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Volvo Penta D6-370 – Aquamatic Sterndrive 370 HP
Volvo Penta D6-370 – 370 HP Aquamatic features a high-performance 5.5L inline-six propulsion system paired with the DPH Duoprop™ sterndrive for elite maneuverability. The 370 HP unit utilizes a supercharger and turbocharger to provide massive torque for the twin counter-rotating propellers, ensuring superior grip, tracking, and rapid acceleration for performance sportfishers and express cruisers.
- Transom/Engine Integration Specification: Sterndrive Configuration (DPH Drive).
- Internal Engine Configuration Type: Inline 6-Cylinder 5.5L Supercharged/Turbocharged.
- Advanced Fuel Delivery System: Common Rail with Digital EVC Steering compatibility.
- Recommended Vessel Application Use: Ideal for express cruisers and high-performance sportboats.
- Factory Protection Service Plan: Volvo Penta international service support.
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Description
Volvo Penta D6-370 370 HP – Aquamatic Sterndrive Performance
Solving the performance limitations of traditional shaft drives in mid-sized cruisers, the Volvo Penta D6-370 Aquamatic Sterndrive package offers unmatched efficiency and steerable thrust. Delivering 370 HP at 3500 RPM, this V6-derived 6-cylinder diesel utilizes the DPH duplex drive to maximize grip in the water, resulting in faster planing times and superior top-end speeds for American recreational boaters. The dual-counter-rotating propellers ensure neutral steering torque and precision tracking in windy USA marinas.
Built to comply with USA EPA Tier 3 emission mandates, the D6-370 utilizes common-rail technology to ensure a smoke-free transom and reduced environmental impact. The package is fully integrated with Volvo Penta’s Powertrim Assistant, which automatically optimizes the drive angle for the best fuel economy and ride comfort in choppy coastal conditions. For the American owner, this sterndrive system combines the serviceability of a diesel inboard with the agile handling of a high-performance outboard.
Core Technical Specifications
- Maximum Output: 370 HP at 3500 RPM.
- Drive System: Aquamatic DPH Duoprop sterndrive.
- Displacement: 336 cubic inches (5.5 Liters).
- Configuration: In-line 6-cylinder, 4-stroke diesel.
- Aspiration: Turbocharged, supercharged, and aftercooled.
- Dry Weight: Approximately 1700 lbs including drive.
- Electrical: 12V / 115A marine alternator.
- Compliance: EPA Tier 3 and RCD2 certified.
Volvo Penta D6-370 Full Specs
| Engine type | In-line 6-cylinder, 4-stroke diesel |
| Displacement | 5.5L (336 cid) |
| Bore x stroke | 103 x 110 mm |
| Horsepower | 370 hp (272 kW) |
| Rated rpm | 3500 rpm |
| Aspiration | Turbo, Supercharger, Aftercooled |
| Compression ratio | 17.5:1 |
| Fuel system | Common Rail Fuel Injection |
| Recommended fuel | Diesel (EN 590 / ASTM D975) |
| Ignition/Firing Order | Compression / 1-5-3-6-2-4 |
| Alternator | 115 Amp |
| Gear ratio/Drive | DPH Aquamatic Sterndrive |
| Transmission | Integrated with Sterndrive |
| Dry weight | 770 kg (1698 lbs) with Drive |
| Flywheel housing | SAE 3 |
| Steering | Electronic Power Steering |
| Coolant capacity | 16L |
| Exhaust system | Through-drive exhaust |
| Cooling system | Fresh water cooled (Closed) |
| Lubrication | Pressure feed (Wet Sump) |
| Oil capacity | 20L |
| Emissions rating | EPA Tier 3, IMO II, EU RCD II |
Volvo Penta D6-370 Service & Performance Guide
What is the fuel consumption of the Volvo Penta D6-370?
The D6-370 consumes approximately 18.2 gallons per hour at a maximum rated speed of 3,500 RPM. Designed for Aquamatic sterndrives, the common-rail V6 block provides immediate torque for rapid planing of sport cruisers. Optimal cruising efficiency is generally achieved between 2,600 and 3,000 RPM depending on the drive gear ratio.
What oil grade is required for the Volvo Penta D6-370?
This model requires 21.1 quarts of Volvo VDS-4.5 specialized engine oil for the engine block. Note that the Aquamatic sterndrive unit requires its own specific synthetic gear lubricant, such as Volvo Penta 75W-90. Perform engine oil changes every 200 hours and sterndrive gear oil changes every season or 200 hours.
How does the Volvo Penta D6-370 cooling system operate?
The engine uses a freshwater cooling loop with a seawater-cooled heat exchanger, specifically adapted for sterndrive water pickups. Seawater is drawn through the drive unit or hull pickup to cool the engine, oil, and intake air through the aftercooler. Regularly inspect the drive bellows and water hoses for signs of fatigue or marine growth.
What are the electrical system specifications for this engine?
The D6-370 features a 12V-115A alternator as standard to power the EVC system and the sterndrive's hydraulic trim pump. This system allows for precise digital control of the drive angle to optimize hull trim during acceleration. Maintain the battery at a minimum 12.6V to ensure the electronic shift actuators function correctly.
What are the physical dimensions and weight of the D6-370?
The engine weight is 1,279 lbs without the drive unit, with an overall length of 47.2 inches. Because the weight is concentrated at the transom, ensure the hull's structural integrity is rated for this engine-drive combination. Allow sufficient room behind the engine for the sterndrive steering and trim hose connections.
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