power class means less weight in the stern, which can lead to better boat trim, faster planing, improved fuel economy, and often higher top speeds compared to heavier engines of similar horsepower.
Q3: What is the recommended service interval for the D4-300?
A: Volvo Penta recommends a major service every 500 hours or annually, whichever comes first. This includes oil and filter changes, fuel filter replacement, and overall system checks. Adhering to this Scheduled Marine Diesel Maintenance schedule is crucial for longevity.
Q4: Can the D4-300 be integrated with Volvo Penta’s IPS pod drive system?
A: The D4-300 is primarily designed for traditional inboard shaft applications. For pod drives, Volvo Penta offers the D4-300 in configurations specifically engineered for systems like the IPS400. It’s essential to select the correct engine variant for your propulsion type.
Q5: What kind of warranty comes with a new Volvo Penta D4-300?
A: New engines typically come with a 5-year factory warranty when installed by an authorized dealer. This comprehensive coverage underscores the engine’s reliability and Volvo Penta’s commitment to standing behind their product.
Q6: Is the D4-300 suitable for both saltwater and freshwater use?
A: Yes, the engine is fully marinized for both environments. However, in saltwater, it is critical to maintain the freshwater cooling system and use a proper sacrificial anode system to protect against corrosion.
Q7: What makes the common rail system in the D4-300 superior?
A: The high-pressure common rail fuel system allows for multiple precise injections per combustion cycle. This results in smoother operation, significantly reduced noise, lower emissions, and improved fuel efficiency compared to older mechanical injection systems.
Q8: I have an older engine. What are the main benefits of repowering with a D4-300?
A: The benefits are substantial. You can expect a dramatic reduction in noise and vibration, up to 40% better fuel economy, more reliable starts, significantly lower emissions, and the peace of mind that comes with a new engine and warranty. Our guide Calculating the True Cost of a Marine Repower can help you evaluate the investment.
Q9: What professional support is available for the D4-300’s electronic systems?
A: As an authorized service center, Wave Inboard Motors has the proprietary Volvo Penta Electronic Vessel Control (EVC) diagnostics software and trained technicians to handle all programming, troubleshooting, and integration needs for the D4-300’s advanced electronics.
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