Volvo Penta D6-400A Aquamatic DPI Sterndrive Engine Package

Description

Compliant with EPA Tier 3 and IMO Tier II marine emissions standards, the Volvo Penta D6-400A Sterndrive Package provides 400BHP at 3,500 RPM for fast tactical craft. Displacing 5.5L across 6 cylinders, this engine yields 300BHP continuous output at 3,100 RPM. Common-rail injection requires 2-micron pre-filtration, and the electro-hydraulic DPI outdrive demands scheduled synthetic clutch oil service.

A parent bore ductile cast iron block combines with a reinforced bedplate subframe to withstand intense torque spikes. The single-piece 24-Valve cast iron cylinder head contains dual overhead camshafts with crossflow porting. Electrical circuits run on an isolated 12V 2-pole system equipped with a 3.0 kW starter and a 12V 115A alternator. Package stance spans 45.3in long, 32.4in wide, and 30.7in high. Complete package dry weight equals 1,709 lbs. Oil sump capacity holds 5.28 US gal.

Key Features of Volvo Penta D6-400A

Tactical boatbuilders buy Volvo Penta D6-400A sterndrive packages to achieve maximum top speed with smooth electro-hydraulic gear shifting. Naval yards choose this system for commercial workboat diesel engine repower installations in offshore patrol interceptors.

• Mechanical superchargers deliver immediate boost from idle to eliminate hole-shot turbo lag
• Direct common-rail injection operates at 2,000 bar to optimize combustion pressure and emissions
• Aquamatic DPI sterndrives employ hydraulic clutch packs to eliminate mechanical shift clunk and drive rattle
• DuoProp counter-rotating propellers grip water to provide true tracking and powerful reverse thrust
• Electronic Vessel Control synchronizes electronic steering and throttle inputs across CAN-bus datalinks
• Cast iron ladder subframes hold crankshaft bearings rigid under heavy high-RPM combustion loads
• Heavy-duty serpentine belt systems maintain steady drive grip on the 12V 115A alternator

Dynamometer Limits Thermal Bench Output

Dynamometer test records confirm 400BHP peak output at 3,500 RPM and 300BHP continuous power at 3,100 RPM. Supercharger and turbo compounding produces 2.05 bar peak intake boost pressure. Freshwater heat exchangers hold core coolant temperatures at 185°F under continuous maximum power dyno pulls. Engine oil pressure maintains 55 PSI across full operational revolutions. Sterndrive trim permits up to 30° static trailering angles. Crankshaft journal runout remains below 0.0005in TIR to protect bearings against deflection fatigue. Exhaust gas temperatures stay below 1,280°F.

Field Operation Maintenance Service Rules

Integrated electronic steering and throttle controls provide responsive helm action with under 2 lbs of lever resistance. Do not install this 3,500 RPM high-output sterndrive package in heavy slow-speed displacement push-boats or vessels operating in shallow mud shallows that clog raw-water intakes. Operators must use clean ultra-low sulfur fuel and maintain sterndrive drive bellows regularly.

• Drain engine oil and change spin-on oil filter cartridges every 200 service hours
• Inspect DPI sterndrive gear oil, drive bellows, and sacrificial zinc anodes every 100 hours
• Replace the primary 2-micron fuel water separator filter cartridge every 250 engine hours

Factory Warranty Shipment Parts Manifest

Volvo Penta provides a 2-Year limited warranty backed by 3-Year major component structural coverage. The shipment crate contains the diesel engine assembly, Aquamatic DPI sterndrive unit, transom shield kit, 12V 115A alternator, 3.0 kW starter, electronic steering helm pump, EVC harness, and factory technical manuals.