Volvo Penta D11-625 Inboard Shaft Marine Propulsion Engine

Description

Experience massive commercial thrust across open offshore sea tracks with the Volvo Penta D11-625 Marine Propulsion Engine. This 6-Cylinder 10.8L heavy-duty diesel outputs 450BHP continuous power at 2,000 RPM and 625BHP intermittent power at 2,400 RPM. Rigging crews must support a dry mass of 2,524 lbs and maintain strict fuel cleanliness standards for electronic unit injectors.

Heavy industrial iron casting forms the block, equipped with replaceable wet cylinder liners and a monobloc 24-Valve cylinder head with an overhead camshaft. The 24V isolated ground electrical system runs a 5.5 kW starter motor and an 80A marine alternator. Dry weight totals 2,524 lbs without reduction gear. Physical chassis envelope dimensions measure 58.6in long by 37.2in wide and 40.5in high, with a lube oil sump holding 9.51 US gal.

Key Features of Volvo Penta D11-625

Offshore crew supply boat operators buy Volvo Penta D11-625 marine propulsion engines to secure sustained cruising speeds under heavy ocean displacement. The package streamlines commercial workboat diesel engine repower installations through standardized SAE 1 flywheel housing dimensions.

• Electronic Unit Injectors with EMS 2 digital engine management provide high injection pressure and balanced cylinder fueling.
• Twin-entry turbocharger with electronic wastegate supplies high low-end boost without excessive exhaust backpressure.
• Seawater charge air aftercooler suppresses intake air temperatures to maximize continuous combustion efficiency.
• Replaceable wet sleeve cylinder liners permit complete in-frame engine overhauls without removing engine mounts.
• Monobloc 24-Valve cylinder head with overhead camshaft optimizes air charge flow and fuel spray geometry.
• SAE 1 flywheel housing mates with ZF 325A and Twin Disc commercial transmissions.
• Isolated ground 24V marine electrical system prevents hull electrolysis on commercial steel hulls.

Dynamometer Performance Bench Load Data

Dynamometer load cell certification confirms 450BHP continuous power at 2,000 RPM and 1,365 ft-lbs of shaft torque, reaching 625BHP at 2,400 RPM. Twin-entry turbochargers generate 2.40 bar boost pressure under maximum continuous loading. Exhaust pyrometer temperatures stabilize below 1,020°F ahead of the water mixer elbow. Closed-circuit freshwater loops equilibrate at 185°F across high-speed runs. Main bearing lube oil pressure maintains 65 PSI at cruise speed, while crankshaft journal runout measures within 0.0004in TIR across all seven main bearing journals.

Field Usability Protocols Installation Boundaries

Electronic Vessel Control systems eliminate mechanical throttle cable resistance, requiring zero hand effort to advance digital levers. This high-output commercial engine is not built for slow displacement canal barges, unballasted skiffs, or vessels lacking forced engine bay air induction. Never select this commercial workboat diesel engine repower for craft with hull structures unable to absorb 1,365 ft-lbs of continuous torque or vessels without multi-stage 2-micron fuel water separators.

• Drain crankcase engine oil and replace dual spin-on lube filters every 500 operating hours.
• Service the raw water pump impeller and inspect heat exchanger zincs every 12 months.
• Inspect valve lash settings and reset cold clearance every 1,000 run hours.

Factory Warranty Marine Crate Manifest

Volvo Penta backs this commercial propulsion engine with a 2-Year limited commercial marine warranty. The factory export crate contains the bobtail diesel engine, 24V 5.5 kW starter, 80A alternator, flexible engine mounts, EVC digital control wiring harness, oil pressure sensor, coolant temperature sender, and factory workshop manuals.