Volvo Penta D4-180 Auxiliary Inboard Marine Diesel Engine

Description

Pumping 180BHP at 2,800 RPM from a 3.7L displacement block, the Volvo Penta D4-180 Auxiliary Engine supplies continuous 140BHP auxiliary power at 2,400 RPM. This 4-Cylinder platform runs hydraulic pumps and primary electrical gensets. Common-rail fuel systems require strict 2-micron pre-filtration, and the cast iron block demands heavy-duty rigging beams during shipboard installation.

Structural cast iron forms the parent bore cylinder block, matched with an integral ladder subframe for crankcase stiffness. A single-piece 16-Valve cast iron head houses dual overhead camshafts. Electrical architecture features a 12V 2-pole isolated ground circuit, a 3.0 kW starter motor, and a 12V 115A alternator. The compact engine envelope measures 36.2in long, 31.6in wide, and 30.6in high, weighing 1,098 lbs dry. Lube oil sump capacity holds 3.30 US gal.

Key Features of Volvo Penta D4-180

Commercial vessel engineers buy Volvo Penta D4-180 auxiliary diesel engines to drive high-capacity hydraulic power packs and generator skids. Fleet technicians select this inline platform for commercial workboat diesel engine repower projects on dredging support craft.

• Common-rail fuel injection sprays fuel charges at high pressure to optimize auxiliary fuel efficiency
• Turbocharger charge air intercooling boosts air density to maintain continuous power under heavy torque
• Tubular freshwater heat exchangers protect engine cooling passages against corrosive raw sea brine
• Electronic Vessel Control monitors engine speed stability during rapid hydraulic pump load spikes
• SAE 4 flywheel housing mounts connect directly to hydraulic PTO pumps or auxiliary generator alternators
• Parent bore cast iron cylinders resist bore distortion during long continuous operating shifts
• Multi-groove serpentine belts provide positive traction for the high-output 12V 115A battery alternator

Dynamometer Auxiliary Bench Load Output

Dynamometer load testing proves continuous 140BHP shaft power at 2,400 RPM with peak 180BHP output at 2,800 RPM. Boost pressure stabilizes at 1.42 bar during heavy generator loading trials. Freshwater cooling circuits maintain block coolant temperatures at 182°F under full thermal loading. Lube oil pressure holds steady at 55 PSI across full operational speeds. Static engine inclination limits allow up to 30° angles for auxiliary bilges. Crankshaft journal runout remains below 0.0005in TIR to protect bearings against deflection fatigue. Exhaust temperatures stay below 1,220°F.

Field Operation Maintenance Service Rules

Electronic throttle actuators govern auxiliary RPM stability with immediate response to hydraulic pump engagements. Do not install this heavy-duty iron engine in weight-sensitive planing hulls or craft lacking secondary 2-micron fuel water separator filtration. Operators must provide clean sea strainer feeds to protect heat exchanger tubes from sand and shell debris.

• Drain engine lube oil and replace spin-on filter cartridges every 200 operating hours
• Inspect raw water pump impellers and check heat exchanger zinc anodes every 150 hours
• Replace the primary 2-micron fuel water separator canister every 250 engine hours

Factory Warranty Shipment Parts List

Volvo Penta provides a 2-Year commercial warranty backed by 3-Year major component structural coverage. The unboxing crate includes the bobtail engine core, SAE 4 flywheel housing, 12V 115A alternator, 3.0 kW starter, four rubber vibration mounts, EVC wiring harness, oil pressure senders, and factory technical documentation.