Yanmar 8LV-370 Inboard Shaft Marine Diesel Engine

Description

Running offshore tournament convertibles into steep inlet breakers requires explosive throttle punch to maintain helm control. The Yanmar 8LV-370 Inboard Diesel Engine provides that surge with a 4.460L twin-turbocharged V8 producing 370 BHP at 3,800 RPM. Common-rail direct injection requires 2-micron pre-filtration, and aluminum cylinder heads demand closed-cooling anti-freeze protection to stop raw water galvanic damage.

A parent bore cast iron block pairs with aluminum alloy 4-valve cylinder heads to balance structural strength and total weight. Dual overhead camshafts actuate 32 valves driven by a steel timing chain. Electrical systems run on an isolated 12V marine ground with CAN-bus VC10 integration, a 3.0 kW starter, and a high-output 12V 180A alternator. Dimensions span 36.0in long, 32.3in wide, and 30.7in high, weighing 1,069 lbs. Oil pan capacity holds 2.64 US gal.

Key Features of Yanmar 8LV-370

Sportfishing yacht owners buy Yanmar 8LV-370 inboard shaft marine diesel engines to equip 32ft to 48ft express sport-fishers with high-speed V8 propulsion. Marine yards choose this package for commercial workboat diesel engine repower hulls in fast passenger launches.

• Twin turbochargers with water-cooled intercoolers force dense charge air into cylinders for instant torque
• Piezoelectric common-rail fuel injection operates up to 2,000 bar to eliminate soot on gelcoat transoms
• High-output 12V 180A marine alternators replenish large deep-cycle house battery banks during harbor transits
• Closed freshwater cooling loops protect aluminum heads and cast iron water jackets from ocean brine
• CAN-bus VC10 electronic vessel controls provide smooth fly-by-wire throttle and transmission shifting
• SAE 4 flywheel housings connect directly to Yanmar KM4A2, ZF 63A, or ZF 63IV down-angle gearboxes
• Compact 90° V8 engine stance fits into low-profile engine compartments beneath cockpit decks

Bench Dynamometer Load Test Output

Dynamometer test records confirm 370 BHP peak output at 3,800 RPM and 315 BHP continuous output at 3,600 RPM. Twin turbo boost pressure stabilizes at 1.90 bar during continuous full-power runs. Freshwater cooling circuits hold engine core temperatures steady at 180°F under sustained maximum power dyno pulls. Engine oil pressure maintains 55 PSI across operational engine speeds. Shaftline installation permits up to 15° static inclination angles. Crankshaft journal runout remains below 0.0004in TIR to protect bearings against deflection fatigue. Exhaust temperatures stay below 1,220°F during full power runs.

Field Operation Maintenance Service Rules

Electronic CAN-bus helm controls provide light lever action with under 2 lbs of hand resistance. Do not install this 3,800 RPM V8 engine in heavy slow-speed displacement push-boats or vessels operating in shallow mud flats without raw-water strainers. Operators must supply clean ultra-low sulfur diesel fuel and inspect heat exchanger sacrificial zinc anodes regularly to stop galvanic corrosion.

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

Factory Warranty Shipment Parts Manifest

Yanmar Marine provides a 2-Year limited warranty backed by 3-Year major component structural coverage. The shipment crate contains the 8LV-370 diesel engine core, ZF marine gearbox, 12V 180A alternator, 3.0 kW starter motor, flexible vibration mounts, VC10 display panel, wiring harness, and factory technical manuals.